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Biogeochemical Cycles Questions - All Grades

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Grade 7 Biogeochemical Cycles
Which process converts nitrogen into ammonia?
  1. denitrification
  2. nitrogen fixation
  3. nitrogen conversion
  4. ammonia synthesis
Grade 10 Biogeochemical Cycles
This phenomenon occurs when gases function like glass in a greenhouse, allowing visible light to enter but trapping the heat.
  1. solar flares
  2. abiotic factor
  3. ozone effect
  4. greenhouse effect
Grade 10 Biogeochemical Cycles
Too much phosphorus in waterways (rivers, lakes) can lead to                .
  1. death
  2. diseases
  3. eutrophication
  4. nothing
Grade 10 Biogeochemical Cycles
How can bacteria change nitrogen into forms that plants can use?
  1. nitrogen fixation
  2. denitrification
  3. evaporation
  4. condensation
Grade 10 Biogeochemical Cycles
What is the term for how water becomes water vapor?
  1. evaporation
  2. condensation
  3. precipitation
  4. sublimation
Grade 6 Biogeochemical Cycles
Which resource is necessary for aquatic (water) life to survive?
  1. dissolved oxygen
  2. nitrates
  3. alkalinity
  4. point-source pollution
Grade 10 Biogeochemical Cycles
What is different about the phosphorus cycle as compared to the water, carbon, and nitrogen cycles?
  1. It is not a cycle.
  2. The atmosphere is not involved in the phosphorus cycle.
  3. It is not needed by organisms.
  4. It is not as important.
Grade 10 Biogeochemical Cycles
Which process(es) is/are part of the carbon cycle in an ecosystem? Select all that apply.
  1. photosynthesis
  2. microbial decomposition
  3. formation of fossil fuels
  4. combustion to power cars and heat homes
Grade 10 Biogeochemical Cycles
Which cycle involves transpiration? Select all that apply.
  1. hydrologic
  2. phosphorus
  3. nitrogen
  4. carbon
Grade 11 Biogeochemical Cycles
Which means directly uses fossil fuels?
  1. a nuclear reactor
  2. an oil-fired furnace
  3. a wind generator
  4. a woodburning stove
Grade 9 Biogeochemical Cycles
Phosphorus enters the food web through water runoff.
  1. True
  2. False
Grade 5 Biogeochemical Cycles
What activity produces carbon dioxide?
  1. sleeping
  2. planting a tree
  3. driving a car
  4. chasing friends
Grade 12 Biogeochemical Cycles
We know that temperature controls the rate of respiration and changes the amount of organic matter stored in soil. Based on your knowledge of respiration, would you expect to find more carbon stored in soil in a cool or warm climate? Why?
  1. cool, because there is less sunlight available, which reduces the rate of photosynthesis
  2. cool, because microbes in the soil are less active as evidenced through lower rates of respiration
  3. warm, because microbes in the soil have higher rates of respiration, which releases more carbon into the soil
  4. warm, because sunlight is readily available, which means plants increase their rate of photosynthesis, leading to more carbon produced
Grade 9 Biogeochemical Cycles
In the water cycle, what is the correct order of processes?
  1. Runoff and Seepage, evaporation, condensation, precipitation, transpiration
  2. Condensation, evaporation, precipitation, runoff and seepage, transpiration
  3. Evaporation, precipitation, condensation, transpiration, runnoff and seepage
  4. Evaporation, condensation, precipitation, transpiration, runoff and seepage
  5. A and B
  6. A and E
  7. None
Grade 12 Biogeochemical Cycles
What is carbon assimilation?
  1. rate at which plants convert carbon dioxide to oxygen
  2. frequency with which plants perform photosynthesis
  3. amount of carbon dioxide that plants convert to glucose
  4. rate at which plants convert carbon dioxide to glucose
Grade 7 Biogeochemical Cycles
Before plants can use ammonia for nitrogen, it must be changed into which form(s)?
  1. nitrogen gas and nitrates
  2. nitrogen gas and nitrites
  3. nitrates and nitrites
  4. amino acids and nitrogen gas
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