MS Science Week 2 Vocabulary: Cycles of Matter Crossword Puzzle

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Across
  1. 3. the release of excess nutrients ( usually nitrogen) into a body of water; causes algae to grow excessively
  2. 5. the continual movement of an element, such as carbon or nitrogen, between Earth's organisms and the environment
  3. 8. process of converting carbon dioxide, water, and light energy to glucose and oxygen; part of the carbon cycle
  4. 9. the process in which bacteria change nitrogen gas into compounds that other organisms can use
  5. 10. the transformation of ammonia into nitrates and nitrites by bacteria
Down
  1. 1. the continuous movement of nitrogen through Earth's systems
  2. 2. process of converting glucose and oxygen into carbon dioxide, water, and chemical energy; part of the carbon cycle
  3. 4. the conversion of nitrates and ammonium molecules in soil back into nitrogen gas
  4. 6. burning, especially carbon-based material
  5. 7. the continuous movement of carbon through Earth's systems