| Date | May 2018 | Marks available | 1 | Reference code | 18M.1.SL.TZ2.29 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 29 | Adapted from | N/A |
Question
Three gases in the atmosphere are
I. carbon dioxide (CO2)
II. dinitrogen monoxide (N2O)
III. oxygen (O2).
Which of these are considered to be greenhouse gases?
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
Markscheme
A
Examiners report
[N/A]
Syllabus sections
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