CBSE Class 7 Social Science Geography Air MCQs

Question. Which Type Of Heat Transfer Is Actually Minimized When Using A Thermo Flask?
(a) Conduction
(b) Convection
(c) Radiation
(d) All the above.

Answer : C

Question. Most polluted river in the world is
(a) Yamuna
(b) Cavery
(c) Chenab
(d) Ganga

Answer : D

Question. Which is the most important layer of the atmosphere?
(a) Troposphere
(b) Thermosphere
(c) Mesosphere
(d) None of these

Answer : A

Question. What do you mean by weather?
(a) Incoming solar energy
(b) All condition of the atmosphere
(c) Both a and b
(d) None of these

Answer : B

Question. Pollution of water is responsible for
(a) Oil refineries
(b) Paper factories
(c) Sugar mills
(d) All

Answer : D

Question. Ozone layer is found in:
(a) Troposphere
(b) Mesosphere
(c) Thermosphere
(d) Stratosphere

Answer : D

Question. The standard unit of measuring temperature is
(a) Fahrenheit
(b) Meter
(c) Kelvin
(d) Celsius

Answer : C

Question. In which layers all weather phenomenon occurs?
(a) Tropospherecorrect
(b) Stratosphere
(c) Thermosphere
(d) Mesosphere

Answer : A

Question. A wind is named after the
(a) Area it cover
(b) Place from which it blow
(c) Weight it has
(d) Direction from which it blows

Answer : D

Question. Which of the following gases protects us from harmful sun rays?
(a) Carbon dioxide
(b) Nitrogen
(c) Ozonecorrect
(d) All of these

Answer : C

Question. As we ___ the layers of atmosphere, the pressure ___
(a) go up, rise
(b) go down, falls
(c) go down, does not change
(d) go up, falls

Answer : D

Question. Which winds change their direction in different seasons?
(a) Permanent winds
(b) Seasonal winds
(c) Local winds
(d) None of the above

Answer : B

Question. Which one of the following is a local wind?
(a) Sea breeze
(b) Trade wind
(c) Monsoon wind
(d) None of these

Answer : A

Question. Stratosphere contains a layer of which gas?
(a) Nitrogen gas
(b) Ozone gas
(c) Helium gas
(d) None of these

Answer : B

Question. Carbon dioxide released in the atmosphere creates a
(a) Green house effect
(b) Carbon effect
(c) Earth effect
(d) Dioxide effect

Answer : A

Question. Choose the state which is prone to cyclones that originate in the Bay of Bengal and is located on the eastern seacoast of India.
(a) Kerala
(b) Odisha
(c) Tamil Nadu
(d) Andhra Pradesh

Answer : B

Question. Cooking Utensils Are Made Of Metals Because They Are
(a) Durable
(b) Malleable
(c) Good conductors of heat
(d) Do not break on heating

Answer : C

Question. Green House gas is
(a) Nitrogen
(b) Oxygen
(c) Ethane
(d) Carbon dioxide

Answer : D

Question. Which of these is not a permanent wind
(a) Westerlies
(b) polar winds
(c) Trade winds
(d) Monsoon winds

Answer : D

Question. Atmospheric pressure is measured by:
(a) Barometre
(b) Thermometer
(c) Rain gauge
(d) None of the above

Answer : A

Question. The air pressure is highest at
(a) Plain level
(b) Plateau level
(c) Sea level
(d) Mountain level

Answer : C

Question. The degree of hotness and coldness of the air is known as
(a) Weather
(b) Temperature
(c) Climate
(d) Season

Answer : B

Question. What is released in the air from the burning of fuels?
(a) Carbon di oxide
(b) Helium
(c) Nitrogen
(d) Argon

Answer : A

Question. What is the result when the air is heated?
(a) Heavier
(b) Lighter
(c) Colder
(d) Warmer

Answer : B

Question. When water evaporates from land and different water bodies, it becomes
(a) Ice
(b) Snow
(c) Rain
(d) Water Vapour

Answer : D

Question. Which layer is almost free from clouds?
(a) Troposphere
(b) Mesosphere
(c) Stratosphere
(d) Thermosphere

Answer : C

Question. Green plants use ____ to make their food and release ___
(a) Oxygen, helium
(b) Carbon dioxide, hydrogen
(c) Helium, hydrogen
(d) Carbon dioxide, oxygen

Answer : D

Question. What is responsible for the excess of CO2?
(a) Global warmingcorrect
(b) Global cooling
(c) Both (a) and (b)
(d) None of these

Answer : A

Question. Meteorites burn up in this layer on entering from the space
(a) Thermosphere
(b) Mesosphere
(c) Troposphere
(d) Stratosphere

Answer : B

Question. Cold air is ____ than hot air
(a) Small and heavy
(b) Less denser and light
(c) Denser and heavy
(d) Small and light

Answer : C