The concentration of carbon dioxide in the atmosphere has been measured at an observatory in Hawaii since 1958. The table shows some of the results.
| Year | Carbon dioxide concentration / parts per million (ppm) |
|---|---|
| 1960 | 317 |
| 1980 | 339 |
| 2000 | 370 |
| 2020 | 414 |
Name two greenhouse gases, other than carbon dioxide.
Describe how greenhouse gases keep the Earth warm.
Calculate the increase in carbon dioxide concentration from 1960 to 2020.
Calculate the percentage increase in carbon dioxide concentration from 1960 to 2020. Give your answer to 3 significant figures.
Give one human activity that has increased the concentration of carbon dioxide in the atmosphere.
97 exam-style questions on Edexcel GCSE Chemistry 9.2 Earth and atmospheric science, covering 9.2.1 The Earth's early atmosphere, 9.2.2 How the atmosphere evolved, 9.2.3 Chemical test for oxygen, and 9.2.4 The greenhouse effect and climate change. Each one has a worked solution and a mark scheme showing where the marks go.