Across
- 4. conservation Reducing energy use
- 8. Traps air to help block the transfer of heat
- 11. A resource that is either always available or is naturally replaced in a relatively short time
- 12. Oil is separated into fuels
- 14. The process of burning a fuel
- 16. vessel The part of a nuclear reactor where nuclear fission occurs
- 17. Uses the most electricity in the U.S
- 18. rod A cadmium rod used in a nuclear reactor to absorb neutrons from fission reactions
- 19. How wind, flowing water and tides are used to produce electricity
- 20. Chemicals that contains carbon and hydrogen
- 21. Liquid fossil fuel oil
- 22. compound made from oil
- 24. The percentage of energy that is used
- 25. fuels An energy-rich substance formed from the remains of organisms
- 26. fuel Fuel made from living things
Down
- 1. Coming together
- 2. Energy Original source of the energy in wind and flowing water
- 3. A natural resource that is not replaced in a useful time frame
- 5. energy Heat from Earth's interior
- 6. Power Source that uses the most coal in U.S
- 7. Power Electricity produced by flowing water
- 9. Breaking apart
- 10. Mixing alcohols to gasoline makes it
- 13. The central core of an atom that contains protons and neutrons
- 15. Uses the most oil in the U.S
- 23. A dangerous condition in which fuel rods inside a nuclear reactor melt
- 25. A substance that provides energy