Cycling of Matter

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 such as photosynthesis, respiration, decomposition, and combustion.

Front

How do humans contribute to the carbon cycle?

Back

Humans contribute to the carbon cycle primarily by burning fossil fuels, which releases carbon dioxide into the atmosphere, and through deforestation, which reduces the number of trees that can absorb CO2.

Front

What role do plants play in the carbon cycle?

Back

Plants absorb carbon dioxide from the atmosphere during photosynthesis and use it to produce carbohydrates, which are essential for their growth and energy.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy, usually from the sun, into chemical energy in the form of glucose, using carbon dioxide and water.

Front

What is cellular respiration?

Back

Cellular respiration is the process by which living organisms convert glucose and oxygen into energy, carbon dioxide, and water. It is the reverse of photosynthesis.

Front

What are fossil fuels?

Back

Fossil fuels are natural substances formed from the remains of ancient plants and animals, primarily composed of carbon. They include coal, oil, and natural gas.

Front

What is deforestation?

Back

Deforestation is the clearing or thinning of forests by humans, which can lead to increased carbon dioxide levels in the atmosphere due to the loss of trees that absorb CO2.

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, fats, and carbohydrates, which are essential for all living organisms.

Front

What is the greenhouse effect?

Back

The greenhouse effect is the warming of the Earth's surface due to the trapping of heat by greenhouse gases, such as carbon dioxide, in the atmosphere.

Front

What is the role of decomposers in the carbon cycle?

Back

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