Plate Tectonics Vocabulary

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Across
  1. 2. the slow process of wearing down landscapes by wind, rain and ice
  2. 5. a boundary where two plates are moving apart
  3. 8. the gradual movement of the continents across the earth's surface
  4. 10. the formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges
  5. 12. a mixture of molten rock and gases that is below the Earth's surface
Down
  1. 1. a thick plate containing a continent
  2. 3. the process where a tectonic plate sinks below another tectonic plate
  3. 4. cracks in the crust between tectonic plates
  4. 6. a boundary where two plates slide by each other
  5. 7. a boundary where two plates collide
  6. 9. molten rock which has come out of the Earth usually at a volcano
  7. 11. a thin plate which is covered by oceans