IB Physics HL B.2.1 Conservation of energy Question Bank

Practise IB Physics HL B.2.1 by balancing atmospheric and surface radiation flows to analyse steady-state energy transfer in climate models.

Exam points

Balance atmospheric and surface radiation flows to calculate missing intensities and steady-state energy transfer.
Explain constant temperature by equating heater input with radiative losses, not by naming equilibrium alone.

[Maximum number: 1]

The diagram shows a simple model of the energy balance in the Earth surface-atmosphere system. The intensities of the radiations are given.

What is the average intensity radiated by the atmosphere towards the surface?

$100 \mathrm{Wm}^{-2}$

$150 \mathrm{Wm}^{-2}$

$240 \mathrm{Wm}^{-2}$

$390 \mathrm{Wm}^{-2}$

All question bank results loaded