AIR

Air is always present around us ?

• TRUE

• FALSE

• MAY BE

Air is _________ than water.

• Heavier

• Lighter

There is a covering of air all around the _____________.

• India

• Earth

Air is a _________ of several of gases.

• Solution

• Mixture

The large part of the air is covered by ___________.

• Nitrogen

• Oxygen

_________ is present in small quantities in air.

• Nitrogen

• Carbon dioxide

_________ from air is used for breathing and burning.

• Carbon dioxide

• Oxygen

Plants use ______________ gas while preparing their food.

• Nitrogen

• Carbon dioxide

Air is mostly made up of what two gases?

• oxygen and nitrogen
• oxygen and hydrogen
• hydrogen and helium
• nitrogen and hydrogen

How much oxygen is in the air? (%)

• 25%
• 21%
• 68%
• 50%