Across
- 2. Gas that's maded naturally, under the earth
- 6. A source of energy made from falling water
- 8. Energy found inside the nucleus of an atom
- 9. The ability of someone or something to do work
- 12. Lakes of oil deep in the earth produced by fossils
- 13. Fossilized forms of energy
- 14. Energy made from sources that don't run out
- 15. Energy in motion
Down
- 1. A source of electricity made from moving air
- 3. Potential energy that is dependent on gravity
- 4. Stored energy waiting to be used
- 5. Thin plates that turn solar energy directly into electricity
- 7. Energy that doesn't produce chemicals and waste
- 10. A source of energy from the sun
- 11. An energy source made up of dead plants that turned into carbon