Across
- 4. when fuels contain stored chemical energy
- 7. solid fossil fuel formed by the plant remains
- 8. slow down chain reactions
- 10. light and heat given off by the sun
- 11. coming together
- 13. the percent saved
- 15. obtaining electricity through sun
- 18. something that makes energy
- 19. what most of the coal used for
- 20. saving energy
- 21. what oil is mainly used for
- 24. heat from Earth's interior
- 25. cannot be remade in short amount of time
- 27. when fuel rods generate too much heat
- 28. object that produces electricity from water
Down
- 1. object that produces electricity from wind
- 2. add gasoline and alcohol
- 3. make up fossil fuels
- 5. traps warm air inside of house
- 6. wood plants manure food wastes that can be used as fuels
- 9. factory where oil is put into products
- 12. electricity from flowing water
- 14. breaking apart
- 16. replacement of incandescent bulbs
- 17. obtaining electricity through water
- 22. compounds that come from oil
- 23. split during nuclear fission
- 26. can be remade in relatively short amount of time