Ecosystems: The Role Of Abiotic Factors

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This accompanies a Discovery video
Crossword Hints
  1. oxygen is used up in this energy releasing process of __________ respiration.
  2. This part of the soil is made from decayed organic materials.
  3. This process occurs when water vapor becomes liquid water
  4. This is a term for a liquid that can dissolve things
  5. This process is said to have taken place if every member of a species has died out.