Earth Day Crossword Puzzle

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Across
  1. 4. a celestial body moving in an orbit around a star
  2. 5. the gases that surround the earth or another planet
  3. 7. a place to dispose of waste by burying it and covering it with soil
  4. 9. decayed organic material used as plant fertilizer
Down
  1. 1. the natural environment of a plant or animal
  2. 2. trash that is left lying in an open or public place
  3. 3. reduce, reuse and _________
  4. 5. the month that Earth Day is in
  5. 6. a substance introduced to an environment that has harmful or poisonous effects
  6. 8. a very large body of water