Across
- 6. Nonrenewable source of energy formed from remains of trees and other plants that grew in swamps hundred million years of ago
- 7. Part of nuclear reactor where nuclear fission occurs
- 9. chemicals made from oil
- 13. Splitting of an atom's nucleus into the smaller nuclei
- 14. Energy rich substances formed from the remains of dead organisms
- 17. These generate electricity by digging wells into the earth and collect the Earth's heat
- 20. Where rows of giant mirrors capture the sun's rays to capture heat
- 21. This is when the fuel rods generate too much heat
- 22. Energy from the sun
- 26. Electricity produced by flowing water
- 27. practice of saving energy
- 28. Percentage of energy that is actually used to perform
- 29. fuel made from living things
Down
- 1. Factory where crude oil is produced
- 2. used to slow down chain reactions when vessel gets too hot
- 3. this is what coal is mostly used for in the U.S
- 4. Substance that provides energy
- 5. Process of burning a fuel
- 8. Another name for oil
- 10. A change from one form of energy to another is called this
- 11. Original source of the energy in wind and flowing water
- 12. This is what oil is mainly used for in the United States
- 13. Central core of an atom that contains the protons and neutrons is called this
- 15. Layer of material that traps air to help block the transfer of heat between the air inside and outside a building
- 16. This is the combining of two atomic nuclei to produce a single larger nucleus
- 18. Chemical compounds that contain carbon and hydrogen atoms
- 19. gasoline and this mix to produce gasohol
- 23. These are rods in the reactor vessel
- 24. Heat from Earth's interior
- 25. Geothermal heat pumps transfer this from the ground in winter