Track quiz
Six methods, six real differences. Use the table if you get stuck.
| Lesson | The rule |
|---|---|
| Why separate | Keep what you want, remove what you do not, or both. |
| By size | A sieve checks size only. Not weight, not colour. |
| By weight | Winnowing needs moving air and a real gap in weight. |
| Settling | Left still, heavy bits sink. Then decant. |
| Filtering | A filter catches solid bits. Not what has dissolved. |
| Getting it back | Evaporating the water leaves the dissolved solid behind. |
| With a magnet | A magnet pulls iron and steel. It does not pull sawdust. |
A man swirls a pan of river sand to find gold. Why does he separate it?
A sieve has holes that a pebble fits through. What happens to the pebble?
Wheat and husk are tossed up on a day with no wind. What happens?
A jar of muddy water is left still for a night. What is at the bottom?
Muddy water has settled. What is the name for pouring off the clear top?
Salty water is poured through filter paper. What passes through?
6 spoons of salt are dissolved in water. All the water evaporates. How much salt is in the dish?
Iron nails are mixed with sawdust. Which method pulls out the nails?
Now read your NCERT chapter. Next: Living Creatures: Exploring their Characteristics.