Chapter Three Crossword puzzle

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Across
  1. 3. the force that makes objects fall toward earth's center
  2. 5. a very small fragment of a much larger object
  3. 9. heat transfer between materials that are touching
  4. 10. a group of parts that work together as a whole
  5. 11. contains all of Earth's water
  6. 12. transfer of energy that is carried in rays
  7. 13. uppermost mantle
  8. 15. has three main parts
Down
  1. 1. a layer of hot rock
  2. 2. a rock that is a light color and has coarse grains
  3. 4. a natural power that acts on an object
  4. 6. the thin envelope of gases that forms Earth's outermost layer
  5. 7. heat transfer by the movement of a fluid
  6. 8. soft layer below the lithosphere
  7. 14. a dark fine grained rock