Chapter 17 Crossword

2. a source of energy that cannot be replaced
5. the worlds most abundant fossil fuel
7. the practice of reducing energy
10. an icelike solid that consists of molecules of methane within a crystal network
13. the ability to do work or cause a change
14. when sulfide minerals in exposed rock surfaces and react with oxygen and rain water
16. energy made by the flow of an electric charge
18. a dark liquid fossil fuel made up of hydrocarbons
20. when atoms nucleus is split into two smaller nuclei

1. a source of energy that is almost always available
3. the energy that holds protons and neutrons in the nucleus
4. radioactive material left over from the production of energy
6. deposits of moist sand and clay containing bitumen
8. the energy an object has due to its motion
9. energy that an object has due to shape or position
11. what fossil fuels put out into the air after being burnt.
12. the extraction of a mineral by removing a strip of the layers of soil and rock.
15. when small nuclei of lightweight elements are forced together to form a heavier nucleus
17. the practice of digging shafts deep into the ground to find minerals
19. rock filled with a mixture of hydrocarbons