Biogeochemical Cycles

Front

What are biogeochemical cycles?

Back

Biogeochemical cycles are natural processes that recycle nutrients in various chemical forms from the environment to organisms and then back to the environment.

Front

Name the four main biogeochemical cycles.

Back

The four main biogeochemical cycles are the water cycle, carbon cycle, nitrogen cycle, and phosphorus cycle.

Front

Which nutrient is not cycled through the atmosphere?

Back

Phosphorus is not cycled through the atmosphere.

Front

What is transpiration in plants?

Back

Transpiration is the process by which plants lose water vapor through their leaves into the atmosphere.

Front

How do plants obtain water?

Back

Plants obtain water primarily from groundwater stored below the soil.

Front

What is runoff in the context of the nitrogen cycle?

Back

Runoff is the process by which water, often containing dissolved nutrients like nitrogen, flows over land and can enter local streams and bodies of water.

Front

Why is nitrogen essential for living organisms?

Back

Nitrogen is essential for living organisms because it is a key component of proteins and amino acids.

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 leaching in the context of soil and water?

Back

Leaching is the process by which soluble substances are washed out from the soil into groundwater or surface water.

Front

Describe the carbon cycle briefly.

Back

The carbon cycle involves the movement of carbon among the atmosphere, oceans, soil, and living organisms, primarily through processes like photosynthesis, respiration, and decomposition.