Nature

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Across
  1. 4. (Clue: The vast body of salt water covering most of the Earth)
  2. 5. (Clue: A gentle, refreshing wind (Anagram))
  3. 7. R (Clue: A violent disturbance of the TRINEW (Clue: The coldest season of the year)
  4. 9. (Clue: A thick, overgrown tropical forest)
Down
  1. 1. (Clue: A mountain with a crater that spews lava (Anagram))
  2. 2. (Clue: A dry, barren area of land)
  3. 3. (Clue: A dense growth of trees (Anagram))
  4. 6. (Clue: A colorful plant bloom (Anagram))
  5. 8. (Clue: A large celestial body in orbit around a star) IVRER (Clue: A large natural stream of water flowing to the sea)