5.1.2

Contact & Non-Contact Forces

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Contact & Non-Contact Forces

Forces can happen by contact between two things. Forces can also happen when there is no contact.

Contact forces

Contact forces

When you push a rubber across a table, the force is from the contact between your hand and the rubber.
- This is a force caused by contact between you and the rubber.

Non-contact forces

Non-contact forces

Magnets have a force that does NOT need direct contact.
Magnets are made from a metal called iron.
The force created by a magnet is 'magnetism'.
- Magnetism is a magnetic force.

Using magnetic forces

Using magnetic forces

Magnets can push or pull each other.
Magnets can push or pull other objects.
Magnets can push or pull without touching.

Magnetic materials

Magnetic materials

Some materials can be pushed or pulled by magnets.
- Materials that can be pushed or pulled by magnets are called magnetic.
Some materials cannot be pushed or pulled by magnets.
- Materials that cannot be pushed or pulled by magnets are called non-magnetic.

1

Year 3: Plants

1.1

Types of Plants

1.1.1Flowering & Non-flowering Plants

1.2

Parts of a Plant

1.2.1Roots 1.2.2What do Roots do?1.2.3Stem 1.2.4Leaves 1.2.5How Leaves Make Food 1.2.6Flowers

1.3

Pollination

1.3.1Pollination 1.3.2Pollination by Insects 1.3.3Pollination by the Wind

1.4

Seeds

1.4.1Types of Seeds 1.4.2Dispersing Seeds

2

Year 3: Animals (Including Humans)

2.1

Food

2.1.1The Need for Food 2.1.2Food Groups 2.1.3Carbohydrates 2.1.4Proteins 2.1.5Dairy 2.1.6Fruit & Vegetables 2.1.7Fats 2.1.8Junk Food

2.2

Skeletons & Muscles

2.2.1Skeletons & Muscles 2.2.2Healthy Bones

3

Year 3: Rocks

3.1

Rocks on Earth

3.1.1Rocks 3.1.2Fossils

4

Year 3: Light

4.1

What is Light?

4.1.1Light as Energy 4.1.2Reflections 4.1.3Sunlight 4.1.4Shadows

5

Year 3: Forces & Magnets

5.1

Forces

5.1.1What is a Force?5.1.2Contact & Non-Contact Forces 5.1.3Testing Magnetic Materials 5.1.4Attracting & Repelling Magnets 5.1.5Uses of Magnets

6

Year 4: Living Things & Their Habitats

6.1

Grouping Animals

6.1.1Biodiversity & Classification 6.1.2Grouping Animals

6.2

Vertebrates

6.2.1Vertebrates 6.2.2Mammals 6.2.3Reptiles 6.2.4Fish 6.2.5Amphibians 6.2.6Birds

6.3

Invertebrates

6.3.1Invertebrates 6.3.2Insects 6.3.3Spiders 6.3.4Slugs & Snails 6.3.5Worms

6.4

Grouping Plants

6.4.1Grouping Plants 6.4.2Flowering Plants 6.4.3Non-Flowering Plants

6.5

Classification Keys

6.5.1Classification Keys

6.6

Environmental Change

6.6.1Positive Impact of Humans on the Environment 6.6.2Negative Impact of Humans: Deforestation 6.6.3Negative Impact of Humans: Litter 6.6.4Negative Impact of Humans: Overpopulation

7

Year 4: Animals, Including Humans

7.1

Teeth

7.1.1Why Do We Need Teeth?7.1.2'Baby' Teeth 7.1.3Adult Teeth 7.1.4Incisors 7.1.5Canines 7.1.6Premolars 7.1.7Molars

7.2

Digestion

7.2.1What is Digestion?7.2.2The Digestive System - The Mouth 7.2.3The Digestive System - The Stomach 7.2.4The Digestive System - The Small Intestines 7.2.5The Digestive System - The Large Intestines

7.3

Food Chains

7.3.1What are Food Chains?7.3.2Producers, Predators & Prey 7.3.3Herbivores & Carnivores

8

Year 4: States of Matter

8.1

The 3 States of Matter

8.1.1States of Matter 8.1.2Changes of State

8.2

The Water Cycle

8.2.1The Water Cycle 8.2.2Evaporation at Different Temperatures

9

Year 4: Sound

9.1

How Do I Hear?

9.1.1What is Sound?9.1.2Sound Travels to Your Ear

9.2

Pitch

9.3

Volume

9.3.1Volume 9.3.2How Distance Affect Volume

10

Year 4: Electricity

10.1

Uses of Electricity

10.1.1What Uses Electricity?

10.2

Conductors & Insulators

10.2.1Electrical Conductors 10.2.2Electrical Insulators

10.3

Making Circuits

10.3.1What is a Circuit?10.3.2Complete Circuits 10.3.3Electrical Safety

Jump to other topics

1

Year 3: Plants

1.1

Types of Plants

1.1.1Flowering & Non-flowering Plants

1.2

Parts of a Plant

1.2.1Roots 1.2.2What do Roots do?1.2.3Stem 1.2.4Leaves 1.2.5How Leaves Make Food 1.2.6Flowers

1.3

Pollination

1.3.1Pollination 1.3.2Pollination by Insects 1.3.3Pollination by the Wind

1.4

Seeds

1.4.1Types of Seeds 1.4.2Dispersing Seeds

2

Year 3: Animals (Including Humans)

2.1

Food

2.1.1The Need for Food 2.1.2Food Groups 2.1.3Carbohydrates 2.1.4Proteins 2.1.5Dairy 2.1.6Fruit & Vegetables 2.1.7Fats 2.1.8Junk Food

2.2

Skeletons & Muscles

2.2.1Skeletons & Muscles 2.2.2Healthy Bones

3

Year 3: Rocks

3.1

Rocks on Earth

3.1.1Rocks 3.1.2Fossils

4

Year 3: Light

4.1

What is Light?

4.1.1Light as Energy 4.1.2Reflections 4.1.3Sunlight 4.1.4Shadows

5

Year 3: Forces & Magnets

5.1

Forces

5.1.1What is a Force?5.1.2Contact & Non-Contact Forces 5.1.3Testing Magnetic Materials 5.1.4Attracting & Repelling Magnets 5.1.5Uses of Magnets

6

Year 4: Living Things & Their Habitats

6.1

Grouping Animals

6.1.1Biodiversity & Classification 6.1.2Grouping Animals

6.2

Vertebrates

6.2.1Vertebrates 6.2.2Mammals 6.2.3Reptiles 6.2.4Fish 6.2.5Amphibians 6.2.6Birds

6.3

Invertebrates

6.3.1Invertebrates 6.3.2Insects 6.3.3Spiders 6.3.4Slugs & Snails 6.3.5Worms

6.4

Grouping Plants

6.4.1Grouping Plants 6.4.2Flowering Plants 6.4.3Non-Flowering Plants

6.5

Classification Keys

6.5.1Classification Keys

6.6

Environmental Change

6.6.1Positive Impact of Humans on the Environment 6.6.2Negative Impact of Humans: Deforestation 6.6.3Negative Impact of Humans: Litter 6.6.4Negative Impact of Humans: Overpopulation

7

Year 4: Animals, Including Humans

7.1

Teeth

7.1.1Why Do We Need Teeth?7.1.2'Baby' Teeth 7.1.3Adult Teeth 7.1.4Incisors 7.1.5Canines 7.1.6Premolars 7.1.7Molars

7.2

Digestion

7.2.1What is Digestion?7.2.2The Digestive System - The Mouth 7.2.3The Digestive System - The Stomach 7.2.4The Digestive System - The Small Intestines 7.2.5The Digestive System - The Large Intestines

7.3

Food Chains

7.3.1What are Food Chains?7.3.2Producers, Predators & Prey 7.3.3Herbivores & Carnivores

8

Year 4: States of Matter

8.1

The 3 States of Matter

8.1.1States of Matter 8.1.2Changes of State

8.2

The Water Cycle

8.2.1The Water Cycle 8.2.2Evaporation at Different Temperatures

9

Year 4: Sound

9.1

How Do I Hear?

9.1.1What is Sound?9.1.2Sound Travels to Your Ear

9.2

Pitch

9.3

Volume

9.3.1Volume 9.3.2How Distance Affect Volume

10

Year 4: Electricity

10.1

Uses of Electricity

10.1.1What Uses Electricity?

10.2

Conductors & Insulators

10.2.1Electrical Conductors 10.2.2Electrical Insulators

10.3

Making Circuits

10.3.1What is a Circuit?10.3.2Complete Circuits 10.3.3Electrical Safety

Practice questions on Contact & Non-Contact Forces

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1
What is a non-contact force?Multiple choice
2
Which of these is true about magnets?Multiple choice
3
What do we call objects that can be pushed and pulled by magnets?Multiple choice

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What is a Force?

Testing Magnetic Materials