An atmospheric research institute compares recorded global temperature increases with the results from two climate models.
Model H includes human emissions and natural factors. Model N includes only natural factors.
| Year | Recorded global temperature increase since 1900 (∘C^\circ\mathrm{C}∘C) | Increase predicted by Model H (∘C^\circ\mathrm{C}∘C) | Increase predicted by Model N (∘C^\circ\mathrm{C}∘C) |
|---|---|---|---|
| 1970 | 0.29 | 0.27 | 0.24 |
| 1980 | 0.43 | 0.40 | 0.26 |
| 1990 | 0.60 | 0.57 | 0.28 |
| 2000 | 0.76 | 0.78 | 0.30 |
| 2010 | 0.94 | 0.92 | 0.31 |
| 2020 | 1.18 | 1.15 | 0.32 |
Which conclusion is best supported by these results?
The results support Model N because it predicts warming in every year shown.
The results support including human emissions because Model H is consistently closer to the recorded increases.
The results support giving both models equal weight because both predict warming in every year shown.
The results support rejecting Model H because it does not reproduce each recorded increase exactly.
109 exam-style questions on OCR GCSE Chemistry 6.3 Interpreting and interacting with earth systems, covering 6.3.1 Formation and evolution of the atmosphere, 6.3.2 The greenhouse effect and climate change, 6.3.3 Sources and problems of atmospheric pollutants, and 6.3.4 Producing potable water. Each one has a worked solution and a mark scheme showing where the marks go.