Question

The Carbon Cycle: can you....
1 State the two main processes involved in the carbon cycle.
2 Describe how carbon in an ecosystem is balanced.
3 Explain ways in which humans can make the carbon cycle unbalanced.

Answer 1

1 In the natural carbon cycle, there are two main processes which occur: photosynthesis and metabolism. During photosynthesis, plants use carbon dioxide and produce oxygen. During metabolism oxygen is used and carbon dioxide is a product.

2 Carbon Balance. Carbon balance is the difference between CO2 uptake by ecosystems (photosynthesis) and CO2 loss to the atmosphere by respiration.

3 Human activities, especially conventional farming activities and burning fossil carbon as fuel, have disturbed the carbon cycle's balance, leading to more carbon dioxide being released into the atmosphere than is being taken up by plants.

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Answer 2

Correct Answer:

• In the natural carbon cycle, there are two main processes that occur, which are photosynthesis and metabolism.

1. Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.
2. Metabolism is the process by which your body converts what you eat and drink into energy. During this complex process, calories in food and beverages are combined with oxygen to release the energy your body needs to function.

• Ecosystems play a prominent role in the global carbon cycle. Through the process of photosynthesis, carbon dioxide is removed from the atmosphere and used to fuel and build living organisms. This carbon can be sequestered in the tissues of living organisms, or be deposited in soils and aquatic sediments.
• There are many ways in which human beings can make the carbon cycle unbalanced. Such as, burning fossil fuels, changing land use, and using limestone to make concrete, all transfer significant quantities of carbon into the atmosphere. As a result, the amount of carbon dioxide in the atmosphere is rapidly rising; it is already greater than at any time in the last 3.6 million years.

Explanation:

Carbon cycle is nature's way of reusing carbon atoms, which travel from the atmosphere into organisms in the Earth and then back into the atmosphere over and over again. Most carbon is stored in rocks and sediments, while the rest is stored in the ocean, atmosphere, and living organisms.

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