plate tectonics

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Across
  1. 5. boundary between two plates that are sliding past each other
  2. 6. the process by which Earth's crust breaks apart
  3. 7. a vent on the earths surface where magma and gases are expelled
Down
  1. 1. a boundary where two plates are moving apart - hint: create new crust
  2. 2. a theory proposed by Alfred Wegener that explains how large pieces of land called plates move and change shape of the earth.
  3. 3. the solid, outer layer of the earth that consists of the crust and the upper part of the mantle
  4. 4. boundary between two colliding plates - keywords: ocean trench