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Explain what causes the changes in the carbon dioxide concentration in the air: * from 0 to 6 hours - AQA - GCSE Biology - Question 6 - 2023 - Paper 2
Question 6
Explain what causes the changes in the carbon dioxide concentration in the air: * from 0 to 6 hours. * from 8 to 12 hours. Use information from Figure 9.
Worked Solution & Example Answer:Explain what causes the changes in the carbon dioxide concentration in the air: * from 0 to 6 hours - AQA - GCSE Biology - Question 6 - 2023 - Paper 2
Step 1
from 0 to 6 hours.
Answer
During the first 0 to 6 hours of the day, the concentration of carbon dioxide in the air decreases. This is primarily due to the lack of sunlight, which means that photosynthesis does not occur. Therefore, respiration by plants and decomposers continues to take place, but without the offset from photosynthesis, the result is a net release of carbon dioxide.
Step 2
from 8 to 12 hours.
Answer
In the period from 8 to 12 hours, as sunlight increases, photosynthesis becomes more prominent. The rate of photosynthesis surpasses that of respiration. Consequently, plants absorb more carbon dioxide, leading to a notable decrease in the carbon dioxide concentration in the air during this time.