Chapter 17

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Across
  1. 3. Increased pressure or injections needed to remove oil
  2. 4. Dark liquid fossil fuel made up mostly of hydrocarbon
  3. 6. Primarily methane gas with small amounts of other gases mixed in
  4. 7. Underground shafts are dug to access coal under Earth’s surface.
  5. 10. Cannot be replaced in a reasonable time
  6. 12. Energy associated with an object's motion
  7. 13. Kinetic energy of atoms and molecules
  8. 14. Potential energy stored in molecular bonds
  9. 15. Joining two atomic nuclei to form one nucleus
  10. 17. Nearly always available or replaceable in a relatively short time;
  11. 18. Energy associated with an object's position
Down
  1. 1. Potential energy stored by forces that hold atomic nuclei together
  2. 2. Kinetic energy that travels as waves
  3. 5. Oil flows out of the well, because it is already under pressure
  4. 8. Energy associated with the motion and position of an object; can be kinetic or potential
  5. 9. Overlying rock and soil are removed to access coal (safer for miners).
  6. 11. Associated with electric charges; can be kinetic or potential
  7. 16. Formed from plant remains subjected to high heat and pressures over millions of years