 There are different types of energy:
- Heat (thermal)
.
- Kinetic (movement)
.
- Light
.
- Sound
.
- Electrical
.
- Chemical (stored in food
and fuels)
.
- Nuclear (stored in nuclei of
atoms)
.
- Gravitational
potential (stored in raised objects)
.
- Elastic potential (stored in
stretched or squashed objects)
Energy is measured in joules (J).
Most energy sources on Earth originate from the Sun.
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