Across
- 5. most of coal is used for this.
- 7. fuel rods that genarate so much energy they melt.
- 11. a mixture of methane and other gases.
- 12. rods in the reactor that contain U-235.
- 14. the central core of an atom that contains protons and neutrons.
- 16. where solar energy can be converted directly into electricity.
- 17. a change from one form of energy to another.
- 19. an electricity produced by flowing water.
- 20. a machine with turbines that use wind to generate electricity.
- 22. breaking apart.
- 23. chemicals compounds that contain carbon and hydrogen atoms.
- 25. energy light and heat given off by the sun.
- 27. part of nuclear reactor where nuclear fission occurs.
- 28. another name for oil.
- 29. putting together.
Down
- 1. resources that can be replaced in a short period of time.
- 2. the percentage of energy that is used to preform work.
- 3. heat from the earth's interior.
- 4. reducing energy use.
- 6. an energy source that uses wood, plant parts, manure and food wastes as fuel.
- 8. a mixture of alcohol and gasoline.
- 9. nonrenewable energy that uses fission and fussion.
- 10. rods used to slow down the chain reactions in the reactor vessel if it gets too hot.
- 13. a factory which crude oil is heated and separated into fuel.
- 15. compounds made from oil.
- 18. energy rich substances formed from the remains of organisms.
- 21. a layer of material that traps air inside and outside a building.
- 24. a solid fossil fuel formed by plant remains.
- 26. a substance that provides energy.