DP Physics (first assessment 2025)

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Question 22M.1A.SL.TZ1.29

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1A.SL.TZ1.29
Level SL Paper 1A Time zone TZ1
Command term Question number 29 Adapted from N/A
29.
[Maximum mark: 1]
22M.1A.SL.TZ1.29

Three mechanisms that affect the composition of the atmosphere of the Earth are:

I.   Loss of forests that would otherwise store carbon dioxide – CO2
II.  Release of methane – CH4 by the digestive system of grazing animals
III. Increase of nitrous oxide – N2O due to extensive use of fertilizer

Which of these statements describe a process that contributes to global warming?

A.  I and II only

B.  I and III only

C.  II and III only

D.  I, II and III

[1]

Markscheme

D

Examiners report

This question was well answered by candidates, although option A was a frequent distractor suggesting candidates may be less clear about the role of nitrous oxide in global warming.

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