A cloud of dust and gas is pulled together to form a protostar. What happens to the temperature of the material as this happens?
It stays the same, because no energy is transferred to the material.
It decreases, because the material spreads out into a larger volume.
It decreases, because energy is transferred away from the material.
It increases, because the particles gain energy as they are pulled in.
41 exam-style questions on AQA GCSE Physics 8.1 Solar system; stability of orbital motions; satellites, covering 8.1.1 Our solar system, 8.1.2 The life cycle of a star, and 8.1.3 Orbital motion, natural and artificial satellites. Each one has a worked solution and a mark scheme showing where the marks go.