Biogeochemical Cycles Flashcard

Front

Which cycle is responsible for the movement of carbon between the atmosphere, oceans, and living organisms?

Back

carbon cycle

Front

What is the primary source of carbon dioxide in the atmosphere?

Back

Burning of fossil fuels

Front

Which process converts atmospheric nitrogen into a form that can be used by plants?

Back

nitrogen fixation

Front

What is the main reservoir of nitrogen in the biosphere?

Back

atmosphere

Front

What is the primary source of phosphorus in the biosphere? Options: atmospheric gases, ocean water, organic matter, rocks and minerals

Back

rocks and minerals

Front

Which cycle involves the exchange of oxygen between the atmosphere, plants, and animals? Options: water cycle, nitrogen cycle, carbon cycle, oxygen cycle

Back

oxygen cycle

Front

What is the main reservoir of oxygen in the biosphere?

Back

atmosphere

Front

What is the primary source of oxygen in the atmosphere?

Back

photosynthesis

Front

Which form of nitrogen is MOST usable to MOST plants? Options: nitrate, nitrogen gas, ammonium, ammonia, atomic nitrogen

Back

nitrate

Front

Organisms require nitrogen to make which of the following?

Back

proteins and nucleic acids