NATURAL WORLD

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Across
  1. 4. A large landform that rises above the surrounding land.
  2. 5. A barren area of landscape where little precipitation occurs and, consequently, living conditions are hostile for plant and animal life.
  3. 6. a widely distributed and diverse group of fully aquatic placental marine mammals.
  4. 7. A canine native to the wilderness.
  5. 10. A body of water meandering from the mountains to the ocean.
  6. 11. An area filled with water, that is surrounded by land.
Down
  1. 1. a body of saline water that composes much of a planet's hydrosphere.
  2. 2. A bloom or blossom.
  3. 3. a place where water flows over a vertical drop or a series of steep drops in the course of a stream or river.
  4. 8. a large area dominated by trees.
  5. 9. An evergreen plant with an elongated stem, or trunk, supporting branches and leaves in most species.