Across
- 2. engine that changes mechanical energy to electricity
- 4. waste from a nuclear power plant
- 7. plant materials and animal waste used for fuel
- 8. resource that is constantly renewed
- 10. resource that cannot be replaced when used up
- 12. energy from the sun
Down
- 1. power generated by the force of water
- 2. energy from the heat inside Earth
- 3. energy given off by the nucleus of an atom
- 5. a known deposit of energy resources
- 6. formed from the remains of plants and organisms
- 9. something that is given off or sent out
- 11. hot, liquid rock inside a volcano