Question

Answer the following questions in short. (Any three) 06

1) How can panner be made at home ?

2) How will you separate sand and water from their mixture ?

3) Why does a lump of cotton wool shrink in water ?

4) How do plants and animals help each other by exchanging

gases in the atmosphere ?​

Answer 1

Explanation:

1. In a mixture of sand and water, the heavier sand particles would settle down at the bottom. So, the water can be separated by decantation process.
2. Filtration can also be used to separate components of a mixture of an insoluble solid and a liquid.
3. lump of cotton wool has a lot of air trapped inside the space present in its fibers. When this lump of cotton is immersed in water, all the air is replaced by water. Due to this, the cotton lump shrinks.