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prep 2 , unit 2

Total questions: 30

Worksheet time: 15mins

Name
Class
Date
1.

The height of atmospheric envelope is about above sea level.

a)

1000 km

b)

1000 m

c)

1000 mbar

d)

13 km

2.

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

a)

mass

b)

volume

c)

weight

d)

density

3.

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

a)

bar.

b)

Newton.

c)

millimetre.

d)

millilitre.

4.

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

a)

barometer.

b)

voltmeter.

c)

ammeter.

d)

speedometer.

5.

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

a)

76

b)

1013.25

c)

1.013

d)

760

6.

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

a)

increases.

b)

decreases.

c)

doesn't change.

d)

doesn't affect.

7.

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

a)

Altimeter

b)

Thermometer

c)

Aneroid

d)

Digital balance

8.

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

a)

height in metres x 6.5

b)

height in km ÷ 6.5

c)

height in km + 6.5

d)

height in km × 6.5

9.

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

a)

65 deg * C

b)

13 deg * C

c)

5.6 deg * C

d)

9.75 deg * C

10.

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

a)

mesosphere

b)

stratosphere

c)

thermosphere

d)

troposphere

11.

Water vapour in troposphere..... the temperature on the Earth.

a)

organizes

b)

decreases

c)

increases

d)

has no effect on

12.

The....... layer is much vacuumed layer.

a)

troposphere

b)

stratosphere

c)

mesosphere

d)

thermosphere

13.

Meteors are formed in........ layer.

a)

ionosphere

b)

stratosphere

c)

mesosphere

d)

exosphere

14.

The hottest atmospheric layer in atmospheric envelope is.......

a)

troposphere.

b)

stratosphere.

c)

thermosphere.

d)

mesosphere.

15.

Ionosphere layer is surrounded by two...... belts.

a)

electric

b)

ionic

c)

magnetic

d)

thermal

16.

Ionosphere layer is located in the upper part of....... layer.

a)

stratosphere

b)

troposphere

c)

mesosphere

d)

thermosphere

17.

The charged cosmic radiations are dispersed in the........layer.

a)

troposphere

b)

stratosphere

c)

mesosphere

d)

ionosphere

18.

Ozone layer is located in ... layer.

a)

troposphere

b)

stratosphere

c)

mesosphere

d)

thermosphere

19.

Ozone gas molecule consists of..........

a)

four oxygen atoms.

b)

two oxygen atoms.

c)

three oxygen atoms.

d)

one oxygen atom.

20.

Oxygen molecule splits into two free atoms in the stratosphere layer under the effect of.......

a)

heat,

b)

infrared radiations.

c)

ultraviolet radiations.

d)

cooling down.

21.

Scientist ........proposed that the thickness of ozone layer is about 3 mm under the standard temperature and pressure.

a)

Newton

b)

Edeson

c)

Dobson

d)

Watson

22.

Ozone degree is measured in a unit called

a)

km.

b)

Dobson.

c)

mm³.

d)

nm.

23.

Ozone hole appears over the......

a)

equator.

b)

north pole.

c)

south pole.

d)

middle east.

24.

Ozone hole increases in......... each year.

a)

December

b)

September

c)

January

d)

October

25.

.......compounds are known commercially as freon.

a)

Halons

b)

Nitrogen oxides

c)

Hydrocarbons

d)

Chlorofluorocarbo

26.

All the following are from the uses of chlorofluorocarbon compounds except.........

a)

solvent substance.

b)

flating substance.

c)

propellant substance.

d)

heating substance.

27.

All the following are negative effects of global warming except.......

a)

melting the ice at the north pole.

b)

severe climatic changes.

c)

the lack of ozone gas in the atmospheric envelope.

d)

melting the ice at the south pole.

28.

............is/are among the reasons for increasing CO2 gas percentage.

a)

Watering the land

b)

Cutting trees only

c)

Forests fires only

d)

Cutting trees and forests fires.

29.

..............radiation is characterized by thermal effect.

a)

Infrared

b)

Ultraviolet

c)

Visible light

d)

X-ray

30.

..........is from the animals that will extinct due to the melting of ice in the north and south pole (as a result of global warming).

a)

Polar bear

b)

Blue whale

c)

Mammoth

d)

Squirrel

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