Carbon Cycle Unit Test

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					Carbon Cycle Unit Test - Agriscience
Name:                                                         Hour               Date:

Date Assignment is due: end of class                   Why late?
                       Day of Week     Date                          If your project was late, describe why




   1. Which of the following contains carbon?
         a. Plants
         b. Animals
         c. Air
         d. All of the above contain carbon

   2. Which of the following DOES NOT contain carbon
         a. Plants
         b. Animals
         c. Air
         d. All of the above contain carbon

   3. Plants consume most of their carbon from…
          a. The air
          b. The soil
          c. The water
          d. None of the above

   4. When a human or animal consumes food, the carbon in that food is most likely to be converted into which of
      the following elements?
          a. Oxygen
          b. Hydrogen
          c. Nitrogen
          d. None of the above; the carbon will remain carbon

   5. Which of the following consumes carbon dioxide (CO2)?
         a. Plants
         b. Animals
         c. Decomposers
         d. All of the above

   6. Which of the following produces carbon dioxide (CO2)?
         a. Plants
         b. Animals
         c. Decomposers
         d. All of the above
7. When a log is thrown on a fire it seems to lose weight; what happens to its physical mass?
     a. It disappears
     b. It is released into the air
     c. It becomes energy
     d. The log does not change weight or size

8. From where does a log primarily obtain its physical mass when it is growing?
      a. From the soil
      b. From the water
      c. From the air
      d. From the seed

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 is 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

14. Replacing oil and coal with plant-matter as a source of energy would           the amount of carbon in the
    atmosphere
       a. Increase b. Decrease c. Not affect
    Use the image above to answer the questions below

15. Look at “1”. What process is occurring here?
       a. Photosynthesis b. Respiration c. Decomposition         d. Burning

16. At “1”, what is occurring?
        a. H2O and CO2 is being converted into organic C6H12O6.
        b. C6H12O6 is being broken down into H2O and inorganic CO2
        c. C6H12O6 remains in its organic form
        d. C6H12O6 is being created from the energy of the sun

17. Look at “2”. What process is occurring here?
       a. Photosynthesis b. Respiration c. Decomposition         d. Burning

18. At “2”, what is occurring?
        a. H2O and CO2 is being converted into organic C6H12O6.
        b. C6H12O6 is being broken down into H2O and inorganic CO2
        c. C6H12O6 remains in its organic form
        d. C6H12O6 is being created from the energy of the sun

19. What form of carbon are we most likely to find at “3”?
      a. C6H12O6
      b. CO2
      c. CH4
      d. Living Tissue

20. Look at “4”. What process is occurring here?
       a. Photosynthesis b. Respiration c. Decomposition         d. Burning
21. ESSAY: Choose one of the following to respond to.

   Option A: Assume the role of a farmer and design a soil management technique to maximize carbon
   sequestration and minimize the production of CO2. Then explain why you think this practice will work. Finally,
   describe how it will change what farmers do in addition to growing food (i.e. what other benefits can farming
   provide besides food production and why is this good?).

   Option B: According to an article by Ted Schuur at the University of Florida, researchers are investigating
   whether or not climate change could alter the natural cycling of carbon around the world. In the article, Schuur
   mentions permafrost in the artic, where twice as much carbon is stored in the soil as compared to the
   atmosphere. Why would these northern frozen soils contain such large amounts of carbon? Why would we be
   concerned if these soils began to warm up? What might happen if permafrost is no longer permanently frozen?

   Option C: Reflect back on the Bucket Gassers experiment. Rank the measured sites in order from greatest CO2
   produced to lowest. Beside each site, provide an explanation as to why each site had a high or low production of
   CO2. Then design a method that would lower the CO2 production of each site if applied. Conclude by explaining
   why you think your method will work.


   Option chosen (circle) A B C                                                    Attach an additional sheet if needed.

				
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posted:12/31/2011
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