Basic HTML Version

|  | Table of Contents |  | View Full Version

Page 23
P. 23
Properties of Air
Air occupies space
Air occupies space.
As you see when we blow a balloon,
its size becomes larger and larger.
It is because of air.
It shows that air occupies space.
Air has weight
Air has weight. It will be clear
by following activity.
Put an empty (flat) football in
one pan of weighing scale and air
filled football in other pan.
Pan of air-filled football will
lean to one side.
It shows that air has weight.
Let’s Answer
Fill in the blanks:
1. We cannot ___________ air but we can ___________ .
2. Slow moving air is called ___________ .
Air is needed for burning
Oxygen (a constituent of air) helps in
burning. It will be more clear by following
activity.
Take two candles and light them.
Cover one lighted candle with glass jar.
Book-1 # 23

| 18 19 20 21 22 23 24 25 26 27 28 |