prep 2 , unit 2 , leseon 1.1

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

• 1000 km

• 1000 m

• 1000 mbar

• 13 km

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

• mass

• volume

• weight

• density

The measuring unit of atmospheric pressure is..........

• Bar

• Newton

• Millimetre

• Millilitre

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

• barometer

• voltmeter

• ammeter

• speedometer

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

• 76

• 1013.25

• 1.013

• 760

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

• increases.

• decreases.

• doesn't change.

• doesn't affect

............ is an instrument used by pilots in aeroplanes to measure their elevation above sea level based on atmospheric pressure.

• Altimeter

• Thermometer

• Aneroid

• Digital balance

The amount of change in the temperature at any height in troposphere is given by............

• height in metres x 6.5

• height in km + 6.5

• height in km x 6.5

• height in km ÷ 6.5

Temperature decreases by....... C °at 2 km above sea level

• 6.5

• 13

• 5.6

• 9.75

All the atmospheric phenomena on the Earth like rains, winds and clouds take place in ........ layer.

• mesosphere

• stratosphere

• thermosphere

• troposphere