The Carbon Cycle

Front

What is the carbon cycle?

Back

The carbon cycle is the process by which carbon is exchanged among the atmosphere, land, water, and living organisms. It involves processes like photosynthesis, respiration, decomposition, and combustion.

Front

What role do shells play in the carbon cycle?

Back

Shells, created by organisms like coral and oysters, are made from carbon. When these organisms die, their shells contribute to the carbon stored in limestone.

Front

What is limestone and how is it formed?

Back

Limestone is a type of sedimentary rock formed from the accumulation of shells and other calcium carbonate materials from dead sea organisms.

Front

Is the total amount of carbon on Earth constant?

Back

Yes, the total amount of carbon on Earth is constant, although it can change forms and locations through various processes.

Front

How do living organisms return carbon to the atmosphere?

Back

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

Front

What do bacteria release during decomposition?

Back

Bacteria that decompose dead plants and animals release carbon back into the atmosphere.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of carbon dioxide and water, releasing oxygen as a byproduct.

Front

What is respiration in the context of the carbon cycle?

Back

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

Front

What is the significance of carbon in living organisms?

Back

Carbon is a fundamental building block of life, forming the backbone of organic molecules such as proteins, lipids, carbohydrates, and nucleic acids.

Front

What is the role of oceans in the carbon cycle?

Back

Oceans act as a major carbon sink, absorbing carbon dioxide from the atmosphere and storing it in water and marine organisms.