Which statement explains how the Earth's atmosphere keeps the surface of the Earth warmer than it would be with no atmosphere?
It absorbs most of the visible light from the Sun before it reaches the ground
It reflects all of the infrared radiation from the Sun back into space
It absorbs some infrared emitted by the surface and emits some back towards it
It stops the surface of the Earth from emitting any infrared radiation at all
50 exam-style questions on OCR GCSE Physics 8.3 Beyond Earth, covering 8.3.1 Red-shift and the expanding universe, 8.3.2 Evidence for the Big Bang model, 8.3.3 Formation of the Sun and stellar equilibrium, 8.3.4 Radiation emitted by hot bodies, 8.3.5 The solar system and satellites, 8.3.6 Gravity and circular orbits, 8.3.7 Orbital radius and orbital speed, 8.3.8 Radiation balance and the temperature of the Earth, and 8.3.9 Seismic waves and exploring hidden structures. Each one has a worked solution and a mark scheme showing where the marks go.