What is the primary element involved in the phosphorus cycle?

• Oxygen

• Carbon

• Nitrogen

• Phosphorus

Where does the phosphorus cycle start?

• In the hydrosphere

• In the biosphere

• In the earth's crust

• In the atmosphere

What is the role of phosphorus in living organisms?

• It forms a significant part of the structural framework of DNA and RNA.

• It is used as a primary energy source for cellular processes.

• It helps in the transportation of oxygen in the bloodstream.

• It is primarily used in the formation of cell membranes.

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NGSS.MS-LS2-3

How do plants primarily obtain phosphorus?

• By consuming other plants

• Absorbing phosphate salts dissolved in water

• From the atmosphere

• Through photosynthesis

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NGSS.MS-LS2-1

What is a significant human impact on the phosphorus cycle?

• Solar radiation management

• Use of phosphorus fertilizers

• Deforestation

• Urbanization

Why do farmers apply phosphate fertilizers on agricultural land?

• To reduce the soil's acidity

• To enhance the soil's aeration

• To increase the level of phosphorus in the soil

• To increase the soil's water retention

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

What happens to phosphorus when plants and animals die?

• It is absorbed by living plants and animals nearby.

• It is converted into the inorganic form and recycled to soil and water.

• It becomes permanently trapped within their remains.

• It is immediately released into the atmosphere.

Tags

NGSS.MS-LS2-3