Page 114 - Science Class 6 Times Publication

solids in which one is soluble in water
and the other is not. In this method,
the mixture is poured slowly over

a ltering material such as cotton

cloth, lter paper, glass wool,  ltering
candle, etc. When the mixture is

poured over a ltering material, the
liquid part of the mixture passes
easily through it but the insoluble

solid particles remain collected on the ltering material. Thus, the
process of separating an insoluble solid from a liquid by using a
ltering material is called  ltration.

We use the process of ltration at our home to clean our drinking

water. A water lter is used at our home which lters water with a

ltering candle. Similarly, we separate tea particles from tea using a
strainer or a tea lter. In country areas, people use a thin cotton cloth

to lter water. Similarly, in the science lab, we use a lter paper to

separate the components of sand and water, muddy water, etc.
Activity 10.4

To separate the mixture of sand and water

Materials required

A beaker, lter paper, funnel, stand, a glass rod, mixture of sand and
water, etc.
Procedure

1. Take a mixture of sand and water in a beaker.

2. Take a piece of lter paper and fold it to make two equal halves
so that you get a semicircle. Again fold the semicircle into two
equal halves so that you get a triangle.

3. Now, open the lter paper by lifting one sheet alone from three
others. You will get a cone shaped lter paper.

Times' Crucial Science and Environment 110 Book 6