Biogeochemical Cycles (Nitrogen/Carbon Cycle) Review- Hoover

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy, using carbon dioxide and water to produce glucose and oxygen.

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What are the two main products of photosynthesis?

Back

Oxygen and glucose.

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What is the nitrogen cycle?

Back

The nitrogen cycle is the series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms, including nitrogen fixation, nitrification, and denitrification.

Front

What is nitrogen fixation?

Back

Nitrogen fixation is the process of converting nitrogen gas (N2) from the atmosphere into ammonia (NH3) or related compounds in soil, primarily by bacteria.

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How do plants absorb nitrogen?

Back

Plants absorb nitrogen in the form of nitrates (NO3-) or ammonium (NH4+) from the soil.

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What role do bacteria play in the nitrogen cycle?

Back

Bacteria play a crucial role in the nitrogen cycle by fixing nitrogen, converting it into forms usable by plants, and decomposing organic matter to release nitrogen back into the soil.

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What is runoff in the context of the nitrogen cycle?

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Runoff is the process by which water, often containing dissolved nutrients like nitrogen from fertilizers, flows over land and enters streams, rivers, and lakes.

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What is the role of lightning in the nitrogen cycle?

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Lightning can convert nitrogen gas in the atmosphere into nitrates, which then fall to the ground with rain and become available for plant use.

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What is respiration in the context of the carbon cycle?

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Respiration is the process by which living organisms convert glucose and oxygen into energy, releasing carbon dioxide as a byproduct.

Front

What is the carbon cycle?

Back

The carbon cycle is the series of processes by which carbon compounds are interconverted in the environment, including photosynthesis, respiration, decomposition, and combustion.