Nature

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Across
  1. 1. a high area of land with a very steep side
  2. 6. an area of tall, mostly evergreen trees
  3. 7. large, thick masses of ice that form on land when fallen snow gets compressed into ice over many centuries
Down
  1. 1. dark, hollow and form underground or on hillside
  2. 2. a small area of still, fresh water
  3. 3. a low area of land between hills or mountains
  4. 4. the land along a sea
  5. 5. a small, narrow river