Across
- 1. the Earth's main source of energy
- 3. name means "rock oil"
- 6. the ability to cause change
- 7. an energy source that can be used instead of fossil fuels
- 10. energy resources made from carbon rich plant and animal remains, coal, natural gas, and petroleum
Down
- 2. an energy source that cannot be produced, grow, or restored as fast as it is used
- 4. a source of energy that can easily be reproduced by nature
- 5. an available source of stored energy that humans can use
- 8. fossil fuel that is trapped in rock formations
- 9. a sedimentary rock formed from the remains of dead plants at the bottom of ancient plants