1. What natural resource is being recycled in the image above?
A. Nitrogen
B. Carbon
C. Water
D. Soil
2. How do plants contribute to the carbon sink?
A. Respiration
B. Combustion
C. Fossil fuel formation
D. Peat
3. How does CO2 exit the atmosphere?
A. Photosynthesis
B. Combustion
C. Respiration
D. Decay
4. How does CO2 enter the atmosphere?
A. Photosynthesis
B. Respiration
C. Feeding
D. Waste
5. How many ways can CO2 exit the atmosphere?
A. 1
B. 2
C. 3
D. 4
Answer questions 1 to 5.
1. C. Water
2. A. Respiration
3. C. Respiration
4. B. Respiration
5. B. 2