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IB Physics HL B.2.4 Earth’s albedo variation Question Bank

Practise IB Physics HL B.2.4 by analysing spatial and temporal albedo changes and their effect on Earth’s radiation budget.

Syllabus
First assessment 2025
Course
Physics HL
Level
HL

Exam points

  • Evaluate how latitude, season, cloud cover and surface type alter an average planetary albedo.
  • Link albedo variation to local absorbed solar power and the radiation budget of Earth.

B.2.4—Earth’s albedo variation question 1

[Maximum number: 2]

This question is in two parts. Part 1 is about the use of renewable energy sources. Part 2 is about the gravitational potential of the Earth.

Energy resources such as La Rance tidal power station could replace the use of fossil fuels. This may result in an increase in the average albedo of Earth.

State two reasons why the albedo of Earth must be given as an average value.
1.
2.

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