Mountains

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Across
  1. 2. only just a small amount, not at all
  2. 4. large sections of the earth's crust that move independently
  3. 5. hot gases and melted rock from deep within Earth find their way up to the surface
  4. 7. a slow moving mass or river of ice formed by the accumulation of snow on mountains
Down
  1. 1. the planet's outermost, solid, and relatively thin layer, composed of rocks and minerals
  2. 3. gradual destruction of something by wind, water or other natural agents
  3. 5. far beyond what is usual or reasonable
  4. 6. a place giving temporary protection from bad weather or danger