The atmospheric Layers

The height of atmospheric envelope is about ................. above sea level.

• 1000 km

• 1000 m

• 1000 mb

• 13 km

Atmospheric pressure is the ................ of air column of an atmospheric height on a unit area.

• mass

• volume

• weight

• density

The measuring unit(s) of atmospheric pressure is (are) ..................

• bar

• newton

• millimetre

• both (a) and (c)

A device that is used in measuring the atmospheric pressure is .....................

• barometer

• voltameter

• ammeter

• (b) and (c)

The normal atmospheric pressure equals .................... mb at sea level.

• 76

• 1013.25

• 1,013

• 760

As the density of air increases, the atmospheric pressure .........................

• increases

• decreases

• doesn't change

• (a) or (b)

The density of air increases as we go up.

• True

• False

50% of the mass of the atmospheric envelope is present in the area between the sea level and 3 km elevation.

• True

• False