Grade 4 · Science · Lesson 22

Magnetic fields

A magnet produces an invisible region of force around it called a magnetic field. This field can push or pull certain materials without touching them. Magnetic field lines show the direction and shape of the field — they run from the North pole to the South pole outside the magnet.

What this lesson teaches

1Define a magnetic field and describe how it surrounds a magnet
2Identify materials that are attracted to magnets and materials that are not
3Explain why opposite poles attract and like poles repel

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