Earth Day Crossword !

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Across
  1. 1. The branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
  2. 3. The total variety of all living organisms on Earth, between species, and across ecosystems!
  3. 4. Decayed organic matter used to improve soil quality!
  4. 7. Animal or plant species that thrive in heavily developed, highly urbanized areas! (Like rats!)
  5. 8. What do we celebrate today!
Down
  1. 1. The surrounding or conditions in which a person, animal, or plant lives or operates.
  2. 2. Species that have a disproportion large influence on the environment!
  3. 5. The color of a four-leaf clover !
  4. 6. Organic material derived from plants, animals, and microorganisms!