Mon Prof Augmenté
Separating Sand and Salt from Water
Water can carry sand that stays in lumps and salt that dissolves into it. Filtering traps the sand, and heating the liquid drives the water away as steam so the salt is left behind.
This picture is part of the full library
Every lesson is open to everyone for 7 days after it is published. This one came out on September 5, 2026: its text stays readable here, and its picture opens with a subscription.
The app is free. A subscription opens every lesson, in every school year.
Age 12: open this week
Browse Age 12
In the picture
- The beaker of cloudy water holding sand and dissolved salt.
- The wet sand caught in the folded filter paper inside the funnel.
- The clear salty liquid collecting in the conical flask after passing through the filter.
- The evaporating basin heated over the burner, where water leaves as steam.
- The white salt crystals left behind in the cooled second basin.
Examples
- Pouring tea through a strainer so the leaves stay behind.
- Sea salt forming in shallow salt pans as the sun dries the seawater.
Key takeaways
- Filtering separates a solid that does not dissolve from a liquid.
- Evaporation recovers a dissolved solid, because only the water turns to gas.
Carry on in the app
Three questions on this lesson. It has left the free week, so its quiz is for subscribers.
At least one new illustrated lesson every weekday for your child’s year, with its quiz and a reminder at 6:15 pm.
Get the app
Free app, optional subscription
App Store Google Play
