Across
- 4. can be replaced in a short amount of time
- 7. oil is mainly used for
- 8. cut down trees for fuel
- 10. the dam for hydropower builds up
- 11. are very tall and loud
- 12. substance that provides energy
- 13. nuclear fusion is very
- 16. chemical compounds that contain hydro and carbon atoms
- 17. lots of wind turbines together
- 19. crude oil is heated and put into other products
- 20. wind is used
- 22. Biomass is not
- 25. comes from the earth's core
- 27. biomass increased global
- 28. turbine is powered by rushing water
- 29. water and solar energy is also
- 30. solar energy won't work if the ___does not shine
Down
- 1. Dams stop fish from going up
- 2. hard to find spaces for them
- 3. compounds made from oil
- 5. solar energy is
- 6. reducing energy use
- 9. a layer that keeps either hot or cold air in
- 14. Light and heat given off by the sun
- 15. can't get energy when it's night time
- 18. When the rod gets so hot it starts to melt
- 21. they have oxygen and ________ to make hydrogen fuel cells
- 23. to save energy you can turn of the
- 24. water produces no green house
- 26. coal is used seventy on percent%of electricity's