Permanent and Induced Magnetism
A study of magnetic poles, magnetic fields, and the difference between permanent and induced magnets. Students will map magnetic fields using compasses.
TL;DR:Magnetism is a fundamental force that students explore through the properties of magnetic poles and fields. They learn that like poles repel and unlike poles attract, and they use plotting compasses to map the invisible magnetic field lines around a bar magnet. The curriculum distinguishes between permanent magnets, which produce their own magnetic field, and induced magnets, which only become magnetic when placed in a field.
About This Topic
Magnetism is a fundamental force that students explore through the properties of magnetic poles and fields. They learn that like poles repel and unlike poles attract, and they use plotting compasses to map the invisible magnetic field lines around a bar magnet. The curriculum distinguishes between permanent magnets, which produce their own magnetic field, and induced magnets, which only become magnetic when placed in a field.
This topic is essential for understanding the Earth's magnetic field and how navigation works. It also serves as the prerequisite for electromagnetism and the motor effect. In the UK National Curriculum, students must be able to describe the direction of magnetic field lines (from North to South) and explain why certain materials, like iron, steel, cobalt, and nickel, are magnetic.
This topic comes alive when students can physically manipulate magnets and use collaborative mapping to visualise the field lines.
Key Questions
- How do magnetic poles interact?
- What is the difference between a permanent and an induced magnet?
- How can we visualise a magnetic field?
Watch Out for These Misconceptions
Common MisconceptionAll metals are magnetic.
What to Teach Instead
Many students think aluminium or copper are magnetic. A hands-on 'sorting' activity with various metal samples quickly corrects this by showing that only a few specific metals respond to a magnet.
Common MisconceptionMagnetic field lines actually exist as physical wires.
What to Teach Instead
Clarify that field lines are just a mathematical way to represent the strength and direction of the force. Using iron filings helps students see the 'pattern' without thinking the lines are solid objects.
Active Learning Ideas
See all activities→Inquiry Circle
Mapping the Field
Pairs use a bar magnet and multiple small plotting compasses to trace the magnetic field lines on a large sheet of paper. they must ensure the arrows always point from North to South.
Stations Rotation
Magnetic Materials Challenge
Students visit stations with various mystery metals. They must use a magnet to identify which are magnetic and then determine if they are permanent or induced magnets based on their behaviour.
Think-Pair-Share
The Earth as a Magnet
Students are shown a diagram of the Earth's magnetic field. They must discuss with a partner why a compass points North and what would happen if the Earth's magnetic poles flipped.
Frequently Asked Questions
What is an induced magnet?
Which direction do magnetic field lines go?
Why does a compass point North?
How can active learning help students understand magnetism?
Planning templates for Combined Science
5E Model
The 5E Model structures lessons through five phases (Engage, Explore, Explain, Elaborate, and Evaluate), guiding students from curiosity to deep understanding through inquiry-based learning.
Unit PlannerThematic Unit
Organize a multi-week unit around a central theme or essential question that cuts across topics, texts, and disciplines, helping students see connections and build deeper understanding.
RubricSingle-Point Rubric
Build a single-point rubric that defines only the "meets standard" level, leaving space for teachers to document what exceeded and what fell short. Simple to create, easy for students to understand.
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