Biogeochemical Cycles

Front

What is a biogeochemical cycle?

Back

A biogeochemical cycle is the movement of elements and compounds through living organisms and the physical environment, involving biological, geological, and chemical processes.

Front

Why do living things need nitrogen?

Back

To make proteins and amino acids.

Front

What is the only process that removes carbon from the atmosphere?

Back

Photosynthesis.

Front

What nutrient is not cycled through the atmosphere?

Back

Phosphorous.

Front

How does carbon dioxide enter the atmosphere?

Back

Through burning fossil fuels, cellular respiration, and decomposing organic matter.

Front

What is nitrogen fixation?

Back

Nitrogen fixation is the process of converting atmospheric nitrogen (N2) into a form usable by living organisms, typically ammonia (NH3).

Front

What is runoff in the context of biogeochemical cycles?

Back

Runoff is the movement of water, along with dissolved nutrients and pollutants, from land to bodies of water, often carrying fertilizers into streams and rivers.

Front

What role do decomposers play in biogeochemical cycles?

Back

Decomposers break down dead organic matter, returning nutrients to the soil and making them available for uptake by plants.

Front

What is the significance of photosynthesis in the carbon cycle?

Back

Photosynthesis is crucial as it removes carbon dioxide from the atmosphere and converts it into organic matter, which is the foundation of the food web.

Front

What is ammonification?

Back

Ammonification is the process by which organic nitrogen is converted into ammonia by decomposers.