Across
- 3. rods made of U-235
- 6. energy from the sun
- 7. compounds made of oil
- 8. the splitting of an atom's nucleus
- 10. a change from one form of energy to another
- 13. another name for oil
- 14. a substance that provides energy
- 16. fuel rods generate too much heat that they start to melt
- 17. a factory where crude oil is heated and separated
- 18. energy-rich substances
- 19. a layer of material that traps air to block the transfer of heat
- 20. chemicals that have carbon and hydrogen atoms
Down
- 1. electricity made by flowing water
- 2. made of metal cadmium
- 4. made from alcohol and gasoline
- 5. the part of the nuclear reactor where nuclear fission occurs
- 9. reducing energy use
- 11. the central core of an atom
- 12. made from living things
- 15. the percentage of energy that is actually used to perform work