Q:

What is the definition of "carbon dioxide-oxygen cycle"?

A:

Quick Answer

According to Locust Valley Central School District, the carbon dioxide-oxygen cycle is the process through which carbon dioxide and oxygen move through the natural environment by photosynthesis, respiration, combustion and decomposition. Plants and animals are important to the carbon dioxide-oxygen cycle.

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Full Answer

During photosynthesis, plants absorb carbon dioxide through openings in their leaves. In the chlorophyll or green pigment in the leaves, the carbon dioxide, along with water and sunlight, is converted to sugar, used for energy in the plant, and oxygen and water vapor, which are released into the air. During respiration, animals breathe in the oxygen in the atmosphere and use it along with food to create energy. This process releases carbon dioxide which animals release into the air. Combustion is any source of burning, such as fires, volcanoes and using fossil fuels for energy, which also releases carbon dioxide into the air. Decomposition is when dead plants and animals breakdown. This returns the carbon dioxide and oxygen from the plant or the animal's body back to the environment.

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Related Questions

  • Q:

    What are some answers to common life science questions?

    A:

    A request for details on the process of photosynthesis, for example, reveals that plant cells use sunlight and carbon dioxide to produce glucose and oxygen. Defining the term "evolution" is another common inquiry. A relevant answer describes evolution as the process of an organism adapting to its environment over time.

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  • Q:

    How does photosynthesis affect the environment?

    A:

    Photosynthesis plays an important role in the environment for several reasons as it helps clean the air because plants use the carbon dioxide in the air for photosynthesis, the plants produce oxygen as a by-product which all humans and animals need to live and it also makes plants grow, providing food for animals that feed on plants. Without plants, the world would quickly become uninhabitable for human and animal life. The oxygen would be used up and there would be no food to feed the animals that humans rely on for food.

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  • Q:

    Why do people breathe out carbon dioxide?

    A:

    People and animals breathe in oxygen and breathe out carbon dioxide because of a process called cellular respiration. During cellular respiration, oxygen is combined with food nutrients and water in order to produce usable energy in the form of adenosine tri-phosphate (ATP). The byproduct of this process is carbon dioxide, which is removed from the body through breathing.

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  • Q:

    Why is sunlight important?

    A:

    In addition to the role it plays in driving the water cycle and affecting climate and weather, the energy received from the sun also makes possible the process of photosynthesis, which maintains the atmospheric levels of oxygen required for aerobic organisms to exist on Earth. The light energy captured by plants through photosynthesis is also the source of the energy stored in the organic compounds that provide the greater portion of the energy required for multicellular life to continue. The solar energy stored in fossil fuels and released through burning for human use represents another important role played by sunlight.

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