Mountains and Volcanoes

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Across
  1. 3. An opening in the Earth's crust through which molten rock, rock fragments and hot gases erupt.
  2. 6. A dense cloud of superhot gases and rock fragments flowing downhill as fast as 100 mph.
Down
  1. 1. A _____ mountain forms as continental crust crumples and bends into folds.
  2. 2. When blocks of rock move up or down along normal fault lines, ______ mountains are formed.
  3. 4. A hot spring where water shoots into the air.
  4. 5. Rain that contain large amounts of acid is _____ rain.
  5. 7. Magma that has reached the earth's surface