Rocky Planets

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Across
  1. 2. bowl-shaped area around volcano vent
  2. 4. volcano with large, steep mountains
  3. 5. liquid magma
  4. 8. when water breaks down rocks
  5. 10. water drops sediment in new place
  6. 11. opening which allows magma to escape
  7. 13. triangular shaped deposit at mouth of river
Down
  1. 1. water picks up and moves sediment
  2. 3. molten mixture of rock, gases and water
  3. 4. large hole at top of volcano after magma chamber collapses
  4. 6. volcano with broad base and gentle slopes
  5. 7. giant cracks in Earth's surface
  6. 9. all living things on a planet
  7. 12. deep valley with steep sides, river at bottom