Plate Tectonics Crossword

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Across
  1. 3. determines distance of under water objects
  2. 6. thinnest layer of the earth
  3. 7. section that moves over the asthenosphere
Down
  1. 1. amount of mass given in a space
  2. 2. layer of hot material between earths crust and core
  3. 4. make up of minerals
  4. 5. break in earths crust