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Biogeochemical Cycles Questions - All Grades

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Grade 8 Biogeochemical Cycles
Which cycle most likely includes sunlight, photosynthesis, and respiration?
  1. water cycle
  2. carbon cycle
  3. oxygen cycle
  4. nitrogen cycle
Grade 7 Biogeochemical Cycles
Which process is NOT a way that carbon in dead organisms is returned to the carbon cycle?
  1. becoming fossil fuel
  2. combustion
  3. decomposition
  4. photosynthesis
Grade 7 Biogeochemical Cycles
Through which process do living organisms release carbon into the atmosphere?
  1. photosynthesis
  2. cellular respiration
  3. transpiration
  4. combustion
Grade 9 Biogeochemical Cycles
The recycling of chemical elements throughout an ecosystem is
  1. energy.
  2. a trophic level.
  3. the phosphorus cycle.
  4. the biogeochemical cycle.
Grade 7 Biogeochemical Cycles
Which two cycles depend on photosynthesis for part of the recycling process?
  1. carbon and oxygen
  2. water and nitrogen
  3. water and oxygen
  4. carbon and nitrogen
Grade 7 Biogeochemical Cycles
Which is NOT a way that carbon cycles through the biosphere?
  1. photosynthesis
  2. transpiration
  3. combustion of fossil fuels
  4. decomposition
Grade 6 Biogeochemical Cycles
Grade 9 Biogeochemical Cycles
Grade 7 Biogeochemical Cycles
Lightning, legumes, and bacteria are a part of the
  1. water cycle.
  2. nitrogen cycle.
  3. carbon cycle.
  4. phosphorus cycle.
Grade 7 Biogeochemical Cycles
How does carbon dioxide in the atmosphere enter into living organisms?
  1. burning of forests
  2. combustion of fossil fuels
  3. photosynthesis
  4. transpiration
Grade 7 Biogeochemical Cycles
What is the role of decomposers in the nitrogen cycle?
  1. They release nitrogen gas into the atmosphere.
  2. They release nitrogen during cellular respiration.
  3. They use ammonia when they break down dead organisms.
  4. They release nitrogen into the soil when they break down dead organisms.
Grade 10 Biogeochemical Cycles
Nutrients move through an ecosystem in
  1. energy pyramids.
  2. ecological pyramids.
  3. biogeochemical cycles.
  4. the water cycle.
Grade 10 Biogeochemical Cycles
How do living things contribute to the water cycle?
  1. evaporation
  2. condensation
  3. precipitation
  4. transpiration
Grade 9 Biogeochemical Cycles
Grade 9 Biogeochemical Cycles
Grade 11 Biogeochemical Cycles
What is the best definition of global warming?
  1. Earth warming on all sides
  2. an increase in the average temperature worldwide caused by the greenhouse effect
  3. people around the world feeling warm all over
  4. Earth warming because of the many fires in the jungle
Grade 9 Biogeochemical Cycles
Grade 11 Biogeochemical Cycles
What is the role of nitrogen-fixing bacteria in the nitrogen cycle?
  1. They create acid rain.
  2. They cause algal blooms.
  3. They make nitrogen into a more useful form.
  4. They move water through the environment.
Grade 11 Biogeochemical Cycles

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