Across
- 4. liquid hydrocarbon that formed from microscopic marine organisms
- 7. energy from the sun
- 9. energy resources that can be used without the risk of running out
- 10. used faster than natural process can replace
- 11. ores, nonmetallic and building are all types of ____ resources
- 12. the most abundant fossil fuel
- 13. coal must be at least 50% ___ remains
- 16. solar cells collect and convert heat into _____
- 18. what wind farms use
- 20. what mya stands for
Down
- 1. power produced by splitting atoms
- 2. using magma or dry, hot rock inside the earth to produce power
- 3. forms from the remains of plants and animals that were buried and chemically changed mya
- 5. alcohol produced from distilled corn
- 6. electricity generated from running water over a dam
- 8. anything made of this is made with petroleum
- 14. fossil fuels are removed from the ground by ____ or pumping
- 15. burning of organic matter
- 17. this power is harnessed with the difference of high and low water levels
- 18. most common type of biomass
- 19. usually forms above oil