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Date May 2017 Marks available 2 Reference code 17M.2.SL.TZ1.3
Level Standard level Paper Paper 2 Time zone Time zone 1
Command term State Question number 3 Adapted from N/A

Question

The diagram shows the greenhouse effect.

State the type of wavelength of the radiation labelled X and Y.

X: 

Y: 

[2]
a.

Outline reasons for the change occurring at Z. 

[2]
b.

The short-tailed albatross (Phoebastria albatrus) nests and breeds on remote low-lying coral islands in the Pacific Ocean. Predict how global warming may threaten the survival of such an ocean bird.

[1]
c.

Markscheme

X: short-/ultraviolet/UV/visible/EMR/electromagnetic radiation 

Y: long-/infrared/IR

a.

a. greenhouse gases present (at Z) 

b. greenhouse gases «CO2, methane, nitrous oxide, water vapour» absorb long-wavelengths/infrared
OR
long wavelengths/infrared waves blocked from leaving the atmosphere 

c. (long-wavelengths/infrared absorbed and) reradiated/re-emitted (heat Earth)

b.

a. rising ocean levels/more extreme weather «due to global warming» may destroy breeding/nesting sites 
OR 
rising sea level may put island underwater causing young birds/chicks to drown 

b. populations may not find/adapt to new colony sites 

c. warming seas may affect the food supply

c.

Examiners report

[N/A]
a.
[N/A]
b.
[N/A]
c.

Syllabus sections

Core » Topic 4: Ecology » 4.4 Climate change
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