Ecosystem System

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 5. Living things like dogs and birds (7)
  2. 6. An abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous ___ (6)
  3. 8. A mammal with wings formed from its forelimbs. (3)
  4. 9. Tall plant with a trunk and branches (4)
  5. 11. A system formed by the interaction of a community of organisms with their physical environment (9)
  6. 14. Scaly swimmer that breathes through gills (4)
  7. 15. Gas in the air that we need to breathe (6)

Down

  1. 1. Clear liquid we drink that falls as rain (5)
  2. 2. Any of several herbivorous leaping marsupials of Australia and New Guinea having large powerful (8)
  3. 3. Study of the natural world through experiments (7)
  4. 4. What we eat to get energy and grow (4)
  5. 7. Long stream of water flowing to the sea (5)
  6. 8. Warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings (4)
  7. 10. Protective covering that provides protection from the weather (7)
  8. 12. The part of the earth's surface consisting of humus and disintegrated rock (4)
  9. 13. Any of various tailless stout-bodied amphibians with long hind limbs for leaping (4)