U2L6 Carbon Cycle

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. It involves various processes such as photosynthesis, respiration, decomposition, and combustion.

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 is combustion?

Back

Combustion is a chemical process in which a substance reacts with oxygen to produce heat and light, commonly referred to as burning.

Front

What are the key processes in the carbon cycle?

Back

The key processes in the carbon cycle include photosynthesis, respiration, and combustion.

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 chlorophyll, converting carbon dioxide and water into glucose and oxygen.

Front

What role does respiration play in the carbon cycle?

Back

Respiration is the process by which living organisms convert glucose and oxygen into energy, releasing carbon dioxide back into the atmosphere.

Front

What is decomposition?

Back

Decomposition is the process by which organic substances are broken down into simpler organic or inorganic matter, returning carbon to the soil and atmosphere.

Front

How do human activities contribute to the carbon cycle?

Back

Human activities, such as burning fossil fuels and deforestation, significantly impact the carbon cycle by increasing carbon dioxide levels in the atmosphere.

Front

What is the impact of burning fossil fuels on the environment?

Back

Burning fossil fuels releases carbon dioxide and other greenhouse gases into the atmosphere, contributing to climate change and acid rain.

Front

What is acid rain?

Back

Acid rain is precipitation that contains high levels of sulfuric and nitric acids, often resulting from the burning of fossil fuels and industrial emissions.