Biogeochemical Cycles Quiz

What is the primary difference between the flow of energy and the cycling of matter in an ecosystem?

• Both energy and matter flow in one direction.

• Energy flows in one direction, while matter cycles and recycles.

• Energy flows in multiple directions, while matter cycles in one direction.

• Both energy and matter cycle and recycle.

Which process in the water cycle involves plants releasing water vapor through their leaves?

• Condensation

• Evaporation

• Transpiration

• Precipitation

How does carbon primarily return to the atmosphere in the carbon cycle?

• Through precipitation

• Through respiration and burning of fossil fuels

• Through nitrogen fixation

• Through photosynthesis

Which process is key for removing carbon dioxide from the atmosphere?

• Denitrification

• Photosynthesis

• Respiration

• Decomposition

What role do nitrogen-fixing bacteria play in the nitrogen cycle?

• They convert nitrogen gas into a form usable by plants.

• They convert nitrates into ammonium.

• They release nitrogen gas back into the atmosphere.

• They decompose organic matter into nitrogen gas.

Which type of plants typically have a symbiotic relationship with nitrogen-fixing bacteria?

• Ferns

• Conifers

• Legumes

• Grasses

Which cycle involves the conversion of atmospheric nitrogen into a form usable by living organisms?

• Carbon cycle

• Phosphorus cycle

• Water cycle

• Nitrogen cycle

What is the main consequence of excessive phosphorus in aquatic environments?

• Algae blooms

• Decreased plant growth

• Reduced water temperature

• Increased oxygen levels

In the phosphorus cycle, what is the long-term source of phosphorus?

• Evaporation from water bodies

• Atmospheric deposition

• Weathering of rocks

• Decomposition of plants

What limits the growth of producers in an ecosystem when phosphorus is scarce?

• Lack of nitrogen

• Lack of water

• Lack of sunlight

• Lack of phosphorus