Quiz 7 Review

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Across
  1. 1. this type of activity in the phosphorus cycle starts when people mine for this element
  2. 4. other than phosphorus and potassium, this nutrient is included in fertilizers because it is limited in the soil
  3. 5. the rate at which primary producers create new organic material (2 words)
  4. 8. nitrogen is limited in what aquatic system?
  5. 9. if enough sunlight and water are available, primary productivity is limited by what?
  6. 11. phosphors is limited in what aquatic system?
  7. 12. this type of activity in the phosphorus cycle is when weathering occurs
Down
  1. 2. feedback loop that decreases the process after every cycle or product
  2. 3. this type of activity in the phosphorus cycle starts when producers take up phosphorus from the fertilizers and ends when it gets excreted as waste or from decomposition
  3. 6. needed for the growth, maintenance, and repair of tissues and cells, and for the production of the genetic building blocks, DNA and RNA
  4. 7. loop two words used to describe when the products of a system/process either stop or increase that system/process
  5. 10. feedback loop that increases the process after every cycle or product