IB Physics SL B.2.9 Greenhouse Models

Practise constructing a molecular greenhouse explanation from Earth's spectrum, resonance and isotropic re-emission, then using model assumptions to predict surface-temperature…

Syllabus
First assessment 2025
Objective
Level
SL

Exam points

  • calculate or compare molecular natural frequency with the frequency of terrestrial infrared radiation
  • sequence surface emission, resonant absorption and random atmospheric re-emission in the model
  • predict lower surface temperature without greenhouse gases because less outgoing infrared returns downward

B.2.9—Greenhouse models question 1

[Maximum number: 3]

This question is about energy sources.

A small island is situated in the Arctic. The islanders require an electricity supply but have no fossil fuels on the island. It is suggested that wind generators should be used in combination with power stations using either oil or nuclear fuel.

The emissions from the oil-fired power station in (c) are likely to increase global warming by the enhanced greenhouse effect.

Outline the mechanism by which greenhouse gases contribute to global warming.

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