| Date | May 2017 | Marks available | 1 | Reference code | 17M.2.SL.TZ1.3 |
| Level | Standard level | Paper | Paper 2 | Time zone | Time zone 1 |
| Command term | Predict | 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:
Outline reasons for the change occurring at Z.
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.
Markscheme
X: short-/ultraviolet/UV/visible/EMR/electromagnetic radiation
Y: long-/infrared/IR
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)
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
