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Question 19N.3.sl.TZ0.14b

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Date November 2019 Marks available [Maximum mark: 2] Reference code 19N.3.sl.TZ0.14b
Level sl Paper 3 Time zone TZ0
Command term Outline Question number b Adapted from N/A
b.
[Maximum mark: 2]
19N.3.sl.TZ0.14b

Ethanol is a biofuel that can be mixed with gasoline.

(b)

Outline the evidence that relates global warming to increasing concentrations of greenhouse gases in the atmosphere.

[2]

Markscheme

Any two of:
«showing strong» correlation between «atmospheric» CO2 concentration/greenhouse gas concentration and average «global/surface/ocean» temperature ✔

lab evidence that greenhouse gases/CO2 absorb(s) infrared radiation ✔

«advanced» computer modelling ✔

ice core data ✔

tree ring data ✔

ocean sediments / coral reefs / sedimentary rocks data ✔

NOTE: Do not accept “global warming” for “average temperature”.
Do not accept “traps/reflects heat” OR “thermal energy”.
Evidence must be outlined and connected to data.
Accept references to other valid greenhouse gases other than carbon dioxide/CO2, such as methane/CH4 or nitrous oxide/N2O.

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