Carbon Cycle Review

Multiple Choice

The diagram shows the carbon cycle.  If many trees are removed from a forest by logging, what is the most immediate effect on the carbon cycle in that forest?

•  increase in the rates of decomposition
• increase in the rates of atmospheric carbon dioxide
• decreased combustion of fossil fuel
•  increase production of organic compounds

Multiple Choice

Look at the picture of the glucose molecule. What property of carbon does this structure illustrate?

• Carbon can form bonds with several other elements.

• A carbon atom can bond with up to FIVE other atoms.

• Carbon atoms can bond ONLY with oxygen.

• Carbon can form bonds ONLY with hydrogen.

• Carbon atoms can form rings of hexagons ONLY.

Multiple Choice

Which of the following explains the role of plants in the carbon cycle?

• Plants transfer carbon dioxide in the atmosphere to carbohydrates in the biosphere.

• Plants transport carbon dioxide in the atmosphere to groundwater.

• Plants transfer oxygen and carbohydrates in the biosphere to carbon dioxide in the atmosphere.

Multiple Choice

What happens to the carbon in plants when they are eaten by animals?

• It is immediately released into the atmosphere as carbon dioxide

• It is transformed into energy and some of it becomes part of the animal's body

• It is stored indefinitely within the animal's body

• It is converted into oxygen through the process of digestion

Multiple Choice

What happens to carbon in plants when they die and decompose?

• It is released as oxygen.

• It is stored in the soil indefinitely.

• It is released as carbon dioxide by decomposers.

• It is converted into nitrogen.

Multiple Choice

What is happening in step
1?

• Animals are decomposing and realizing carbon into the soil.
• Animals are releasing energy into the environment and storing carbon.
• Animals are turning carbon dioxide from the atmosphere into organic molecules.
• Animals are breaking down organic molecules and releasing carbon dioxide into the atmosphere.

Multiple Choice

What happens to the carbon from dead stuff?

• It is broken down by decomposers

• It becomes fossil fuels

• It is released into the atmosphere

• It is absorbed by living plants

Multiple Choice

The diagram shows the carbon cycle. If many trees are removed from a forest by logging, what is the most immediate effect on the carbon cycle in that forest?

• increase in the rates of decomposition

• increase in the rates of atmospheric carbon dioxide

• decreased combusion of fossil fuel

• increase production of organic compounds

Multiple Choice

What is the significance of the carbon cycle in relation to the movement of carbon atoms?

• It helps in the formation of new organisms.

• It allows carbon atoms to be recycled for millennia.

• It prevents carbon from entering the atmosphere.

• It is a process that only occurs in plants.

Multiple Choice

What is the effect of burning fossil fuels on the atmosphere?

• It increases oxygen levels

• It puts carbon dioxide back into the atmosphere

• It decreases global temperatures

• It has no effect on the atmosphere

Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident