ENVS320 Midterm Review

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Author:
saitclt
ID:
188997
Filename:
ENVS320 Midterm Review
Updated:
2012-12-12 16:05:47
Tags:
ENVS320 SAIT CLT2
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Description:
Terms and key concepts for the first unit, (note: this stuff is from before the midterm, so it isn't on the final exam)
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  1. When Nitrates become Nitrogen gas (N2) (typically under anaerobic conditions) this is called
    Denitrification
  2. When ammonia is converted to nitrates by nitrosifying bacteria, (in other words, when ammonia is oxidized), this is called
    Nitrification
  3. When nitrogen gas is converted to ammonia or ammonium compounds, this is called
    Nitrogen Fixation
  4. When plants take up nitrogen compounds this is called
    Assimilation
  5. The limiting nutrient in plants (terrestrial ecosystems) is
    nitrogen
  6. A typical limiting nutrient in aquatic ecostystems is
    phosphorous
  7. Name a biodegradable pollutant that contributes to eutrophication
    phosphorus
  8. PBB
    Poly brominated biphenyl
  9. For PBBs, toxicity _____ with each additional Br substituted into the ring
    decreases
  10. Name three compounds that exhibit biomagnification
    • Organo-chloride pesticides (DDT)
    • Heavy metals
    • Dioxins
  11. Name 3 ways in which toxic compounds can be transported
    • Wind (Aerial spraying of pesticides)
    • Precipitation
    • Leaching

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