Across
- 2. separation of atoms
- 3. energy from organic material
- 4. most desirable type of coal
- 10. resource that has a finite amount on earth
- 11. energy produced from earth's crust
- 12. cleanest of the three fossil fuels
- 13. liquid petroleum removed from the ground
- 14. compressed biological material from 50-350 mya
- 15. energy transferred from the sun
Down
- 1. fastest growing source of electricity
- 5. turned by steam to generate electricity
- 6. mined for the energy source for nuclear power
- 7. used to power most of our vehicles
- 8. resource that is abundant
- 9. energy produced by water
- 13. dirtiest fossil fuel