Front

What are geochemical cycles?

Back

Geochemical cycles are natural processes that recycle nutrients in various chemical forms from the non-living environment to living organisms and back.

Front

What is the carbon cycle?

Back

The carbon cycle is the process by which carbon is exchanged between the atmosphere, land, water, and living organisms.

Front

How do fossil fuels form?

Back

Fossil fuels form from the remains of ancient plants and animals that have been subjected to heat and pressure over millions of years.

Front

What role do plants play in the carbon cycle?

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Plants absorb carbon dioxide from the atmosphere during photosynthesis, converting it into organic matter.

Front

What is nitrogen fixation?

Back

Nitrogen fixation is the process by which atmospheric nitrogen is converted into a form usable by living organisms, often by bacteria.

Front

What is the significance of decomposers in geochemical cycles?

Back

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

Front

What can excess nitrogen in ecosystems lead to?

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Excess nitrogen can disrupt the equilibrium of ecosystems, leading to a decline in species diversity.

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How do living organisms return carbon to the atmosphere?

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Living organisms return carbon to the atmosphere through respiration and decomposition.

Front

What is the water cycle?

Back

The water cycle is the continuous movement of water on, above, and below the surface of the Earth, involving processes like evaporation, condensation, and precipitation.

Front

What is runoff in the water cycle?

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Runoff is the flow of water, from rain or melting snow, that moves across the ground and returns to bodies of water.