Across
- 2. what energy source killed a lot of animals?
- 3. geothermal only produce small amount of electricity true or false
- 5. what did geothermal came from?
- 8. geothermal help blank and cooling the houses.
- 10. where did solar energy come from?
- 13. what is can be produce in relatively short times?
- 14. what energy source can be made by sun, water, biomass, and fossil fuels?
- 15. how many percent did biomass get the energy from the sun?
- 16. what is oil mainly used for?
- 18. what is nuclear break a part?
- 20. what is most of the coal used for?
- 22. what can biomass may produce?
- 23. hydrogen can found in all blank things?
- 24. what is wood, plant parts, mansure, and food wastes that can be used as fuels?
- 25. geothermal is nonrenewable true or false
- 27. what power is electricity produced by flowing water?
Down
- 1. what percentage of the coal mined in the united states is exported to other countries?
- 4. what energy only mainly active in 5 states?
- 6. hydrogen fuel cell is creating by combining o2 and what?
- 7. what is reduce energy use?
- 9. what is can't produce in a short amount of times, it take billion years to produce again?
- 11. what energy is heat from earth's interior?
- 12. what is nuclear combine?
- 17. what energy is light and heat given off by the sun?
- 19. what is percentage of energy that is used to perform work?
- 21. what energy conversions occur when a car engine burns gasoline?
- 26. windmills used to saw wood or to what?