Cycles of Matter in Ecosystems

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Across
  1. 3. Water changes from a liquid to a gas in the form of water vapor. (page 82)
  2. 4. Water falls from clouds over land and water. (page 82)
  3. 6. When it rains, water flows over Earth's surface as. (page 82)
  4. 7. Occurs when a gas changes to a liquid. (page 82)
  5. 8. The continuous movement of water between Earth's surface and the air, changing forms among the three states of matter. (page 82)
Down
  1. 1. Help recycle matter that humans throw away so the matter does not harm ecosystems. (page 87)
  2. 2. The circulation of oxygen and carbon dioxide gas. (page 84)
  3. 5. The continuous circulation of nitrogen from air to soil to organisms and back to air or soil. (page 83)