ch. 17 vocab

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Across
  1. 4. deposit of moist sand and clay that can be mined to exact bitumen
  2. 7. compund derived from oil that is used to make products
  3. 8. a liquid fossil fuel made up mostly of hydrocarbons
  4. 10. rock that contains hydrocarbons
  5. 13. expression of how much of the enrgy put into a system actually does useful work
  6. 14. an icelike solid thatcan consists of molecules of methane within a crystal network of water molecules
  7. 15. type of mining pollution that occurs when oxygen and rainwater react with newly exposed rock that contains iron sulfide
  8. 16. burning :the chemical reaction when fuel combines rapidly with oxygen
Down
  1. 1. stored energy
  2. 2. the energy produced by motion
  3. 3. vertical shafts are are dug deep into the ground
  4. 5. energy that can be restored
  5. 6. energy prouced by the flow and interactions of electrons
  6. 9. reducing energy use to prolong the supply of fossil fuels
  7. 11. resource that cannoy be replaced
  8. 12. which layers of surface soil and rock are removed from large areas