Plate tectonics crossword

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Across
  1. 1. when a plate with a lower density sink
  2. 6. where two plates slide past eachother
  3. 7. what moves the plates
  4. 8. boiling hot liquid under the earth's surface
Down
  1. 2. the plates that cover the earth
  2. 3. where two plates seperate
  3. 4. this forms at a divergent plate boundary
  4. 5. where two plates collide