LuduminaMG-02 · MG-U1 · Planned
Mapping magnetic fields
Learning objectives
Use a compass to plot field direction; interpret line density and Earth’s magnetic field.
8463 §§4.7.1.2 / 8464 §§6.7.1.2
DfE single-science pp.41–42 / Combined pp.34–35. Evidence checked 30 September–1 October 2026. Skills: WS1.2,2.2,2.6; MS5b.
Needs firstMG-01
Explanation
A compass north-seeking end indicates local magnetic field direction. Outside a bar magnet, arrows run from north to south and line density represents strength in the drawing. Lines describe a field model, not visible material threads.
Concepts, equations and units: Field direction defined by force on north test pole; outside bar magnet N→S; strongest near poles; model field lines.
Prediction, demonstration and game exercise
Predict, observe, explain
Plot compass directions point by point; show Earth’s compass alignment as evidence for a magnetic interior.
Planned learner game exercise
Place virtual compass samples, trace field curves and compare strengths at distances.
Independent practice
Draw two annotated field diagrams and explain compass orientation.
Original practice example · Shared
Which way do field arrows run outside a bar magnet, and where are lines most densely drawn?
Show working and model answer
Working / reasoning
The direction is the force on a north test pole; field is strongest near the poles.
Answer
North to south outside; densest near poles.
Exit check and success criteria
Consistent arrows, denser lines near poles and correct direction definition.
During practice, compare the prediction with evidence and give an error-specific prompt. The exit item uses a fresh context or fresh values, answered independently.
Misconceptions, practical links and mastery
Check these misconceptions
Field lines are strings; compass points at the nearest drawn line; magnetic and geographic north are identical concepts.
Practical preparation
Optional compass field plotting; no RP.
Virtual preparation and revision only. Required hands-on activities and school records remain separate.
Proposed mastery
0: not yet evidenced. 1: supported. 2: independent exit criteria met. 3: successful changed-context transfer. Advance at 2; revisit with fresh retrieval. These are not GCSE grades.