Nutrient Cycles & Succession Review

In the carbon cycle, producers take in carbon dioxide during the process of

• Cellular Respiration

• Combustion

• Photosynthesis

• Decomposition

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Carbon is passed through the food web from producers to

• Autotrophs

• Consumers

• Abiotic factors

• Sunlight

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All living things return carbon dioxide to the atmosphere through the process of

• Photosynthesis

• Combustion

• Global warming

• Cellular respiration

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Oceans and forests are known as _____ because they can store a lot of carbon.

• Carbon sinks

• Greenhouse gases

• Fossil fuels

• Carbonates

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When an organism dies, the carbon stored in its molecules may eventually form

• Carbon sinks

• Fossil fuels

• Carbohydrates

• Decomposers

A lot of carbon dioxide is returned to the atmosphere through

• Carbon sinks

• Combustion

• Photosynthesis

• Global warming

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The short-term carbon cycle includes

• Storage of carbon in fossil fuels

• Storage of carbon in limestone and shells

• Storage of carbon in ocean water

• Cycling of carbon between the atmosphere and living things

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The long-term carbon cycle includes

• Storage of carbon in fossil fuels

• Storage of carbon in limestone and shells

• Storage of carbon in ocean water

• All of these

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Living things need nitrogen to make

• Proteins

• Fossil fuels

• Carbohdrates

• Food

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Nitrogen gas makes up ____ % of our atmosphere.

• 100%

• 1%

• 25%

• 78%