Across
- 1. another name for oil
- 6. made of metal cadmium
- 7. fuel rods generate too much heat that they start to melt
- 9. energy rich substances formed from dead organisms
- 11. made from living things
- 12. made from gasoline and alcohol mixing
- 14. the part of the nuclear reactor where nuclear fission occurs
- 17. electricity made by flowing water
- 18. layer of material that traps air
- 19. compounds made from oil
- 20. is a substance the provides energy
Down
- 2. the percentage of energy that is used
- 3. rods made of u-235
- 4. burning of fossil fuels
- 5. intense heat from Earth's interior
- 8. a change from one form of energy to another
- 10. energy from the sun
- 13. the splitting of an atom's nucleus into two mini nuclei
- 15. the central core of an atom
- 16. chemicals that contain hydrogen and carbon atoms