Geological change

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Across
  1. 3. Giant slabs of Earth's crust that slowly drift and crash into each other
  2. 4. The process of one plate sinking beneath another
  3. 7. A type of boundary where plates slide past each other without making or destroying crust
  4. 9. A thinner, denser plate found under the sea
Down
  1. 1. A type of boundary where one plate dives under another and melts away
  2. 2. A thicker, lighter plate that forms the land we live on
  3. 5. A type of boundary where two plates move apart and new crust is born
  4. 6. A boundary where two continental plates crash and form mountains
  5. 8. Hot, melted rock found beneath Earth's surface