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Date May 2017 Marks available 1 Reference code 17M.1.SL.TZ1.19
Level Standard level Paper Paper 1 Time zone Time zone 1
Command term Question number 19 Adapted from N/A

Question

Which characteristic of water vapour classifies it as a greenhouse gas?

A. It absorbs and then re-emits some of the long wave radiation emitted by the Earth’s surface.

B. It prevents short wave radiation from reaching the Earth’s surface.

C. It absorbs UV radiation but does not re-emit it.

D. It absorbs infra-red radiation but does not re-emit it.

Markscheme

A

Examiners report

[N/A]

Syllabus sections

Core » Topic 4: Ecology » 4.4 Climate change
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