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4.3: Carbon Cycling

4.3 (6 reviews)
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Define "autotroph."

Understanding: Autotrophs convert carbon dioxide into carbohydrates and other carbon compounds.
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All living things respire, the metabolic process of converting biochemical energy from nutrients into adenosine triphosphate (ATP) for cellular work. CO₂ is a waste product of respiration.

Respiration converts organic carbon molecules into inorganic carbon molecules which then diffuse into water or the atmosphere.
Image: *State the role of respiration in the carbon cycle.*

Understanding:  Carbon dioxide is produced by respiration and diffuses out of organisms into water or the atmosphere.