Across
- 3. keeps homes warm
- 6. a reliable source of energy that uses big turbines that spin
- 7. panels that use the sun to trap and store electricity
- 9. chemical compound that contains carbon and hydrogen
- 10. hydropower is __________
- 15. comes from farmwood crops farms animal waste
- 16. another name for oil
- 18. E=mc2
- 20. catching steam and heated water for energy
- 22. what happens if we use nuclear fusion as a power source
- 24. rocked fuel is main use of __________________
- 25. what coal is mostly used to make
- 27. adding alcohol to gasoline
- 28. getting energy from water
- 29. mixture of methane and other gases
Down
- 1. hydrogen_______ cleanly
- 2. sources of hydroelectric power
- 4. what oil is mainly used for
- 5. energy rich substances
- 8. original source of energy in wind and flowing water
- 11. when oil is heated into fluid
- 12. percentage of coal mined and exported from US to other countries
- 13. formed from paint remains
- 14. compounds made from oil
- 17. the change of one form of energy to another
- 19. energy released by _________
- 21. three types of natural gas
- 23. energy rich substances that are formed from the remains of animals
- 26. a renewable source of energy that uses the sun