Class 7 Social Science Geography MCQ Air

Question : Which gases make the bulk of the atmosphere?

(a) Nitrogen
(b) Oxygen
(c) Both a and b
(d) None of these

Question : Which one of the following gases is present in the atmosphere in the highest amount?

(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) Lithium

Question : Which gas is used by the green plants to make their food?

(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) None of these

Question :Which gas released in the atmosphere creates a greenhouse effect trapping the heat?

(a) Carbon dioxide
(b) Oxygen
(c) Nitrogen
(d) All of these

Question : Excess amount of CO₂ is responsible for

(a) global cooling
(b) global warming
(c) both (a) and (b)
(d) none of these

Question : What are the important objects for survival of plants and animals?

(a) Rainfall
(b) Sun light
(c) Oxygen
(d) All of these

Question : Which is the important gas used by human beings for breathing?

(a) Nitrogen
(b) Carbon dioxide
(c) Oxygen
(d) Sodium chloride

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

Question : How ozone layer is important to us?

(a) Protect us from weather changes
(b) Protect us from harmful rays
(c) Protect us from rain
(d) None of these

Question : When the air is heated it becomes

(a) Lighter?
(b) Heavier?
(c) Colder?
(d) None of these

Question : What is the average height of the troposphere?

(a) 3 km
(b) 6 km
(c) 9 km
(d) 13 km

Question : As we go up in troposphere layer of the atmosphere the pressure

(a) increases
(b) decreases
(c) no change
(d) all of these

Question : Which one of the following gases protects us from harmful sun’s rays?

(a) Ozone
(b) Nitrogen
(c) Carbon dioxide
(d) Oxygen

Question : Which of the following are part of weather forecast in the newspapers?

(a) Temperature
(b) Humidity
(c) Time of Sunset
(d) All of These

Question : Which element of weather is measured in degree Celsius?

(a) Temperature
(b) Pressure
(c) Wind
(d) Gravity

Question : The water boils at

(a) 10°C
(b) 50°C
(c) 75°C
(d) 100°C

Question : Where is the air pressure highest?

(a) Moon
(b) Sea Level
(c) Stratosphere
(d) Exosphere

Question : The quantity of nitrogen in atmosphere is ……………. .

Question : Wind vane shows the direction of the ……………. .

Question : In the atmosphere, percentage of oxygen is ……………. %.

Question : When we inhale, we take some amount of ……………. into our lungs and exhale it.

Question : ……………. play an important role for plants to take nitrogen from air.

Question : The increased volume of carbon dioxide is affecting the earth’s ……………. and ……………. .

Question : ……………. layer helps in radio transmission.

Question : Light gases like helium and hydrogen float into the space in ……………. layer.

Question : The most important layer is ……………. .

Question : Standard unit ‘Degrees Celsius’ for measuring temperature invented by ……………. .

Question : Earth is surrounded by a blanket of air called ………….

Question : Green plants produce …………. during photosynthesis.

Question : Increased volume of ………….. is affecting the earth’s weather and climate.

Question : Ionosphere is the part of ……………

Question : Amount of rainfall is measured by ………….

Question : Insolation influences the distribution of …………….

Question : Hot air is dense and heavy and cold air is lighter and expands.

Question : Without Greenhouse effect earth would have been too cold to live.

Question : Ionosphere contains the ozone layer.

Question : Helium and hydrogen float from exosphere into space.

Question : Wind-vane shows the direction of wind.

Question : Air moves from high pressure to low pressure.