
On Saturday morning, Mira swept a horseshoe magnet over a tray of treasures. She wanted to discover what the magnet would pull.
Why Can Magnets Pull Some Things but Ignore Others?Magnets pull strongly on materials like iron because their tiny magnetic parts can line up, while many other materials do not respond that way.
1. On Saturday morning, Mira swept a horseshoe magnet over a tray of treasures. She wanted to discover what the magnet would pull.
2. The paper clips jumped up and clung to the magnet. The wooden button and glass marble stayed put.
3. Mira tried the copper coin and the aluminum foil. The magnet ignored both, as if they were not there.
4. Then Mira tested the iron nail. It stuck fast, just like the paper clips. Why did iron answer when the other things did not?
5. Mira imagined the nail up close. Inside iron are tiny magnetic parts, and many of them can line up together.
6. When those tiny parts line up, their pulls join together. The magnet can then pull the iron strongly, but many other materials do not line up that way.
7. Mira tested everything once more. Magnets pull strongly on materials like iron because their tiny magnetic parts can line up, while many other materials do not respond that way.
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