Which statement correctly compares the Moon with an artificial satellite orbiting the Earth?
The Moon is kept in orbit by gravity, but an artificial satellite needs its engines on
Both are kept in orbit by gravity, but only the artificial satellite was made by humans
Both orbit the Sun directly, but only the Moon is held in its orbit by gravity
Both are kept in orbit by gravity, but only the Moon gives out its own light
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.