Across
- 5. sun has produced energy in the form of heat and light. It is considered unlimited.
- 7. material found in nature that we use
- 10. earths heat
- 11. stuff people use for cooking, heating,gas.
- 13. natural gas underground
- 14. a type of liquid used for heat, and cars.
- 15. types of fossil fuels
Down
- 1. not found in nature, and man made
- 2. moving air to create energy
- 3. made by plants and animals that is converted into energy
- 4. two main types of natural resources
- 6. captured water and turned into electricity
- 8. can be replaced or never run out
- 9. can not be replaced at the same rate being used
- 12. a type of rock used for heating