4.6.3.3 A magnetic compass Explain how the 1 Draw the magnetic field How does a compass contains a small bar magnet. behaviour of a pattern of a bar magnet and work? The Earth has a magnetic magnetic compass is describe how to plot the Why would a compass field. The compass needle related to evidence magnetic field pattern using a sometimes point in the points in the direction of the that the core of the compass. wrong direction (eg not Earth’s magnetic field. Earth must be Describe how a compass can to the North Pole in the magnetic. The Earth’s magnetic field is be made using a needle UK)? probably caused by floating on a leaf once it has Try making a compass movements in the liquid, been magnetised by a a needle and a part of the outer core of permanent magnet. permanent magnet. the Earth. The slow changes Explain how the behaviour of a Suspend a permanent to the positions of the magnetic compass is related to magnet so it is free to magnetic north and south evidence that the core of the rotate. Check the poles and the way that field Earth must be magnetic. direction it points with an reverses its direction from Investigate the magnetic field actual compass. time to time show that the pattern of the Earth. magnetism of the core is dynamic and not static. The Question for students to intervals between reversals consider (think-pair-share): are not uniform. The last What is the shape of the reversal happened about Earth’s magnetic field? 800,000 years ago. WS 1.3 Explain why the data needed to answer a scientific question, in a given context, may not be
4.6.3.3 A magnetic compass contains a small bar magnet. The Earth has a magnetic field. The compass needle points in the direction of the Earth’s magnetic field. The Earth’s magnetic field is probably caused by movements in the liquid, part of the outer core of the Earth. The slow changes to the positions of the magnetic north and south poles and the way that field reverses its direction from time to time show that the magnetism of the core is dynamic and not static. The intervals between reversals are not uniform. The last reversal happened about 800,000 years ago. Explain how the behaviour of a magnetic compass is related to evidence that the core of the Earth must be magnetic. 1 Draw the magnetic field pattern of a bar magnet and describe how to plot the magnetic field pattern using a compass. Describe how a compass can be made using a needle floating on a leaf once it has been magnetised by a permanent magnet. Explain how the behaviour of a magnetic compass is related to evidence that the core of the Earth must be magnetic. Investigate the magnetic field pattern of the Earth. Question for students to consider (think-pair-share): What is the shape of the Earth’s magnetic field? WS 1.3 Explain why the data needed to answer a scientific question, in a given context, may not be How does a compass work? Why would a compass sometimes point in the wrong direction (eg not to the North Pole in the UK)? Try making a compass a needle and a permanent magnet. Suspend a permanent magnet so it is free to rotate. Check the direction it points with an actual compass.
AQA-8465-SOW-ISLD.DOCX