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