Biogeochemical Cycles Quiz

In the carbon cycle, which process removes carbon dioxide from the atmosphere?

• Cellular respiration

• Combustion

• Photosynthesis

• Decomposition

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NGSS.MS-LS1-6

Which process releases carbon dioxide into the atmosphere as a waste product?

• Photosynthesis

• Cellular respiration

• Nitrogen fixation

• Weathering

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NGSS.HS-LS1-7

NGSS.HS-LS2-5

Why can plants NOT use nitrogen directly from the atmosphere?

• Nitrogen gas is toxic to plants

• Nitrogen gas is too heavy to enter leaves

• Nitrogen gas must first be changed into a usable form

• Plants do not need nitrogen

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NGSS.MS-LS2-3

Which living organisms are most important for changing nitrogen into different usable forms?

• Plants

• Animals

• Fungi

• Bacteria

Which nitrogen process changes nitrogen gas into a usable form by bacteria or lightning?

• Denitrification

• Nitrification

• Nitrogen fixation

• Decomposition

Excess nitrogen (fertilizers) entering water systems can cause:

• Acid rain

• Climate change

• Eutrophication

• Fossilization

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Which statement correctly compares the cycles?

• Water, carbon, and nitrogen cycles move through the atmosphere

• Only carbon and nitrogen move through the atmosphere

• Only water moves through the atmosphere

• All three cycles depend equally on bacteria

The process where organisms like bacteria and fungi break down dead organisms and return nutrients to the soil is called (a)   .

• photosynthesis

• decomposition
• plants

• carbon dioxide (CO2)

• atmosphere

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

Nitrogen must be changed by bacteria into usable forms before it can be taken in by ​ (a)   .

• photosynthesis
• decomposition
• carbon dioxide (CO2)
• atmosphere
• plants

Burning fossil fuels releases excess ​ (a)   into the atmosphere in the carbon cycle.

• photosynthesis

• decomposition

• plants

• carbon dioxide (CO2)
• atmosphere