What percentage of air consist of nitrogen?
78%
88%
98%
68%
How is wind produced?
When Sun rays are blocked by the clouds
When cool air rises up
When water vapor in the air rises up
When hot air rises up
When is the air clean?
Morning
Afternoon
Evening
Night
Air supplies us with:
Hydrogen
Carbon
Oxygen
Nitrogen
What are the effects of air pollution?
asthma
diarrhea
eczema
hyper tension
Pollution is classified into:
One
Two
Three
Four
How can avoid air pollution?
By afforestation
By deforestation
By recycle and reuse as mush waste as we can
by avoiding throwing trash such as, empty cans, bottle or wrappers onto the ground.
A very strong wind is called a:
Storm
Wind
Breeze
Hurricane
What causes storms?
Slow wind with rains
Strong winds with thunder and rains
Dark clouds and rains
Heavy rains
