Across
- 6. splitting of an atoms nucleus into two smaller nuclei
- 9. energy that holds particles together
- 12. energy nearly always available
- 13. extraction of a mineral by removing a strip
- 15. generates electricity
- 16. digging shafts deep into the ground
- 19. deposits of moist sand and clay
- 20. fuel rods produced so much heat that they melted
- 21. radioactive material left over
- 22. energy made available by electric charge
- 23. small nucli of lightweight elements
Down
- 1. fuel burns it combines rapidly with oxygen
- 2. exposed rock surfaces react with oxygen
- 3. how much of the energy put into a system
- 4. is an icelike solid
- 5. dark liquid fossil fuel
- 7. chemical compounds that are derived from oil
- 8. practice of reducing energy use to meet those goals
- 10. energy an object has due to position or shape
- 11. energy that an object has due to its motion
- 14. is the ability to do work
- 17. energy cannot be replaced
- 18. rock filled with a mixture of hydrocarbons