When is the air clean?
Morning
Afternoon
Evening
Night
Air is a mixture of many:
Gases
Germs
Dust
Vapour
Which is the use of wind?
To create electricity
To give fresh air
To move things from one place to another
To destroy pests
How many breaths do an adult take in a day?
10000
20000
30000
40000
What percentage of air consist of nitrogen?
78%
88%
98%
68%
The mixture of gases that makes up the Earth's atmosphere is called:
Water vapour
Air
Nitrogen
Hydrogen
What is formed when water vapor rises up in the sky?
Rain
Clouds
Breeze
Storm
Which breeze blows from the land towards the sea at night?
Land breeze
Sea breeze
Ocean breeze
Air breeze
Which statement is true?
All storms are dangerous.
Only few storms dangerous.
Not all storms are dangerous.
Storms are not at all dangerous.
What causes storms?
Slow wind with rains
Strong winds with thunder and rains
Dark clouds and rains
Heavy rains
