NCERT Solutions for Curiosity Chapter 9 Methods of Separation in Everyday Life
Updated on 2026-09-05
About this chapter
The chapter travels with Malli and Valli across India — Haryana, Ahmedabad, Puducherry, Bhopal and Shillong — and at every halt they meet one more way of separating a mixture (two or more substances mixed together). Solid–solid mixtures are separated by handpicking (difference in size, colour and shape), threshing (beating stalks to free the grain), winnowing (difference in weight, using wind) and sieving (difference in particle size). Solid–liquid mixtures are separated by sedimentation (heavier insoluble particles settle), decantation (the liquid is gently poured off) and filtration (the liquid passes through fine pores, the solid stays back as residue and the liquid collected is the filtrate ). A dissolved solid cannot be filtered out. It is recovered by evaporation — as in the salt pan
- –164Chapter opening
- Rubbing and blowing roasted peanuts
- Separating grains from husk
- –167Winnowing indoors, and sieving the atta
- –168Sabarmati Ashram, and where common salt comes from
- Drops of salt solution on black paper
- Heating salt solution in a china dish
- –171Dada makes tea
- Filtering muddy water through a filter paper
- Building a low-cost water filter
Exercises
- –164Chapter opening — In-text Questions Page 163
- Rubbing and blowing roasted peanuts — Activity 9.1: Let us explore Page 165
- Separating grains from husk — In-text Questions Page 165
- –167Winnowing indoors, and sieving the atta — In-text Questions Page 166
- –168Sabarmati Ashram, and where common salt comes from — In-text Questions Page 167
- Drops of salt solution on black paper — Activity 9.2: Let us observe and create Page 168
- Heating salt solution in a china dish — Activity 9.3: Let us investigate Page 169
- –171Dada makes tea — In-text Questions Page 170
- Filtering muddy water through a filter paper — Activity 9.4: Let us experiment Page 171
- Building a low-cost water filter — Activity 9.5: Let us design and create Page 172
- –174River pollution, churning at the dhaba, and the carpenter’s magnet — In-text Questions Page 173
- –176Two baskets — Activity 9.6: Let us play Page 175
- –178Tank 1: methods · Tank 2: what each one does — Play a Game — WISE FISH Page 177
- –180Exercise questions 1 to 10 — Let us enhance our learning Page 178
- –181Projects, play and thinking like a scientist — Learning further Page 180