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Show on a big screenA cook picks small stones out of rice. Then she washes the rice.
This is Chapter 9 of your NCERT book. It is Methods of Separation in Everyday Life.
Why separate, and six ways to do it
- Why separate — keep what you want, remove what you do not.
- By size — sieving and handpicking.
- By weight — winnowing, with moving air.
- Settling — heavy bits sink when left still.
- Filtering — catches solid bits. It cannot catch what has dissolved.
- Getting it back — evaporate the water. The dissolved solid stays.
- With a magnet — pulls iron out. Leaves the sawdust.
Each method uses one real difference between the parts.
Salt in water is dissolved: you cannot see it. Sawdust is the fine powder left when wood is cut.