Across
- 4. an energy resource that is not replaced naturally
- 7. an energy resource that is easily replaced by natural methods
- 11. electrical energy generated by the movement of water
- 12. thermal energy that originates deep within the earth's interior
- 13. energy produced by the sun
- 14. the ability to do work
Down
- 1. energy produced by nuclear reactions
- 2. a fuel that has formed from the remains of plants and animals that lived in the past
- 3. chemical potenial energy obtained from renewable organic materials
- 5. Stored energy that can be used later
- 6. energy that an object possesses due to its motion
- 8. energy from the wind; can be used to turn turbine blades that are attached to generators
- 9. mechanical energy in rising and falling tides
- 10. the sum of the kinetic energy and all the forms of potential energy in a system