Across
- 2. about 2.2% of the USA's energy
- 3. fossil fuels are formed by ___ when pressure and heat is added
- 5. what we dig for in pockets of rock
- 11. cannot be replenished in a short period of time takes millions and billions of years
- 12. the energy conservations that occur when a car engine burns gasoline
- 14. wood, manure, food wastes, and plant parts that can be used as fuels
- 16. a factory that crude oil is heated and separated into fuels
- 19. about 13% of all energy comes from
- 22. what you put in your walls to keep the cold/warm air in
- 23. the splitting of an atoms nucleus into two smaller nuclei
- 25. 81% of our total energy is from this
- 26. the biggest type of fossil fuel we use
- 27. fossil fuels are renewable or nonrenewable?
- 28. the biggest use of oil in the Usa is?
Down
- 1. replenishes in a relatively short period of time
- 4. the original source of energy In wind and flowing water
- 6. energy produced by flowing water
- 7. two nuclei are combined to form one larger nucleus
- 8. petrochemicals are mainly used to make plastics cosmetics and
- 9. about 20% of all energy is from this
- 10. chemicals compounds that contain carbon and hydrogen atoms that make fossil fuels
- 12. which lightbulb uses less energy incandescent or compact flourescent
- 13. adding the mixture of alchohol to gasoline forms and can be used as car fuel
- 15. heat from the earth's interior
- 17. fuel rods generate so much heat they start to melt
- 18. compounds that are made from oil
- 20. the biggest use of coal in the usa is
- 21. using your energy smarter
- 24. a substance that provides energy
- 29. this is about a quarter of the energy we use