Page 106 - Science Class 6 Times Publication

Chapter
Chapter

10 MIXTURE

Estimated periods: 5

OBJECTIVES

At the end of the lesson, the students will be able to :
Ü di ne the pure and impure substances;

Ü dene mixture and classify it into different types;

Ü explain the methods for the separation of different mixtures.

MIND OPENERS
Ü What do you mean by pure and impure substances?
Ü Are the impure substances useful to us?
Ü Can we separate the components of a mixture?
Ü How do you separate rice from husk?

Ü Observe different substances around you and discuss about their
compositi on.

Introduction
Different things are made of different substances. For example, chair,
table, desk, window, door, book-shelf, etc are made of wood. Book,
copy, paper, magazines, newspapers, etc are made of paper. Similarly,
bucket, bag, raincoat, etc are made of plastics. Wood, paper, plastics,

water, soil, salt, sugar, iron, etc are called substances. The substances
have denite properties and composition. For example, water and oil

are two different substances. They have their own properties. Some of
their properties are similar while some are dissimilar. Both of these
are liquids, hence they have same state. But, water can dissolve salt
in it whereas oil cannot. Water does not have its smell and colour.
But oil has its own smell and colour.

Times' Crucial Science and Environment 102 Book 6