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WorksheetsAir Around Us
Total questions: 10
Worksheet time: 5mins
what is the percentage of oxygen in air?
78%
21%
1%
0%
what is the percentage of nitrogen in air?
21%
1%
2%
78%
What is air
Mixture of gases
Wind
Oxygen
None of the above
How does a phirki ( wind- vane) move?
With the help of oxygen
With the help of nitrogen
With the help of the moving wind
With the help of carbon dioxide
What is a weather cock?
Weather cock is a device which shows the direction of carbon dioxide
Weather cock is a device which shows the direction of carbon monoxide
Weather cock is a device which shows the direction of nitrogen
None of these
Fill in the blanks with the suitable answer. The composition of air is not always exactly the ___________
Different
Same
Varies
All of the above
What is atmosphere?
The envelope of oxygen that surrounds the earth
The envelope of helium that surrounds the earth
The envelope of carbon dioxide that surrounds the earth
The envelope of air that surrounds the earth
what are the gases present in air?
Oxygen
Carbon dioxide
Nitrogen
Water vapour
In which cycle does air plays an important role?
Water Cycle
Bicycle
Car cycle
Scooter cycle
Why nitrogen is needed by plants?
For breathing or respiration
For making proteins
For making food
For burning
