Two models can both explain the apparent daily movement of the Sun across the sky. A telescope then reveals moons orbiting Jupiter.
Why is this new observation useful when comparing the models?
It confirms the claim that every object orbits the Earth.
It challenges the claim that the Moon orbits the Earth.
It challenges the claim that every object orbits the Earth.
It confirms the claim that the Sun orbits the Earth.
80 exam-style questions on Edexcel GCSE Physics 7.1 The Solar System and gravity, covering 7.1.1 Weight and g on different bodies in space, 7.1.2 The Solar System, 7.1.3 Changing ideas about the Solar System, 7.1.4 Orbits of moons, planets, comets and satellites, and 7.1.5 Gravity and orbital motion. Each one has a worked solution and a mark scheme showing where the marks go.