Air Around Us

Moving air is called ________

• wind

• fog

• dew

The envelope of air that surrounds the earth is called ________

• atmosphere

• hydrosphere

• lithosphere

Mountaineers carry _________ cylinders with them, while climbing mountains.

• nitrogen

• carbon dioxide

• oxygen

Air is a mixture of many _________

• solids

• liquids

• gases

___________ gas is necessary for burning

• oxygen

• nitrogen

• carbon dioxide

__________ gas occupies the major part of composition of air.

• nitrogen

• oxygen

• carbon dioxide

The burning of fuel produces ______

• dew

• wind

• smoke

As we move higher in the atmosphere, the air gets _______

• increases

• more

• rarer