Scientists cannot see inside the Earth. However, observations using compasses give evidence that the core of the Earth is magnetic.
Explain how plotting compasses can be used to show the shape and direction of the magnetic field around a bar magnet, and how the behaviour of compasses on the Earth provides evidence that the core of the Earth is magnetic.
70 exam-style questions on Edexcel GCSE Physics 12.1 Magnets and magnetic fields, covering 12.1.1 Magnetic poles, 12.1.2 Magnetic materials; permanent and induced magnets, 12.1.3 Magnetic fields, and 12.1.4 Plotting compasses and the Earth's magnetic field. Each one has a worked solution and a mark scheme showing where the marks go.