5. Carbon dioxide concentration in the air is thought to be changing as a result of human population increase - Edexcel - GCSE Biology - Question 5 - 2011 - Paper 1
Question 5
5. Carbon dioxide concentration in the air is thought to be changing as a result of human population increase.
The graph shows how the concentration of carbon dioxi... show full transcript
Worked Solution & Example Answer:5. Carbon dioxide concentration in the air is thought to be changing as a result of human population increase - Edexcel - GCSE Biology - Question 5 - 2011 - Paper 1
Step 1
Describe the main trend shown in the graph.
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Answer
The graph shows a positive correlation in the concentration of carbon dioxide over time. Specifically, there is a consistent increase in carbon dioxide levels from 1958 to 1992.
Step 2
Calculate the difference in atmospheric carbon dioxide concentration in Europe between 1980 and 1990.
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Answer
To find the difference, we take the concentration in 1990, which is 355 parts per million (ppm), and subtract the concentration in 1980, which is 339 ppm. Thus, the calculation is:
355extppm−339extppm=16extppm
Therefore, the difference in atmospheric carbon dioxide concentration is 16 parts per million.
