Energy Stores & Pathways
Science: KS3, topic 3.1.1
Energy Stores and Pathways
Energy can be stored or transferred via pathways. Energy is measured in Joules (J).
Energy stores
- Energy is stored in eight ways:
- Kinetic energy (moving objects).
- Elastic energy (stretched or squeezed objects).
- Thermal internal energy (in warm objects).
More energy stores
- Energy is stored in eight ways:
- Chemical energy (energy from a fuel).
- Nuclear energy (radioactive objects).
- Magnetic energy (magnetic objects).
Further energy stores
- Energy is stored in eight ways:
- Electrostatic energy (charged objects).
- Gravitational potential energy (lifted objects).
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Energy pathways
- Energy moves by four pathways:
- Mechanically (moving energy over a distance by force).
- Electrical (moving electrons in a current).
Heating and radiation
- Radiation (such as lightwaves, radio waves and microwaves can be energy pathways).
- Heating
- Heat moves from hotter to colder places if there is a temperature difference.
Test yourself on Energy Stores & Pathways
Which of these is NOT an energy pathway?
What is a mechanical energy transfer?
A toaster warms bread using an electric current that flows through its heating wires. Which energy pathway transfers the energy through the wires?
A metal spoon at 90 °C is placed next to a glass of water at 10 °C. Which object receives heat energy?