Magnetic Forces and Fields

Active learning works well for magnetic forces because students need to see and interact with invisible fields to build accurate mental models. Hands-on activities let them test predictions, observe real patterns, and correct misconceptions through direct evidence.

• Year 7
• Science
• 4 activities
• 20 min–45 min

Learning Objectives

1. Compare the attractive and repulsive forces between different magnetic poles.
2. Visualize and sketch the magnetic field lines around bar, horseshoe, and ring magnets.
3. Classify materials as magnetic or non-magnetic based on experimental results.
4. Differentiate between permanent and temporary magnets through hands-on investigation.

Inquiry Circle

⏱ 25 min·Pairs

Pairs: Pole Suspension Test

Suspend two bar magnets from strings at varying distances. Students predict and observe attraction or repulsion between like and opposite poles, then measure closest approach distances. Pairs record results in a table and explain patterns using force diagrams.

Prepare & details

Explain how magnetic poles interact with each other.

Facilitation Tip: For the Pole Suspension Test, ask students to predict which pole will face downward before they hang the magnet, then have them explain any differences between their predictions and results.

Setup: Groups at tables with access to source materials

Materials: Source material collection, Inquiry cycle worksheet, Question generation protocol, Findings presentation template

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Inquiry Circle

⏱ 30 min·Small Groups

Small Groups: Iron Filings Visualization

Place a bar magnet under white paper, sprinkle iron filings evenly, and tap gently to align them. Groups sketch field lines, noting density near poles, then repeat with a horseshoe magnet for comparison. Discuss how patterns reveal field strength.

Prepare & details

Visualize the invisible magnetic fields around different types of magnets.

Facilitation Tip: During the Iron Filings Visualization, remind students to tap the tray gently so filings settle slowly, revealing clearer field lines without obscuring the pattern.

Setup: Groups at tables with access to source materials

Materials: Source material collection, Inquiry cycle worksheet, Question generation protocol, Findings presentation template

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Inquiry Circle

⏱ 20 min·Individual

Individual: Compass Field Mapping

Students slowly move a compass around a magnet, marking north-pointing needle positions to trace field lines. Label poles and arrows for direction. Compare personal maps in a whole-class gallery walk.

Prepare & details

Differentiate between temporary and permanent magnets.

Facilitation Tip: When students do Compass Field Mapping, have them move the compass in small steps to trace each line, preventing gaps that lead to incomplete field models.

Setup: Groups at tables with access to source materials

Materials: Source material collection, Inquiry cycle worksheet, Question generation protocol, Findings presentation template

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Stations Rotation

⏱ 45 min·Small Groups

Stations Rotation: Magnet Types

Set up stations for permanent magnets testing materials, building a simple electromagnet with wire and battery, plotting fields with apps or paper, and pole plotting with multiple magnets. Groups rotate, documenting one key finding per station.

Prepare & details

Explain how magnetic poles interact with each other.

Facilitation Tip: At the Magnet Types station, provide labeled samples and ask students to record observations about strength and field shape before generalizing patterns across types.

Setup: Tables/desks arranged in 4-6 distinct stations around room

Materials: Station instruction cards, Different materials per station, Rotation timer

• Remember
• Understand
• Apply
• Analyze
• Self-Management
• Relationship Skills

Teaching This Topic

Start by having students explore simple magnets to build intuition before formalizing concepts. Avoid front-loading too much vocabulary; let students describe observations in their own words first. Research shows that drawing field lines improves spatial understanding, so include sketching in every activity. Use student predictions and quick tests to surface misconceptions early, then revisit them after evidence is collected.

What to Expect

Successful learning looks like students using evidence from their tests to explain magnetic behavior, sketch accurate field lines, and classify materials correctly. They should connect their observations to the idea that magnetic forces act at a distance and shape fields around magnets.

Watch Out for These Misconceptions

Common Misconception

During Iron Filings Visualization, watch for students assuming all metals are attracted to magnets.

What to Teach Instead

Ask students to test each metal sample with the magnet during the activity and record whether attraction occurs, then have them classify samples as magnetic or non-magnetic based on their own data.

Common Misconception

During Pole Suspension Test, watch for students believing they can separate poles by cutting a magnet.

What to Teach Instead

After students observe the original magnet’s poles, have them predict what will happen if they cut it, then test by cutting a bar magnet and observing that two new magnets with pairs of poles form.

Common Misconception

During Compass Field Mapping, watch for students drawing field lines only between the poles.

What to Teach Instead

Ask students to trace the full loop of each field line around the entire magnet, including areas away from the poles, to correct the idea that fields exist only between poles.

Assessment Ideas

Quick Check

After Pole Suspension Test, provide a collection of materials and ask students to test each one, recording whether it is attracted to the magnet and classifying it as magnetic or non-magnetic based on their observations.

Discussion Prompt

During Iron Filings Visualization, present diagrams of magnet arrangements and ask students to explain what they would observe if they sprinkled iron filings, using their own field line sketches as evidence.

Exit Ticket

After Compass Field Mapping, ask students to draw a horseshoe magnet and sketch the magnetic field lines around it, labeling the poles and writing one sentence comparing a permanent magnet to a temporary magnet.

Extensions & Scaffolding

• Challenge students to design a device that uses magnetic repulsion to keep two objects separated, including a labeled diagram of the magnetic arrangement.
• Scaffolding for struggling students: Provide pre-labeled field line templates and ask them to trace over the lines with a compass to see the pattern.
• Deeper exploration: Have students research how MRI machines use magnetic fields and present a short explanation of how field strength relates to image quality.

Key Vocabulary

Magnetism	A physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects.
Magnetic Pole	The two ends of a magnet, typically labeled North and South, where the magnetic force is strongest.
Magnetic Field	The region around a magnet where its magnetic force can be detected, often visualized by field lines.
Permanent Magnet	A magnet that retains its magnetic properties for a long time without the need for an external magnetic field.
Temporary Magnet	A magnet that is magnetized only when it is in the presence of a magnetic field, such as an electromagnet.