| Date | May 2016 | Marks available | 2 | Reference code | 16M.2.HL.TZ0.9 |
| Level | Higher level | Paper | Paper 2 | Time zone | Time zone 0 |
| Command term | Suggest | Question number | 9 | Adapted from | N/A |
Question
The Sun has a radius of 7.0×108m and is a distance 1.5×1011 m from Earth. The surface temperature of the Sun is 5800 K.
The average surface temperature of the Earth is actually 288 K.
Suggest how the greenhouse effect helps explain the difference between the temperature estimated in (c) and the actual temperature of the Earth.
Markscheme
the emitted radiation is in the infrared/IR/long wavelength/low frequency region
«greenhouse» gases in the atmosphere absorb «infrared» radiation
radiated in all directions «including back down to Earth» warming the Earth
Do not allow “traps the heat”.
Must see clear implication somewhere in response that gases are in the atmosphere for MP2.
Must see sense that Earth temperature is raised for MP3.
Examiners report
[N/A]
Syllabus sections
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