Avalanches and Landslides Crossword Puzzle

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Across
  1. 3. the downward movement of a large chunk of solid snow
  2. 5. an opening in the earth's surface through which hot rocks and gases can escape
  3. 10. the downhill movement of large amounts of rock and soil
  4. 11. filled with the maximum amount of a liquid or solid substance
  5. 12. the steep slope left behind when a landslide falls away
  6. 13. the slow, almost unnoticeable, movement of loose soil down the surface of a slope
  7. 15. to make a surface slippery
  8. 16. a violent shaking movement of the outer layer, or crust, that surrounds the earth
  9. 17. the movement down a slope of a block of rock and soil. The slumped block tilts back towards the slope
  10. 19. the violent release of steam, rocks, dust, and ash through an opening in the earth's surface
  11. 21. water that is found in rocks and soil beneath the surface
Down
  1. 1. a mixture of rocks, melting snow and ice, and the ash and dust from an erupting volcano
  2. 2. a burst of energy that is released from the center of an earthquake
  3. 4. the downward movement of a mass of ice and snow
  4. 6. a coarse rock made up of grains of sand joined together
  5. 7. the large-scale removal of trees and other vegetation
  6. 8. describes a slope that is likely to start moving downward
  7. 9. a kind of soft rock made from tiny pieces of mud and clay
  8. 14. the slipping movement of rock along one or more surfaces
  9. 18. loose solid material such as soil, mud, small pieces of rock, and
  10. 20. the rapid downhill movement of soil mixed with water