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One Among All Multiple Choice Questions (MCQs)
One Among All Multiple Choice Questions (MCQs)

Tick ( ) the correct option : ü

1. We have ___________ layers of atmosphere.
(a) two (b) four (c) three (d) five
2. We need ___________ to breathe in.

(a) fresh air (b) nitrogen
(c) carbon dioxide (d) polluted air

3. How many types of water impurities are there?
(a) Three (b) Four (c) Two (d) Six
4. The ___________ layer prevents the ultraviolet rays of Sun from reaching the
Earth.

(a) oxygen (b) nitrogen
(c) ozone (d) helium

5. We have ___________ of water on the Earth.
(a) 50% (b) 60% (c) 80% (d) 75%

High Order Thinking Skill (HOTS)

1. A soda water bottle can burst if it is put in a freezer for a long time. Why?
2. Why does not soap remove easily from the body, when we take a bath with water

in hilly area?

LEARNING BY PLAYING

1. Match the column : Matching - Patching :

1. Nitrogen (i) Supports burning

2. Oxygen (ii) Flursent burning

3. Carbon- di-oxide (iii) Protects us from UV rays

4. Argon (iv) Photosynthesis
5. Ozone (v) Controls burning

2. Identify the diagram of Sedimentation and Decantation :

(i) (ii)
Beater

Water

Sand

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