Magnetic Separation of Sand and Iron Filings

Students mix sand and iron filings, then use a magnet to separate the iron filings from the sand. This demonstrates how differences in physical properties, like magnetism, can be used to separate mixtures.

1. Place equal amounts of sand and iron filings into a plastic cup.
2. Stir the mixture with a plastic spoon until well mixed.
3. Ask students to predict what will happen when a magnet is placed near the mixture.
4. Slowly bring a magnet close to the mixture. The iron filings will cling to the magnet, while the sand remains in the cup.
5. Move the magnet over a second cup and carefully remove the iron filings by tapping or wiping the magnet, allowing them to fall into the new cup.
6. Repeat the process until all the iron filings have been separated from the sand.

Separating iron filings from sand - Chemistry NOTES:

Sample Science Lesson - Junior HighSchool Science - Separating an iron, sand and salt mixture - Make Science Fun:

📄 Magnetic Separation Lab Activity - cK-12: https://www.ck12.org/flexi/physical-science/magnet/make-a-simple-lab-work-for-elementary-students-involving-techniques-in-separating-mixtures-such-as-using-magnets/

• Try separating different mixtures, such as paper clips mixed with rice, or coins mixed with buttons.
• Add salt, and separate this by adding water and filtering.
• Cover the magnet with a thin plastic bag or cling film for easier removal of the iron filings.
• Test which classroom objects are magnetic before starting the experiment.

• Ensure students do not place magnets near electronic devices or credit cards.
• Remind students not to put iron filings near their eyes, mouth, or nose.
• Wash hands after handling the materials.

• Why does the magnet attract iron filings but not sand? (Because iron is magnetic, while sand is not.)
• Can all metals be separated with magnets? (No, only ferromagnetic metals like iron, cobalt, and nickel respond strongly to magnets.)
• Where is magnetic separation used in everyday life? (In recycling, mining, and food safety to remove metal contaminants.)
• How could we separate mixtures where magnetism doesn’t work? (By using other methods such as filtration, evaporation, or sieving.)