Question

carbon cycle article questions
matching
term definition

1. decomposition a. any reservoir that absorbs more carbon dioxide from the atmosphere than it releases
2. photosynthesis b. the deposition of organic and inorganic particles on the ocean floor
3. ocean uptake c. the process by which organisms obtain and release energy from carbon compounds and release carbon dioxide into the atmosphere
4. sedimentation d. process where carbon from decaying organic matter is returned to the soil
5. cell respiration e. in this process, dissolved carbon dioxide enters the oceans
6. combustion f. process that uses sunlight, water, and carbon dioxide to produce glucose and oxygen
7. carbon sink g. when fossil fuels or other materials are burned for energy

multiple choice

1. which process in the carbon cycle converts carbon dioxide into organic matter?

a. cellular respiration
b. decomposition
c. photosynthesis

1. what is the main source of carbon for plants during photosynthesis?

a. carbon dioxide in the atmosphere
b. carbon dioxide dissolved in water
c. carbon in the soil

1. what happens to carbon during cellular respiration?

a. it is converted into organic matter.
b. it is released back into the atmosphere as carbon dioxide.
c. it is absorbed by plants for respiration.

1. how do oceans contribute to the carbon cycle?

a. by releasing carbon dioxide into the atmosphere
b. by absorbing carbon dioxide from the atmosphere
c. by converting carbon dioxide into organic matter

1. how do sedimentary rocks contribute to the carbon cycle?

a. by absorbing carbon dioxide from the atmosphere
b. by storing carbon over long periods of time
c. by converting carbon into organic matter

1. what happens when fossil fuels are burned for energy?

a. carbon stored in them is released as carbon dioxide.
b. carbon is converted into sedimentary rocks.
c. carbon is absorbed by the oceans.

1. how have human activities impacted the carbon cycle?

a. by decreasing the levels of carbon dioxide in the atmosphere
b. by increasing the levels of carbon dioxide in the atmosphere through the burning of fossil fuels
c. by trapping carbon dioxide in sedimentary rocks

1. what natural process contributes to the sudden release of large amounts of carbon dioxide into the atmosphere?

a. photosynthesis
b. volcanic eruptions
c. oceanic uptake

1. what is the main process by which carbon is returned to the soil as nutrients?

a. photosynthesis
b. decomposition
c. sedimentation

Explanation:

1. Decomposition is the process where carbon from decaying organic matter is returned to the soil (D).
2. Photosynthesis uses sunlight, water, and carbon dioxide to produce glucose and oxygen (F).
3. Ocean uptake is when dissolved carbon dioxide enters the oceans (E).
4. Sedimentation is the deposition of organic and inorganic particles on the ocean floor (B).
5. Cell respiration is the process by which organisms obtain and release energy from carbon compounds and release carbon dioxide into the atmosphere (C).
6. Combustion is when fossil fuels or other materials are burned for energy (G).
7. A carbon sink is any reservoir that absorbs more carbon dioxide from the atmosphere than it releases (A).
8. Photosynthesis converts carbon dioxide into organic matter (c).
9. The main source of carbon for plants during photosynthesis is carbon dioxide in the atmosphere (a).
10. During cellular respiration, carbon is released back into the atmosphere as carbon dioxide (b).
11. Oceans contribute to the carbon cycle by absorbing carbon dioxide from the atmosphere (b).
12. Sedimentary rocks contribute to the carbon cycle by storing carbon over long periods of time (b).
13. When fossil fuels are burned for energy, carbon stored in them is released as carbon dioxide (a).
14. Human activities have impacted the carbon cycle by increasing the levels of carbon dioxide in the atmosphere through the burning of fossil fuels (b).
15. Volcanic eruptions contribute to the sudden release of large amounts of carbon dioxide into the atmosphere (b).
16. The main process by which carbon is returned to the soil as nutrients is decomposition (b).

Answer:

1. D
2. F
3. E
4. B
5. C
6. G
7. A
8. c
9. a
10. b
11. b
12. b
13. a
14. b
15. b
16. b