The average temperature of the Earth depends on the balance between the radiation it absorbs and the radiation it emits.
Explain how this balance controls the Earth's average temperature, and how an increase in greenhouse gases and the melting of polar ice could each change the Earth's average temperature.
96 exam-style questions on Edexcel GCSE Physics 5.3 Black body radiation, covering 5.3.1 Emission of radiation and temperature, 5.3.2 Radiation balance and constant temperature, and 5.3.3 The temperature of the Earth. Each one has a worked solution and a mark scheme showing where the marks go.