EMF DO #1 Post Activity Discussion 1.Describe how your model system demonstrated the magnetic force strength in the field. 2.Did lines of force cross each other in your model system? Explain. 3.Were you able to visually see the polar direction of magnetic force in the lines of iron filings? 4.How did the iron filing patterns show attractive forces between magnetic poles? 5.How did the iron filing patterns show repulsive forces between magnetic poles? 6.Use the direction of magnetic force shown on your diagrams to explain why the magnetic fields repelled or attracted.

EMF DO #1 Post Activity Discussion 1.Describe how your model system demonstrated the magnetic force strength in the field. The iron filings packed close together where the strength of the magnetic force was the strongest (near the poles and near the magnet). 2. Did lines of force cross each other in your model system? Explain. No, the iron filings tended to form lines that were next to each other but did not cross each other. 3.Were you able to visually see the polar direction of magnetic force in the lines of iron filings? No, direction had to be assumed.

EMF DO #1 Post Activity Discussion 4.How did the iron filing patterns show attractive forces between magnetic poles? Iron filings were present and lined up. 5.How did the iron filing patterns show repulsive forces between magnetic poles? Iron filings were not present and pushed away. 6.Use the direction of magnetic force shown on your diagrams to explain why the magnetic fields repelled or attracted. If poles align and are alike, they repel; if they are opposite, they attract.

Part 1 – One Magnet

Part 2 – Two Magnets, end-to-end (N-S)

Part 3 – Two Magnets, end-to-end (N-N)

Part 4 – Two Magnets, Side-by-side (N- S)

Part 5 – Two Magnets, Side-by-side (N- N)