Page 74 - Science - 5

Observe this powder through a magnifying glass. You will see that this powder
is made of even tinier particles. These particles are made up of sugar

molecules.
Properties of Molecules
Properties of MoleculesProperties of Molecules
Some common properties of molecules are given below :

w Molecules cannot be seen.

w Molecules of various substances have different
weight, shape and size.
w Molecules in various substances are arranged
differently.

w Molecules can be broken into smaller units
which are called atoms .

How substances differ from each other?
Let us compare a football and a basketball. Football
How are they alike?
w They both occupy space .

w They both have a circular shape .
w They both have weight .
How are they different ?

w The football is bigger than the basketball.
w A football comes in three sizes but a basketball
has a single size.
w A football has generally black and white colours

but a basketball is orange-brown in colour. Basketball

We can find out likenesses and differences between objects by comparing
their shapes, sizes, colour etc. The objects differ from each other because
they are made of different molecules.
An object can be made of more than one type of molecules. Sharpen your

pencil and look at the pencil shavings. What do you notice? you will see brown
coloured wood particles and black coloured graphite particles. A pencil is
made of two different matters, that are wood and graphite. The pencil point

you write with and is made of a material called graphite .

Testing Zone

Take an apple and cut into small pieces. Now, eat them. Do these pieces
differ in taste when you eat a whole apple? No, these have the same taste.

Taste some sugar grains and some sugar powder. They taste the same.

75
75
Discover 75 Science/5