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
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 dioxide ... show full transcript
Worked Solution & Example Answer: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.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The main trend shown in the graph is an increase in carbon dioxide concentration over time. This indicates a positive correlation, as the levels of carbon dioxide have been rising steadily from 1958 to 1992.
Step 2
Calculate the difference in atmospheric carbon dioxide concentration in Europe between 1980 and 1990.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
To find the difference in atmospheric carbon dioxide concentration, we take the values from 1990 and 1980.
Concentration in 1990: 355 parts per million (ppm)
Concentration in 1980: 339 ppm
The difference is calculated as:
355extppm−339extppm=16extppm
Thus, the difference in atmospheric carbon dioxide concentration is 16 parts per million.
