cross word puzzle-nature

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Across
  1. 1. a large area of land covered with sand
  2. 4. a large amount of water covering an area
  3. 7. where many trees grow
  4. 8. a mountain with a large opening at the top through which gases and lava
  5. 9. a violent storm with very strong winds which move in a circle.
  6. 11. the land beside or near to the sea or ocean
  7. 12. the top layer of the earth in which plants, trees, etc. grow
  8. 13. a sudden, violent shaking of the earth's surface
  9. 15. a field covered in grass
Down
  1. 2. a slide of large masses of snow and ice
  2. 3. a steep high face of rock
  3. 5. a long time when there is little or no rain
  4. 6. a bend or curve, as in a stream or river
  5. 8. an area of low land between hills or mountains
  6. 9. an extremely large wave in the sea
  7. 10. synonym of sea
  8. 14. part of a river where the water flows very fast