9. The Carbon Cycle is best defined as the process in which... a. Carbon changes from inorganic forms to organic forms and back
b. Carbon is changed into other elements, including oxygen and hydrogen
c. Carbon consumed and regenerated from other elements such as oxygen, hydrogen, and nitrogen
d. Carbon is continually created from the sun's energy by living organisms
10. Organisms such as fungi and microbes that are decomposers will affect the carbon cycle by...
a. Consuming carbon, reducing the total amount of carbon that exists in the cycle
b. Releasing CO2 into the atmosphere, increasing atmospheric levels of carbon
C. Creating carbon from other atomic elements (such as oxygen)
d. None of the above; decomposers do not affect the carbon cycle
11. Photosynthesizing plants affect the carbon cycle by...
a. Creating more carbon atoms
b. Reducing the amount of carbon in the soil, reducing soil fertility
C. Absorbing CO2 from the atmosphere, lowering atmospheric levels of carbon
d. None of the above; plants to do not affect the carbon cycle
12. Animals affect the carbon cycle by...
a. Creating more carbon atoms through cell division
b. Releasing CO2 into the atmosphere, increasing atmospheric levels of carbon
C. Consuming carbon, reducing the total amount of carbon that exists in the cycle
d. None of the above; animals do not affect the carbon cycle
13. The burning of coal and oil for energy affects the carbon cycle in what way?
a. It increases the amount of carbon in existence
b. It decreases the amount of carbon in existence
c. It increases the amount of atmospheric carbon
d. It does not affect the carbon cycle
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