Plate tectonics

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Across
  1. 4. a continuous series of undersea volcanic mountains
  2. 6. A crack caused by plate tectonics
  3. 8. a blast of heat from the core
  4. 9. boundary A tectonic plate that separates
  5. 10. boundary A tectonic plate that grates next to another one
Down
  1. 1. a process that causes plates to move
  2. 2. series of volcanoes under the sea
  3. 3. hot molten rock
  4. 5. boundary A plate that combines with one another
  5. 7. an oceanic trench that can be as big as a continent