Day 07: Separating Mixtures – Filtration & Evaporation
Preparatory Stage Science | Apex Institute of Maths and Sciences
🔍 The Magic of Separation
Imagine you accidentally drop a spoonful of salt into a glass of water, or some sand into your juice! Are they ruined forever? No! Scientists use special “superpowers” to separate things that are mixed together. Today, we learn two of the most important tricks: Filtration and Evaporation.
- Filtration: Like using a sieve for pasta, it separates solids that do not dissolve (insoluble) from liquids.
- Evaporation: Turning a liquid into gas (vapor) to leave behind the solids that did dissolve (soluble).
🧪 Tools of the Trade
If it’s disappeared into the water (like salt), Boil it!
| Method | Separates… | Tool Used |
|---|---|---|
| Filtration | Sand from Water | Filter Paper/Sieve |
| Evaporation | Sugar from Water | Heat/Sunlight |
🌍 Real World Science
When your parents make tea, they use a strainer to catch the tea leaves but let the liquid tea fall into the cup. This is Filtration! The leaves are “insoluble” in the liquid.
Sea salt is made by letting seawater sit in shallow pools under the hot sun. The water evaporates into the air, leaving behind pure salt crystals. This is Evaporation!
🏠 Mission at Home
Ask a parent for a sieve and a bowl. Mix some uncooked rice with water. Try to separate them using the sieve. Record what stayed in the sieve and what went into the bowl!
Mix 1 spoon of salt into a tiny bit of water until it disappears. Leave the saucer in a sunny window for a day. Look closely the next morning—what did the sun leave behind?
