Across
- 1. gas, used in home heating that comes from underground deposits
- 5. a fossil fuel found beneath the earth. It is mined and used as a fuel to generate electricity.
- 9. energy sources that are replenished by nature
- 10. energy from a physical force
- 13. coal, oil and natural gas that developed over millions of years from decayed plants and animals.
- 15. a fossil fuel that is extracted from underground.
- 17. the ability to do work
- 19. materials that cannot be replaced by nature
- 20. the energy of motion
Down
- 2. to change from one form to another
- 3. the energy in the vibrations that cause sound
- 4. energy produced by the sun
- 6. the gravitational energy in flowing water
- 7. energy released by chemical reactions
- 8. a plant material such as wood
- 11. heat that is transferred from the Earth’s hot core
- 12. the energy stored in a body
- 14. form of energy that can be transformed into other forms such as light
- 16. energy from a light source, such as the sun
- 18. the energy contained in warm objects due to their warmth.