Plate Tectonics

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Across
  1. 3. combination of continental, oceanic crust, and outermost crust of mantle
  2. 5. plate boundary plates move apart in opposite directions
Down
  1. 1. physical, chemical, and biological processes that break down rocks
  2. 2. plate boundary plates are pushed together by internal forces
  3. 4. Tectonics 15 huge rigid plates that move