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Biogeochemical Cycles Questions - All Grades

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Grade 11 Biogeochemical Cycles
The carbon reservoir most affected as a direct result of human activity is the                .
  1. deep ocean
  2. vegetation
  3. atmosphere
  4. photosynthesis
Grade 9 Biogeochemical Cycles
Bacteria turn atmospheric nitrogen into a form of nitrogen usable by plants through the process of                  .
  1. bacteria fixation
  2. nitrogen fixation
  3. denitrogenation
  4. nitrogenation
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
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
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
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
Through which process do living organisms release carbon into the atmosphere?
  1. photosynthesis
  2. cellular respiration
  3. transpiration
  4. combustion
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 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 11 Biogeochemical Cycles
A cycle that continuously moves atoms, ions, and molecules from nonliving factors to living organisms is a                         .
  1. photogeochemical cycle
  2. chemogeobiological cycle
  3. biogeochemical cycle
  4. geobiochemical cycle
Grade 5 Biogeochemical Cycles
The continuous movement of nitrogen between air, soil, plants, and animals is the
  1. carbon cycle.
  2. atmosphere.
  3. nitrogen cycle.
  4. pollutant.
Grade 9 Biogeochemical Cycles
Which nutrient cycle needs a nutrient to be fixed prior to use by producers and consumers?
  1. carbon
  2. nitrogen
  3. phosphorus
  4. water
Grade 6 Biogeochemical Cycles
Combustion occurs in the                 cycle.
  1. water
  2. oxygen
  3. carbon
  4. nitrogen
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

This question is a part of a group with common instructions. View group »

What is the process by which carbon is released into the atmosphere from cars, homes, and factories?
  1. respiration
  2. transpiration
  3. photosynthesis
  4. combustion
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 5 Biogeochemical Cycles
What is the greenhouse effect?
  1. Gases are trapped in Earth's atmosphere and cool the planet.
  2. Gases are trapped in Earth's atmosphere and warm the planet.
  3. The Sun is heating up Earth's surface.
  4. The moon is cooling Earth's surface.
Grade 5 Biogeochemical Cycles
The continuous transfer of carbon between the atmosphere and organisms is the
  1. nitrogen cycle.
  2. carbon cycle.
  3. hemisphere.
  4. water cycle.
Grade 10 Biogeochemical Cycles
Nutrients move through an ecosystem in
  1. energy pyramids.
  2. ecological pyramids.
  3. biogeochemical cycles.
  4. the water cycle.
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