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WorksheetsBiogeochemical Cycles
Total questions: 10
Worksheet time: 5mins
What is the main process involved in the fast/short/quick carbon cycle?
erosion and weathering
evaporation and condensation
combustion and decomposition
photosynthesis and respiration
Which organisms are responsible for nitrogen fixation in the nitrogen cycle?
Plants and animals
Viruses and protists
Fungi and algae
Bacteria
What is the primary source of phosphorus in the phosphorus cycle?
Atmosphere
Rocks and minerals
Water bodies
Plants and animals
What is the role of photosynthesis in the carbon cycle?
Photosynthesis converts carbon dioxide into oxygen and glucose, playing a key role in the carbon cycle.
Photosynthesis converts glucose into carbon dioxide and oxygen, playing a key role in the carbon cycle.
Photosynthesis converts oxygen into carbon dioxide and glucose, playing a key role in the carbon cycle.
Photosynthesis has no role in the carbon cycle.
What are the main reservoirs of carbon in the carbon cycle?
lakes, rivers, animals
deserts, forests, grasslands
oceans sediments, fossil fuels
rocks and atmosphere
What is denitrification in the nitrogen cycle?
Denitrification is the conversion of nitrogen gas into nitrates by denitrifying bacteria.
Denitrification is the conversion of nitrogen gas into ammonia by denitrifying bacteria.
Denitrification is the conversion of nitrates into oxygen by denitrifying bacteria.
Denitrification is the conversion of nitrates into nitrogen gas by denitrifying bacteria.
How does phosphorus enter the food chain in the phosphorus cycle?
Phosphorus enters the food chain through evaporation and subsequent condensation in the atmosphere.
Phosphorus enters the food chain through absorption by plants from the soil.
Phosphorus enters the food chain through direct absorption by animals from water sources.
Phosphorus enters the food chain through consumption of phosphorus-rich rocks by animals.
What is the role of nitrogen-fixing bacteria in the nitrogen cycle?
Nitrogen-fixing bacteria convert atmospheric nitrogen into carbon dioxide in the nitrogen cycle.
Nitrogen-fixing bacteria convert atmospheric nitrogen into a usable form for plants in the nitrogen cycle.
Nitrogen-fixing bacteria break down nitrogen compounds into atmospheric nitrogen in the nitrogen cycle.
Nitrogen-fixing bacteria release nitrogen gas into the atmosphere in the nitrogen cycle.
Why is phosphorus important for plant growth in the phosphorus cycle?
Phosphorus is not important for plant growth in the phosphorus cycle.
Phosphorus is only important for animal growth in the phosphorus cycle.
Phosphorus is important for plant growth in the phosphorus cycle because it is a key component of DNA, RNA, and ATP.
Phosphorus is important for plant growth in the nitrogen cycle.
This is NOT a part of the phosphorus cycle.
Phosphate is incorporated into sedimentary rocks
Phosphate bound to soil
Atmospheric phosphate
Phosphate is absorbed from the soil by plants
