A dipping compass has a needle that can turn up and down in a vertical plane.
Close to the Earth's magnetic poles, the needle points almost straight down into the ground.
What does this suggest?
Gravity pulls on the needle more strongly near the poles of the Earth
The needle is attracted to iron rocks lying just below the ground
The field lines go steeply into the Earth, so the core is magnetic
The needle is affected by the Earth's field only near the poles
44 exam-style questions on OCR GCSE Physics 4.1 Magnets and magnetic fields, covering 4.1.1 Magnetic poles, attraction and repulsion, 4.1.2 Permanent and induced magnets, 4.1.3 The magnetic field of a magnet, 4.1.4 Compasses and the Earth's magnetic field, 4.1.5 The magnetic field around a current-carrying wire, 4.1.6 Field strength, current and distance, and 4.1.7 Solenoids and electromagnets. Each one has a worked solution and a mark scheme showing where the marks go.