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