Around 50 percent of the oxygen we breathe comes from phytoplankton,” Phytoplankton are tiny plants that live on the surface of oceans and lakes.

#air #atmosphere #properties of air #composition of air

Created on By Kriti

Air, Its composition and properties

Earth's atmosphere is composed of air. Air is a mixture of gases, 78% nitrogen and 21% oxygen with traces of water vapor, carbon dioxide, argon, and various other components.

1 / 25

Density of air ________ as the altitude _________ .

2 / 25

Which gas is filled in tubeless tyres?

3 / 25

You may notice that when you open a new bag of potato chips, half of the bag is filled with "air". Which air is filled in packets of chips.

4 / 25

Strong wind is called ________ .

5 / 25

Which gas makes up approximately 21% of the atmosphere?

6 / 25

A gentle wind is called ____.

7 / 25

Wind is made when the sun cools the earth's surface.

8 / 25

A gas balloon is a balloon that rises and floats in the air because it is filled with a gas lighter than air. Which gas is filled in Gas balloons

9 / 25

which gas filled in aeroplane tyre?

10 / 25

Air cannot be seen or touched. It can be felt when wind blows.

11 / 25

The green plants use ____ gas for preparing food.

12 / 25

Air forms a layer around the earth. This layer is called the_________.

13 / 25

Air is made of tiny molecules which freely moves in all directions.

14 / 25

Hot air rises because gases expand as they heat up.

15 / 25

The movement of air due to a change in temperature is called?

16 / 25

Wind is effected by _______.

17 / 25

Which gas is not used to fill in electric bulbs?

18 / 25

When warm air rises, it is replaced by the cooler air.

19 / 25

Air in the atmosphere is not capable of exerting pressure.

20 / 25

Which gas is present in the atmosphere in the greatest amount?

21 / 25

Air has mass and occupies space.

22 / 25

Gases move from high-pressure areas to low-pressure areas. And the bigger the difference between the pressures, the faster the air will move from the high to the low pressure.That movement of air is called wind.

23 / 25

Which gas is used in filling tyres of racing vehicles?

24 / 25

Which gas makes up approximately 1% of the atmosphere?

25 / 25

Hot air is less dense than cold air, which is why hot air ____ and cold air______

Your score is

The average score is 63%



 The properties of air are:
1.  Air takes up space.
2.  Air has mass.
3.  Air is affected by heat.
4.  Air exerts pressure.
5.  Air can be compressed
6.  Air is affected by altitude.

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