geography

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Across
  1. 2. a natural feature of the earths surface
  2. 4. a sudden movement of the earths crust caused by releasing of pressure
  3. 5. a very light and porous volcanic rock
  4. 6. the buckling of rock along lines of physical weakness
  5. 8. molten rock below the earths surface
Down
  1. 1. the breaking down of rocks into smaller pieces
  2. 3. the accumulation of sediments by the action of erosion agents
  3. 7. molten rock at the earths surface