Source: https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-4-changing-models-atomic-theory

[Revision notes](https://senecalearning.com/en-gb/revision-notes.md) › [KS3](https://senecalearning.com/en-gb/revision-notes/ks3.md) › [Science](https://senecalearning.com/en-gb/revision-notes/ks3/science.md) › [Science: KS3](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3.md) › Changing Models – Atomic Theory

# Changing Models – Atomic Theory

Science: KS3, topic 4.1.4

## Changing Models – Atomic Theory

As scientific understanding develops models and analogies are changed. Models are used by Scientists to predict what will happen in experiments so it is important they are updated. For example, as new evidence is discovered the atom model is changing.

### Democritus

![Democritus](https://image-v2.cdn.app.senecalearning.com/2018-10/36b83f6a-2de8-4d86-bf0a-a529ec9877d4/cheese-hard-wheel-.jpg)

- When? 5th century BC
- Democritus devised the term atomos meaning indivisible. 
- He used an analogy of a lump of cheese. 
 - If you cut it in half and half again, eventually you will get to a point where it could not be cut any further. 
- He did not know what ‘they’ looked like.

### John Dalton – The Billiard Ball Model

![John Dalton – The Billiard Ball Model](https://image-v2.cdn.app.senecalearning.com/courseImages/chemistry/1.1.2%20-%20Model%20of%20the%20atom/atom-1674878_640-min%20-%20Edited.jpg)

- When? 1803
- Dalton said:
 - That atomos  make up elements that he called atoms
 - Different elements have different atoms
 - Atoms of the same element are identical
 - Atoms can not be created or destroyed
 - If you join different elements up they make compounds
- He said these atoms were tiny and invisible.
- Dalton used tiny balls as a model to explain his ideas this is often known as the Billiard Ball Model.

### JJ (Joseph John) Thompson – The Plum Pudding Model

![JJ (Joseph John) Thompson – The Plum Pudding Model](https://image-v2.cdn.app.senecalearning.com/courseImages/biology/1.1.1%20-%20Types%20of%20cells/sweet-snack-crumbs-digestive%20-%20Edited-min.jpg)

- When? From 1897
- Thomson’s experiments discovered the electron.
- He proposed that atoms where a ball of positive charge has negatively charged electrons embedded in it.
- His model has been called the Plum Pudding Model. 
 - In America this is often called the Chocolate Chip Cookie Model.

### Ernest Rutherford – The Nuclear Model

![Ernest Rutherford – The Nuclear Model](https://image-v2.cdn.app.senecalearning.com/2019-07/8b93336e-745b-4dea-aaa3-16aa1678ad07/estrutura-atom-atomo-.png)

- When? 1911
- Completed the gold foil alpha scattering experiment in which he fired alpha particles from radioactive sources. 
- Most alpha particles went straight through however few were scattered at different directions.
- He found that the atom was:
 - Mostly empty space.
 - The middle of the atom is a solid mass called the nucleus.
 - The nucleus is positively charged containing protons.
 - Electrons surround the nucleus at a distance.
- Rutherford’s model is known as the Nuclear Model.

### Niels Bohr – The Planetary Model

![Niels Bohr – The Planetary Model](https://image-v2.cdn.app.senecalearning.com/courseImages/chemistry/(s)%202.1.4.8%20-%20CO2%20dot%20and%20cross%20with%20shells-min.png)

- When? 1913
- Discovered electrons orbit the nucleus at set distances and are arranged in shells or orbitals.
- The first shell can fit two electrons, the second shell can fit eight electrons, the third shell can fit eight electrons 
- This model is called the Planetary Model

### James Chadwick – The Quantum Model

![James Chadwick – The Quantum Model](https://image-v2.cdn.app.senecalearning.com/courseImages/physics/5.1.1.1a%20-%20Nucleus%20structure,%20protons,%20neutrons-min.png)

- When? 1932
- Chadwick discovered a particle with the same mass as a proton but with no charge. 
 - This is unlike the proton which has a positive charge.
- He called these neutrons. 
- These are found in the nucleus.
- This model is known as the Quantum Model.

## Test yourself on Changing Models – Atomic Theory

- Which of these models is the newest?
- Bohr created the Planetary Model of the atom. Which statement about his model is incorrect?
- What is the Plum Pudding Model often called in America?
- Select the true statement about Dalton's Billiard Ball Model

[Practise this topic for free](https://app.senecalearning.com/classroom/course/419c7523-d408-4bc7-9b96-f7f12abdacae/section/e209ca0c-ead6-46f0-ba1c-16b57e4edc2f/session)

- Previous topic: [4.1.3 Analogies in Science](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-3-analogies-in-science.md)
- Next topic: [4.1.5 Working Safely in the Lab](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-5-working-safely-in-the-lab.md)

## Science: KS3 contents

### 1 Biology
- 1.1 Cells, Tissues & Organs
  - [1.1.1 Microscopes](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-1-microscopes.md)
  - [1.1.2 Magnification](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-2-magnification.md)
  - [1.1.3 Multicellular Organisms](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-3-multicellular-organisms.md)
  - [1.1.4 Tissues](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-4-tissues.md)
  - [1.1.5 Organs](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-5-organs.md)
  - [1.1.6 Unicellular Organisms](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-6-unicellular-organisms.md)
  - [1.1.7 Diffusion](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-7-diffusion.md)
  - [1.1.8 Factors Affecting Diffusion](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-8-factors-affecting-diffusion.md)
  - [1.1.9 Plant Cells](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-9-plant-cells.md)
  - [1.1.10 Cellulose](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-10-cellulose.md)
  - [1.1.11 Plant Tissues](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-11-plant-tissues.md)
  - [1.1.12 Leaves](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-12-leaves.md)
  - [1.1.13 Animal Cells](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-13-animal-cells.md)
  - [1.1.14 Comparing Animal & Plant Cells](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-14-comparing-animal-and-plant-cells.md)
  - [1.1.15 How to Make a Model Animal & Plant Cell](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-15-how-to-make-a-model-animal-and-plant-cell.md)
  - [1.1.16 Specialised Cells](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-16-specialised-cells.md)
  - [1.1.17 Stem Cells](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-17-stem-cells.md)
  - [1.1.18 Uses of Stem Cells](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-18-uses-of-stem-cells.md)
  - [1.1.19 Disadvantages of Stem Cells](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-19-disadvantages-of-stem-cells.md)
  - [1.1.20 Blood Components](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-20-blood-components.md)
  - [1.1.21 Platelets](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-21-platelets.md)
  - [1.1.22 The Lungs](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-22-the-lungs.md)
  - [1.1.23 Breathing](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-23-breathing.md)
  - [1.1.24 Plant Gas Exchange](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-24-plant-gas-exchange.md)
  - [1.1.25 Drugs](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-25-drugs.md)
  - [1.1.26 Diagnostic Misconceptions - Microbes](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-26-diagnostic-misconceptions-microbes.md)
  - [1.1.27 Diagnostic Misconceptions - Diff. vs Specialised](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-27-diagnostic-misconceptions-diff-vs-specialised.md)
  - [1.1.28 Diagnostic Misconceptions - Types of Cell](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-28-diagnostic-misconceptions-types-of-cell.md)
  - [1.1.29 Diagnostic Misconceptions - Plants & Animal Cells](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-29-diagnostic-misconceptions-plants-and-animal-cells.md)
  - [1.1.30 End of Topic Test - Magnification & Cells](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-30-end-of-topic-test-magnification-and-cells.md)
  - [1.1.31 End of Topic Test - Cells & Organisation](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-31-end-of-topic-test-cells-and-organisation.md)
  - [1.1.32 End of Topic Test - Living Organisms](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-1-32-end-of-topic-test-living-organisms.md)
- 1.2 Reproduction & Variation
  - [1.2.1 Reproduction in Humans](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-1-reproduction-in-humans.md)
  - [1.2.2 Male Reproductive System](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-2-male-reproductive-system.md)
  - [1.2.3 Female Reproductive System](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-3-female-reproductive-system.md)
  - [1.2.4 Gestation](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-4-gestation.md)
  - [1.2.5 Pregnancy](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-5-pregnancy.md)
  - [1.2.6 Puberty](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-6-puberty.md)
  - [1.2.7 The Menstrual Cycle](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-7-the-menstrual-cycle.md)
  - [1.2.8 Reproduction in Plants](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-8-reproduction-in-plants.md)
  - [1.2.9 Asexual Reproduction](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-9-asexual-reproduction.md)
  - [1.2.10 Advantages of Asexual Reproduction](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-10-advantages-of-asexual-reproduction.md)
  - [1.2.11 Adaptations](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-11-adaptations.md)
  - [1.2.12 Evolution](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-12-evolution.md)
  - [1.2.13 Pollination](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-13-pollination.md)
  - [1.2.14 Dispersal Method](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-14-dispersal-method.md)
  - [1.2.15 Variation](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-15-variation.md)
  - [1.2.16 Causes of Variation](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-16-causes-of-variation.md)
  - [1.2.17 Inheritance](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-17-inheritance.md)
  - [1.2.18 Species & Selective Breeding](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-18-species-and-selective-breeding.md)
  - [1.2.19 Genetic Conditions - Cystic Fibrosis](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-19-genetic-conditions-cystic-fibrosis.md)
  - [1.2.20 Genetic Conditions - Haemophilia](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-20-genetic-conditions-haemophilia.md)
  - [1.2.21 End of Topic Test - Reproduction & Puberty](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-21-end-of-topic-test-reproduction-and-puberty.md)
  - [1.2.22 End of Topic Test - Reproduction & Variation](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-22-end-of-topic-test-reproduction-and-variation.md)
  - [1.2.23 Diagnostic Misconceptions - Asexual](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-2-23-diagnostic-misconceptions-asexual.md)
- 1.3 Ecological Relationships & Classification
  - [1.3.1 Species Interdependence](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-1-species-interdependence.md)
  - [1.3.2 Food Chains & Webs](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-2-food-chains-and-webs.md)
  - [1.3.3 Changes to Food Webs - Plants](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-3-changes-to-food-webs-plants.md)
  - [1.3.4 Changes to Food Webs - Animals](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-4-changes-to-food-webs-animals.md)
  - [1.3.5 Changes to Food Webs - Factors](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-5-changes-to-food-webs-factors.md)
  - [1.3.6 Relationships in an Ecosystem](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-6-relationships-in-an-ecosystem.md)
  - [1.3.7 The Impact of Environmental Change](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-7-the-impact-of-environmental-change.md)
  - [1.3.8 Decomposers](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-8-decomposers.md)
  - [1.3.9 Decay](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-9-decay.md)
  - [1.3.10 Assessing Ecosystems](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-10-assessing-ecosystems.md)
  - [1.3.11 Ecological Sampling - Quadrats](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-11-ecological-sampling-quadrats.md)
  - [1.3.12 Ecological Sampling](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-12-ecological-sampling.md)
  - [1.3.13 Required Practical - Estimating Population Size](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-13-required-practical-estimating-population-size.md)
  - [1.3.14 Pyramids of Number & Biomass](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-14-pyramids-of-number-and-biomass.md)
  - [1.3.15 Classification of Living Organisms](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-15-classification-of-living-organisms.md)
  - [1.3.16 Competition Between Organisms](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-16-competition-between-organisms.md)
  - [1.3.17 Adaptations of Plants](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-17-adaptations-of-plants.md)
  - [1.3.18 Natural Selection](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-18-natural-selection.md)
  - [1.3.19 Evidence for Evolution](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-19-evidence-for-evolution.md)
  - [1.3.20 Environmental Changes & Extinctions](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-20-environmental-changes-and-extinctions.md)
  - [1.3.21 The Importance of Biodiversity](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-21-the-importance-of-biodiversity.md)
  - [1.3.22 Bioaccumulation](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-22-bioaccumulation.md)
  - [1.3.23 Bioaccumulation - DDT & Mercury](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-23-bioaccumulation-ddt-and-mercury.md)
  - [1.3.24 End of Topic Test - Food Webs](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-24-end-of-topic-test-food-webs.md)
  - [1.3.25 End of Topic Test - Material Cycles & Energy](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-25-end-of-topic-test-material-cycles-and-energy.md)
  - [1.3.26 End of Topic Test - Population & Evolution](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-3-26-end-of-topic-test-population-and-evolution.md)
- 1.4 Digestion & Nutrition
  - [1.4.1 Balanced Diets](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-4-1-balanced-diets.md)
  - [1.4.2 Vitamins](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-4-2-vitamins.md)
  - [1.4.3 Minerals](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-4-3-minerals.md)
  - [1.4.4 Protein](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-4-4-protein.md)
  - [1.4.5 Lipids, Oils & Fats](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-4-5-lipids-oils-and-fats.md)
  - [1.4.6 Carbohydrates](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-4-6-carbohydrates.md)
  - [1.4.7 Starch](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-4-7-starch.md)
  - [1.4.8 Energy Needs](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-4-8-energy-needs.md)
  - [1.4.9 Dietary Fibre](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-4-9-dietary-fibre.md)
  - [1.4.10 Diseases Caused by Nutritional Deficiencies](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-4-10-diseases-caused-by-nutritional-deficiencies.md)
  - [1.4.11 Digestion](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-4-11-digestion.md)
  - [1.4.12 Enzymes in Digestion](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-4-12-enzymes-in-digestion.md)
  - [1.4.13 Required Practical - Enzymes in Digestion](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-4-13-required-practical-enzymes-in-digestion.md)
  - [1.4.14 Plant Nutrition](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-4-14-plant-nutrition.md)
  - [1.4.15 Diagnostic Misconceptions - Digestion](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-4-15-diagnostic-misconceptions-digestion.md)
  - [1.4.16 Diagnostic Misconceptions - Excretion vs Egestion](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-4-16-diagnostic-misconceptions-excretion-vs-egestion.md)
  - [1.4.17 End of Topic Test - Nutrition](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-4-17-end-of-topic-test-nutrition.md)
- 1.5 Plants & Photosynthesis
  - [1.5.1 Roots](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-5-1-roots.md)
  - [1.5.2 Photosynthesis](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-5-2-photosynthesis.md)
  - [1.5.3 Leaves in Photosynthesis](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-5-3-leaves-in-photosynthesis.md)
  - [1.5.4 Rate of Photosynthesis](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-5-4-rate-of-photosynthesis.md)
  - [1.5.5 Testing the Rate of Photosynthesis](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-5-5-testing-the-rate-of-photosynthesis.md)
  - [1.5.6 Water Transport in Plants](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-5-6-water-transport-in-plants.md)
  - [1.5.7 Translocation](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-5-7-translocation.md)
  - [1.5.8 The Carbon Cycle](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-5-8-the-carbon-cycle.md)
  - [1.5.9 Human Activities & Carbon Dioxide](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-5-9-human-activities-and-carbon-dioxide.md)
  - [1.5.10 Diagnostic Misconceptions - Plant Food](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-5-10-diagnostic-misconceptions-plant-food.md)
  - [1.5.11 End of Topic Test - Plants & Photosynthesis](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-5-11-end-of-topic-test-plants-and-photosynthesis.md)
  - [1.5.12 Diagnostic Misconceptions - Transpiration](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-5-12-diagnostic-misconceptions-transpiration.md)
- 1.6 Biological Systems & Processes
  - [1.6.1 Living Organisms](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-1-living-organisms.md)
  - [1.6.2 Dichotomous Keys](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-2-dichotomous-keys.md)
  - [1.6.3 Biomechanics](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-3-biomechanics.md)
  - [1.6.4 Muscles](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-4-muscles.md)
  - [1.6.5 The Skeleton](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-5-the-skeleton.md)
  - [1.6.6 Bones](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-6-bones.md)
  - [1.6.7 Tendons & Ligaments](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-7-tendons-and-ligaments.md)
  - [1.6.8 Joints](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-8-joints.md)
  - [1.6.9 Carpals & Tarsals](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-9-carpals-and-tarsals.md)
  - [1.6.10 Measuring Forces](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-10-measuring-forces.md)
  - [1.6.11 Antagonistic Muscle Pairings](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-11-antagonistic-muscle-pairings.md)
  - [1.6.12 The Respiratory System](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-12-the-respiratory-system.md)
  - [1.6.13 Exchange Surface Area](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-13-exchange-surface-area.md)
  - [1.6.14 Gas Exchange](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-14-gas-exchange.md)
  - [1.6.15 Structure & Function of the Gas Exchange System](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-15-structure-and-function-of-the-gas-exchange-system.md)
  - [1.6.16 Breathing](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-16-breathing.md)
  - [1.6.17 Respiration](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-17-respiration.md)
  - [1.6.18 Respiration During Exercise](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-18-respiration-during-exercise.md)
  - [1.6.19 Anaerobic Respiration](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-19-anaerobic-respiration.md)
  - [1.6.20 Lactic Acid](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-20-lactic-acid.md)
  - [1.6.21 Effects of Smoking on the Respiratory System](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-21-effects-of-smoking-on-the-respiratory-system.md)
  - [1.6.22 Balanced Diets](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-22-balanced-diets.md)
  - [1.6.23 Human Growth & Development](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-23-human-growth-and-development.md)
  - [1.6.24 DNA](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-24-dna.md)
  - [1.6.25 Alleles](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-25-alleles.md)
  - [1.6.26 Genotype vs Phenotype](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-26-genotype-vs-phenotype.md)
  - [1.6.27 Punnett Squares](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-27-punnett-squares.md)
  - [1.6.28 The Double Circulatory System](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-28-the-double-circulatory-system.md)
  - [1.6.29 The Heart](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-29-the-heart.md)
  - [1.6.30 Blood](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-30-blood.md)
  - [1.6.31 Blood Vessels](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-31-blood-vessels.md)
  - [1.6.32 The Renal System](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-32-the-renal-system.md)
  - [1.6.33 Glucose](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-33-glucose.md)
  - [1.6.34 Diabetes](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-34-diabetes.md)
  - [1.6.35 Blood Glucose](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-35-blood-glucose.md)
  - [1.6.36 Human Illnesses](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-36-human-illnesses.md)
  - [1.6.37 Bacterial & Viral Infections](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-37-bacterial-and-viral-infections.md)
  - [1.6.38 Antibiotics](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-38-antibiotics.md)
  - [1.6.39 Vaccinations](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-39-vaccinations.md)
  - [1.6.40 How Antibiotics & Vaccines Work](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-40-how-antibiotics-and-vaccines-work.md)
  - [1.6.41 The Effects of Recreational Drug Use](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-41-the-effects-of-recreational-drug-use.md)
  - [1.6.42 Mental Health](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-42-mental-health.md)
  - [1.6.43 Depression & Anxiety](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-43-depression-and-anxiety.md)
  - [1.6.44 End of Topic Test - Muscles & Bones](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-44-end-of-topic-test-muscles-and-bones.md)
  - [1.6.45 End of Topic Test - Respiration](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-45-end-of-topic-test-respiration.md)
  - [1.6.46 End of Topic Test - DNA & The Circulatory System](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-46-end-of-topic-test-dna-and-the-circulatory-system.md)
  - [1.6.47 End of Topic Test - Human Illnesses & Vaccination](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/1-6-47-end-of-topic-test-human-illnesses-and-vaccination.md)

### 2 Chemistry
- 2.1 Particles
  - [2.1.1 Particles](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-1-particles.md)
  - [2.1.2 States of Matter](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-2-states-of-matter.md)
  - [2.1.3 Compression of Substances](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-3-compression-of-substances.md)
  - [2.1.4 Shape of Substances](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-4-shape-of-substances.md)
  - [2.1.5 Changes of State](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-5-changes-of-state.md)
  - [2.1.6 Elements & Atoms](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-6-elements-and-atoms.md)
  - [2.1.7 Compounds](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-7-compounds.md)
  - [2.1.8 Diffusion](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-8-diffusion.md)
  - [2.1.9 Changing State](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-9-changing-state.md)
  - [2.1.10 Pressure](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-10-pressure.md)
  - [2.1.11 Temperature Increase in a Gas](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-11-temperature-increase-in-a-gas.md)
  - [2.1.12 Conservation of Mass](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-12-conservation-of-mass.md)
  - [2.1.13 Purity of Substances](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-13-purity-of-substances.md)
  - [2.1.14 Pure Substances](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-14-pure-substances.md)
  - [2.1.15 Evaporation](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-15-evaporation.md)
  - [2.1.16 Mixtures](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-16-mixtures.md)
  - [2.1.17 Separating Mixtures](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-17-separating-mixtures.md)
  - [2.1.18 Distillation](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-18-distillation.md)
  - [2.1.19 Chromatography](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-19-chromatography.md)
  - [2.1.20 Solubility](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-20-solubility.md)
  - [2.1.21 Investigating Solubility](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-21-investigating-solubility.md)
  - [2.1.22 Chemical Symbols](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-22-chemical-symbols.md)
  - [2.1.23 Chemical Formulae](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-23-chemical-formulae.md)
  - [2.1.24 Polymers](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-24-polymers.md)
  - [2.1.25 Ceramics](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-25-ceramics.md)
  - [2.1.26 Composites](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-26-composites.md)
  - [2.1.27 End of Topic Testing - Substances](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-27-end-of-topic-testing-substances.md)
  - [2.1.28 End of Topic Testing - Mixtures](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-28-end-of-topic-testing-mixtures.md)
  - [2.1.29 End of Topic Testing - Chemical Symbols & Polymers](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-29-end-of-topic-testing-chemical-symbols-and-polymers.md)
  - [2.1.30 Diagnostic Misconceptions - Particles](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-30-diagnostic-misconceptions-particles.md)
  - [2.1.31 Diagnostic Misconceptions - Temperature](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-31-diagnostic-misconceptions-temperature.md)
  - [2.1.32 Diagnostic Misconceptions - Boiling Liquids](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-1-32-diagnostic-misconceptions-boiling-liquids.md)
- 2.2 Chemical Reactions
  - [2.2.1 Chemical Reactions](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-2-1-chemical-reactions.md)
  - [2.2.2 Common Reactions](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-2-2-common-reactions.md)
  - [2.2.3 Acids & Alkalis](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-2-3-acids-and-alkalis.md)
  - [2.2.4 Reactions of Acids](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-2-4-reactions-of-acids.md)
  - [2.2.5 Testing for Hydrogen](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-2-5-testing-for-hydrogen.md)
  - [2.2.6 The pH Scale](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-2-6-the-ph-scale.md)
  - [2.2.7 Titration](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-2-7-titration.md)
  - [2.2.8 End of Topic Test - Chemical Reactions](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-2-8-end-of-topic-test-chemical-reactions.md)
  - [2.2.9 Diagnostic Misconceptions - Sodium Chloride](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-2-9-diagnostic-misconceptions-sodium-chloride.md)
- 2.3 Atoms, Elements, Compounds
  - [2.3.1 Atoms](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-3-1-atoms.md)
  - [2.3.2 Elements](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-3-2-elements.md)
  - [2.3.3 Compounds & Mixtures](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-3-3-compounds-and-mixtures.md)
  - [2.3.4 Electron Configuration](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-3-4-electron-configuration.md)
  - [2.3.5 Chemical Symbols](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-3-5-chemical-symbols.md)
  - [2.3.6 Chemical Formulae](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-3-6-chemical-formulae.md)
  - [2.3.7 Conservation of Mass](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-3-7-conservation-of-mass.md)
  - [2.3.8 Vacuums](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-3-8-vacuums.md)
  - [2.3.9 Molecules](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-3-9-molecules.md)
  - [2.3.10 End of Topic Test - Particles & Atoms](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-3-10-end-of-topic-test-particles-and-atoms.md)
  - [2.3.11 Diagnostic Misconceptions - Law of Conservation](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-3-11-diagnostic-misconceptions-law-of-conservation.md)
- 2.4 The Periodic Table
  - [2.4.1 Physical Properties](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-4-1-physical-properties.md)
  - [2.4.2 Chemical Properties](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-4-2-chemical-properties.md)
  - [2.4.3 Mendeleev](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-4-3-mendeleev.md)
  - [2.4.4 The Periodic Table](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-4-4-the-periodic-table.md)
  - [2.4.5 Metals](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-4-5-metals.md)
  - [2.4.6 Non-Metals](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-4-6-non-metals.md)
  - [2.4.7 Properties of Metals & Non-Metals](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-4-7-properties-of-metals-and-non-metals.md)
  - [2.4.8 Alkali Metals](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-4-8-alkali-metals.md)
  - [2.4.9 Halogens](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-4-9-halogens.md)
  - [2.4.10 Oxides](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-4-10-oxides.md)
  - [2.4.11 End of Topic Test - The Periodic Table](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-4-11-end-of-topic-test-the-periodic-table.md)
  - [2.4.12 Diagnostic Misconceptions - Order of the PT](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-4-12-diagnostic-misconceptions-order-of-the-pt.md)
- 2.5 Materials & the Earth
  - [2.5.1 The Composition of The Earth](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-1-the-composition-of-the-earth.md)
  - [2.5.2 The Structure of the Earth](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-2-the-structure-of-the-earth.md)
  - [2.5.3 Igneous Rocks](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-3-igneous-rocks.md)
  - [2.5.4 Sedimentary Rocks](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-4-sedimentary-rocks.md)
  - [2.5.5 Metamorphic Rocks](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-5-metamorphic-rocks.md)
  - [2.5.6 The Rock Cycle](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-6-the-rock-cycle.md)
  - [2.5.7 Physical Weathering](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-7-physical-weathering.md)
  - [2.5.8 Chemical Weathering](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-8-chemical-weathering.md)
  - [2.5.9 Biological Weathering](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-9-biological-weathering.md)
  - [2.5.10 The Formation of Fossils](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-10-the-formation-of-fossils.md)
  - [2.5.11 Crude Oil](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-11-crude-oil.md)
  - [2.5.12 The Earth's Early Atmosphere](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-12-the-earths-early-atmosphere.md)
  - [2.5.13 The Earth's Atmosphere Today](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-13-the-earths-atmosphere-today.md)
  - [2.5.14 Oxygen in the Atmosphere](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-14-oxygen-in-the-atmosphere.md)
  - [2.5.15 Carbon Dioxide in the Atmosphere](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-15-carbon-dioxide-in-the-atmosphere.md)
  - [2.5.16 Greenhouse Gases](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-16-greenhouse-gases.md)
  - [2.5.17 Climate Change](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-17-climate-change.md)
  - [2.5.18 Resources](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-18-resources.md)
  - [2.5.19 Recycling](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-19-recycling.md)
  - [2.5.20 Ceramics](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-20-ceramics.md)
  - [2.5.21 Polymers](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-21-polymers.md)
  - [2.5.22 Composites](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-22-composites.md)
  - [2.5.23 End of Topic Test - Earth](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-23-end-of-topic-test-earth.md)
  - [2.5.24 End of Topic Test - Materials](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-24-end-of-topic-test-materials.md)
  - [2.5.25 End of Topic Test - Polymers](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-25-end-of-topic-test-polymers.md)
  - [2.5.26 Diagnostic Misconceptions - Air](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-26-diagnostic-misconceptions-air.md)
  - [2.5.27 Diagnostic Misconceptions - Greenhouse Effect](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-5-27-diagnostic-misconceptions-greenhouse-effect.md)
- 2.6 Reactivity
  - [2.6.1 Ions](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-6-1-ions.md)
  - [2.6.2 Ionic Bonding](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-6-2-ionic-bonding.md)
  - [2.6.3 State Symbols](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-6-3-state-symbols.md)
  - [2.6.4 Balancing Chemical Equations](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-6-4-balancing-chemical-equations.md)
  - [2.6.5 Relative Formula Mass](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-6-5-relative-formula-mass.md)
  - [2.6.6 Calculating the Relative Formula Mass](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-6-6-calculating-the-relative-formula-mass.md)
  - [2.6.7 The Reactivity Series](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-6-7-the-reactivity-series.md)
  - [2.6.8 Carbon & The Reactivity Series](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-6-8-carbon-and-the-reactivity-series.md)
  - [2.6.9 Displacement Reactions](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-6-9-displacement-reactions.md)
  - [2.6.10 Displacement Reactions - Halogens](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-6-10-displacement-reactions-halogens.md)
  - [2.6.11 Alloys](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-6-11-alloys.md)
  - [2.6.12 Metal Alloys](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-6-12-metal-alloys.md)
  - [2.6.13 End of Topic Test - Ions](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-6-13-end-of-topic-test-ions.md)
  - [2.6.14 End of Topic Test - Reactivity](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-6-14-end-of-topic-test-reactivity.md)
- 2.7 Energetics
  - [2.7.1 Measuring Gas Production](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-7-1-measuring-gas-production.md)
  - [2.7.2 Observing a Colour Change](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-7-2-observing-a-colour-change.md)
  - [2.7.3 Analysing Reaction Rates](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-7-3-analysing-reaction-rates.md)
  - [2.7.4 Factors Affecting the Rate of Reaction](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-7-4-factors-affecting-the-rate-of-reaction.md)
  - [2.7.5 Catalysts](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-7-5-catalysts.md)
  - [2.7.6 Testing for Oxygen](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-7-6-testing-for-oxygen.md)
  - [2.7.7 Energy Changes During Reactions](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-7-7-energy-changes-during-reactions.md)
  - [2.7.8 End of Topic Test - Energetics](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-7-8-end-of-topic-test-energetics.md)
- 2.8 Properties of Materials
  - [2.8.1 Testing for Gases](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-8-1-testing-for-gases.md)
  - [2.8.2 Alloys](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-8-2-alloys.md)
  - [2.8.3 Density](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-8-3-density.md)
  - [2.8.4 Density of Solids, Liquids & Gases HyperLearning](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-8-4-density-of-solids-liquids-and-gases-hyperlearning.md)
  - [2.8.5 End of Topic Test - Properties of Materials](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/2-8-5-end-of-topic-test-properties-of-materials.md)

### 3 Physics
- 3.1 Energy
  - [3.1.1 Energy Stores & Pathways](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-1-energy-stores-and-pathways.md)
  - [3.1.2 Energy Transfers](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-2-energy-transfers.md)
  - [3.1.3 Common Energy Transfers](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-3-common-energy-transfers.md)
  - [3.1.4 Wasted Energy](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-4-wasted-energy.md)
  - [3.1.5 Efficiency of Energy Transfer](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-5-efficiency-of-energy-transfer.md)
  - [3.1.6 Sankey Diagrams](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-6-sankey-diagrams.md)
  - [3.1.7 Heat & Temperature](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-7-heat-and-temperature.md)
  - [3.1.8 Heat Transfer](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-8-heat-transfer.md)
  - [3.1.9 Conductors vs Insulators](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-9-conductors-vs-insulators.md)
  - [3.1.10 Reducing Energy Transfers](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-10-reducing-energy-transfers.md)
  - [3.1.11 Energy & Power](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-11-energy-and-power.md)
  - [3.1.12 Energy in Food](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-12-energy-in-food.md)
  - [3.1.13 Calories](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-13-calories.md)
  - [3.1.14 Food Labels](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-14-food-labels.md)
  - [3.1.15 Power Ratings of Appliances](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-15-power-ratings-of-appliances.md)
  - [3.1.16 Comparing Bulbs](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-16-comparing-bulbs.md)
  - [3.1.17 Fuel Bills](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-17-fuel-bills.md)
  - [3.1.18 Calculating Fuel Bills](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-18-calculating-fuel-bills.md)
  - [3.1.19 Non-Renewable Energy - Fossil Fuels](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-19-non-renewable-energy-fossil-fuels.md)
  - [3.1.20 Other Non-Renewables](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-20-other-non-renewables.md)
  - [3.1.21 Renewable Energy - Air & Ground](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-21-renewable-energy-air-and-ground.md)
  - [3.1.22 Renewable Energy - Water](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-22-renewable-energy-water.md)
  - [3.1.23 Conservation of Energy](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-23-conservation-of-energy.md)
  - [3.1.24 End of Topic Test - Energy](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-24-end-of-topic-test-energy.md)
  - [3.1.25 End of Topic Test - Energy & Non-Renewables](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-25-end-of-topic-test-energy-and-non-renewables.md)
  - [3.1.26 End of Topic Test - Energy in Things](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-26-end-of-topic-test-energy-in-things.md)
  - [3.1.27 Diagnostic Misconceptions - Stationary Objects](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-1-27-diagnostic-misconceptions-stationary-objects.md)
- 3.2 Forces & Motion
  - [3.2.1 Forces](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-1-forces.md)
  - [3.2.2 Contact Forces](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-2-contact-forces.md)
  - [3.2.3 Balanced Forces](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-3-balanced-forces.md)
  - [3.2.4 Force Diagrams & Resultant Forces](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-4-force-diagrams-and-resultant-forces.md)
  - [3.2.5 Free Body Diagram - Uses](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-5-free-body-diagram-uses.md)
  - [3.2.6 Force & Acceleration](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-6-force-and-acceleration.md)
  - [3.2.7 Gravity](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-7-gravity.md)
  - [3.2.8 Weight](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-8-weight.md)
  - [3.2.9 Pressure](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-9-pressure.md)
  - [3.2.10 Speed](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-10-speed.md)
  - [3.2.11 Relative Motion](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-11-relative-motion.md)
  - [3.2.12 Friction 1](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-12-friction-1.md)
  - [3.2.13 Friction 2](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-13-friction-2.md)
  - [3.2.14 Turning Effect](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-14-turning-effect.md)
  - [3.2.15 Moment](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-15-moment.md)
  - [3.2.16 Equation for Moments](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-16-equation-for-moments.md)
  - [3.2.17 Water & Air Resistance](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-17-water-and-air-resistance.md)
  - [3.2.18 Distance-Time Graphs](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-18-distance-time-graphs.md)
  - [3.2.19 Levers](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-19-levers.md)
  - [3.2.20 Work & Machines](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-20-work-and-machines.md)
  - [3.2.21 Work](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-21-work.md)
  - [3.2.22 Machines](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-22-machines.md)
  - [3.2.23 Elasticity](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-23-elasticity.md)
  - [3.2.24 Elasticity - Hooke's Law](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-24-elasticity-hookes-law.md)
  - [3.2.25 Archimedes Principle](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-25-archimedes-principle.md)
  - [3.2.26 Floating & Sinking](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-26-floating-and-sinking.md)
  - [3.2.27 Vacuums](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-27-vacuums.md)
  - [3.2.28 Thermal Energy & Conduction](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-28-thermal-energy-and-conduction.md)
  - [3.2.29 Convection & Radiation](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-29-convection-and-radiation.md)
  - [3.2.30 Evaporation](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-30-evaporation.md)
  - [3.2.31 End of Topic Test - Forces](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-31-end-of-topic-test-forces.md)
  - [3.2.32 End of Topic Test - Motion](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-32-end-of-topic-test-motion.md)
  - [3.2.33 End of Topic Test - Work](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-33-end-of-topic-test-work.md)
  - [3.2.34 End of Topic Test - Vacuums](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-34-end-of-topic-test-vacuums.md)
  - [3.2.35 Diagnostic Misconceptions - Weight vs Mass](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-35-diagnostic-misconceptions-weight-vs-mass.md)
  - [3.2.36 Diagnostic Misconceptions - Gravity](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-2-36-diagnostic-misconceptions-gravity.md)
- 3.3 Waves
  - [3.3.1 Waves](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-1-waves.md)
  - [3.3.2 Types of Waves](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-2-types-of-waves.md)
  - [3.3.3 Observing Waves](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-3-observing-waves.md)
  - [3.3.4 Wave Speed](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-4-wave-speed.md)
  - [3.3.5 Earthquakes](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-5-earthquakes.md)
  - [3.3.6 Hearing](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-6-hearing.md)
  - [3.3.7 Observing Sound](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-7-observing-sound.md)
  - [3.3.8 Sound waves are Longitudinal Waves](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-8-sound-waves-are-longitudinal-waves.md)
  - [3.3.9 Uses of Sound Waves](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-9-uses-of-sound-waves.md)
  - [3.3.10 The Interactions of Sound with Different Mediums](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-10-the-interactions-of-sound-with-different-mediums.md)
  - [3.3.11 Reflecting Sounds](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-11-reflecting-sounds.md)
  - [3.3.12 The Speed of Sound](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-12-the-speed-of-sound.md)
  - [3.3.13 Measuring the Speed of Sound](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-13-measuring-the-speed-of-sound.md)
  - [3.3.14 The Hearing Range of Humans](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-14-the-hearing-range-of-humans.md)
  - [3.3.15 The Human Ear](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-15-the-human-ear.md)
  - [3.3.16 Light Waves](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-16-light-waves.md)
  - [3.3.17 Coloured Light](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-17-coloured-light.md)
  - [3.3.18 Observing Light](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-18-observing-light.md)
  - [3.3.19 Reflection](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-19-reflection.md)
  - [3.3.20 Drawing a Reflected Image](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-20-drawing-a-reflected-image.md)
  - [3.3.21 Refraction of Light 1](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-21-refraction-of-light-1.md)
  - [3.3.22 Refraction of Light 2](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-22-refraction-of-light-2.md)
  - [3.3.23 The Human Eye](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-23-the-human-eye.md)
  - [3.3.24 The Eye as a Pinhole Camera](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-24-the-eye-as-a-pinhole-camera.md)
  - [3.3.25 Lenses](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-25-lenses.md)
  - [3.3.26 Colour](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-26-colour.md)
  - [3.3.27 Seeing Colour](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-27-seeing-colour.md)
  - [3.3.28 Colours of Light](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-28-colours-of-light.md)
  - [3.3.29 Drawing Waves](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-29-drawing-waves.md)
  - [3.3.30 Wave Interactions](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-30-wave-interactions.md)
  - [3.3.31 Comparing Sound & Light](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-31-comparing-sound-and-light.md)
  - [3.3.32 General Principles of Radiation](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-32-general-principles-of-radiation.md)
  - [3.3.33 Temperature & Black Bodies](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-33-temperature-and-black-bodies.md)
  - [3.3.34 Production of Electromagnetic Waves](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-34-production-of-electromagnetic-waves.md)
  - [3.3.35 Sound as Radiation](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-35-sound-as-radiation.md)
  - [3.3.36 Light as Radiation](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-36-light-as-radiation.md)
  - [3.3.37 End of Topic Test - Sound](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-37-end-of-topic-test-sound.md)
  - [3.3.38 End of Topic Test - Light](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-38-end-of-topic-test-light.md)
  - [3.3.39 End of Topic Test - Waves](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-39-end-of-topic-test-waves.md)
  - [3.3.40 End of Topic Test - Waves 2](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-40-end-of-topic-test-waves-2.md)
  - [3.3.41 Diagnostic Misconceptions - Reflection](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-41-diagnostic-misconceptions-reflection.md)
  - [3.3.42 Diagnostic Misconceptions - Wave Speed](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-3-42-diagnostic-misconceptions-wave-speed.md)
- 3.4 Electricity & Magnetism
  - [3.4.1 Circuit Symbols](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-1-circuit-symbols.md)
  - [3.4.2 Resistors & Diodes](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-2-resistors-and-diodes.md)
  - [3.4.3 Electric Current](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-3-electric-current.md)
  - [3.4.4 Measuring Current](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-4-measuring-current.md)
  - [3.4.5 Potential Difference](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-5-potential-difference.md)
  - [3.4.6 Series Circuits](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-6-series-circuits.md)
  - [3.4.7 Parallel Circuits](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-7-parallel-circuits.md)
  - [3.4.8 Resistance](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-8-resistance.md)
  - [3.4.9 Charges](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-9-charges.md)
  - [3.4.10 Static Electricity](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-10-static-electricity.md)
  - [3.4.11 Magnets](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-11-magnets.md)
  - [3.4.12 Magnetic Fields](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-12-magnetic-fields.md)
  - [3.4.13 The Earth's Field](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-13-the-earths-field.md)
  - [3.4.14 Electromagnetism](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-14-electromagnetism.md)
  - [3.4.15 Uses of Electromagnets](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-15-uses-of-electromagnets.md)
  - [3.4.16 Strength of Magnetic Fields](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-16-strength-of-magnetic-fields.md)
  - [3.4.17 Circuit Symbols HyperLearning](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-17-circuit-symbols-hyperlearning.md)
  - [3.4.18 End of Topic Test - Electricity](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-18-end-of-topic-test-electricity.md)
  - [3.4.19 End of Topic Test - Magnetism](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-19-end-of-topic-test-magnetism.md)
  - [3.4.20 Diagnostic Misconceptions - Positive Charge](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-20-diagnostic-misconceptions-positive-charge.md)
  - [3.4.21 Diagnostic Misconceptions - Powering a Circuit](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-4-21-diagnostic-misconceptions-powering-a-circuit.md)
- 3.5 Matter
  - [3.5.1 Physical Reactions](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-1-physical-reactions.md)
  - [3.5.2 Changes of State](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-2-changes-of-state.md)
  - [3.5.3 Particles](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-3-particles.md)
  - [3.5.4 Density](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-4-density.md)
  - [3.5.5 Density & the Particle Model](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-5-density-and-the-particle-model.md)
  - [3.5.6 The Equation for Density](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-6-the-equation-for-density.md)
  - [3.5.7 Dissolving](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-7-dissolving.md)
  - [3.5.8 Brownian Motion](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-8-brownian-motion.md)
  - [3.5.9 Diffusion](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-9-diffusion.md)
  - [3.5.10 Filtration](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-10-filtration.md)
  - [3.5.11 Solids](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-11-solids.md)
  - [3.5.12 Liquids](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-12-liquids.md)
  - [3.5.13 Gases](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-13-gases.md)
  - [3.5.14 Weight & Mass](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-14-weight-and-mass.md)
  - [3.5.15 Gravity](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-15-gravity.md)
  - [3.5.16 Gravitational Field Strength](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-16-gravitational-field-strength.md)
  - [3.5.17 Gravity in Space](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-17-gravity-in-space.md)
  - [3.5.18 Atmospheric Pressure](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-18-atmospheric-pressure.md)
  - [3.5.19 Liquid Pressure](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-19-liquid-pressure.md)
  - [3.5.20 End of Topic Test - States of Matter](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-20-end-of-topic-test-states-of-matter.md)
  - [3.5.21 End of Topic Test - Weight](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-21-end-of-topic-test-weight.md)
  - [3.5.22 Diagnostic Misconceptions - Floating](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-5-22-diagnostic-misconceptions-floating.md)
- 3.6 Space Physics
  - [3.6.1 The Sun](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-6-1-the-sun.md)
  - [3.6.2 The Planets](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-6-2-the-planets.md)
  - [3.6.3 Other Astronomical Bodies](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-6-3-other-astronomical-bodies.md)
  - [3.6.4 The Milky Way](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-6-4-the-milky-way.md)
  - [3.6.5 Beyond The Milky Way](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-6-5-beyond-the-milky-way.md)
  - [3.6.6 The Seasons](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-6-6-the-seasons.md)
  - [3.6.7 Days, Months & Years](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-6-7-days-months-and-years.md)
  - [3.6.8 The Moon](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-6-8-the-moon.md)
  - [3.6.9 Light Years](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-6-9-light-years.md)
  - [3.6.10 End of Topic Test - Space](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-6-10-end-of-topic-test-space.md)
  - [3.6.11 Diagnostic Misconceptions - Distance from the Sun](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/3-6-11-diagnostic-misconceptions-distance-from-the-sun.md)

### 4 Disciplinary Knowledge
- 4.1 Thinking Scientifically
  - [4.1.1 Strengths & Limitations of Models](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-1-strengths-and-limitations-of-models.md)
  - [4.1.2 Symbols & Formulae to Represent Scientific Ideas](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-2-symbols-and-formulae-to-represent-scientific-ideas.md)
  - [4.1.3 Analogies in Science](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-3-analogies-in-science.md)
  - [4.1.4 Changing Models – Atomic Theory](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-4-changing-models-atomic-theory.md)
  - [4.1.5 Working Safely in the Lab](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-5-working-safely-in-the-lab.md)
  - [4.1.6 Variables](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-6-variables.md)
  - [4.1.7 Variables - Common Experiments](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-7-variables-common-experiments.md)
  - [4.1.8 Writing a Hypothesis & Prediction](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-8-writing-a-hypothesis-and-prediction.md)
  - [4.1.9 Planning an Experiment](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-9-planning-an-experiment.md)
  - [4.1.10 Maths Skills for Science - Mean](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-10-maths-skills-for-science-mean.md)
  - [4.1.11 Maths Skills for Science - Percentage & Equations](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-11-maths-skills-for-science-percentage-and-equations.md)
  - [4.1.12 Drawing Scientific Apparatus](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-12-drawing-scientific-apparatus.md)
  - [4.1.13 Observation & Measurement Skills](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-13-observation-and-measurement-skills.md)
  - [4.1.14 Types of Data](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-14-types-of-data.md)
  - [4.1.15 Graphs & Charts](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-15-graphs-and-charts.md)
  - [4.1.16 Bias in Science](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-16-bias-in-science.md)
  - [4.1.17 Conclude & Evaluate](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-17-conclude-and-evaluate.md)
  - [4.1.18 End of Topic Test - Scientific Thinking](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-18-end-of-topic-test-scientific-thinking.md)
  - [4.1.19 End of Topic Test - Experimenting](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-1-19-end-of-topic-test-experimenting.md)
- 4.2 Applications of Science & its Implications
  - [4.2.1 Developing Scientific Knowledge through Technology](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-2-1-developing-scientific-knowledge-through-technology.md)
  - [4.2.2 Developing Technology through Science](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-2-2-developing-technology-through-science.md)
  - [4.2.3 Ethical, Social, Economic, Political Implications](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-2-3-ethical-social-economic-political-implications.md)
  - [4.2.4 End of Topic Test - Applications of Science](https://senecalearning.com/en-gb/revision-notes/ks3/science/science-ks3/4-2-4-end-of-topic-test-applications-of-science.md)