MCQ Questions for Class 7 Geography: Ch 4 Air

MCQ Questions for Class 7 Geography: Ch 4 Air

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

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

3. 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
► (d) go up, falls

4. Our earth is surrounded by a huge blanket of
(a) Sand
(b) Air
(c) Plants
(d) Water
► (b) Air

5. ____ is this hour-to-hour, day to day condition of the atmosphere
(a) Wind
(b) Weather
(c) Season
(d) Climate
► (b) Weather

6. Which is the second most plentiful gas in the air
(a) Nitrogen
(b) Argon
(c) Oxygen
(d) Hydrogen
► (c) Oxygen

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

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

9. The ___ winds blow constantly throughout the year in a particular direction.
(a) Directional
(b) Local
(c) Permanent
(d) Seasonal
► (c) Permanent

10. On the Celsius scale the water freezes at ___ and boils at ___
(a) 32ºC, 232ºC
(b) 10ºC, 90ºC
(c) 100ºC, 0ºC
(d) 0ºC, 100ºC
► (d) 0ºC, 100ºC

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

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

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

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

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

16. Which of the following is not the types of rainfall
(a) Orographic rainfall
(b) Cyclonic rainfall
(c) Convectional rainfall
(d) Seasonal rainfall
► (d) Seasonal rainfall

17. Jet planes flying in the sky leave a ____ trail behind them
(a) Black
(b) Blue
(c) White
(d) Grey
► (c) White

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

19.  ___ Pressure is associated with cloudy skies and wet weather and __ pressure is associated with clear and sunny skies.
(a) Low, Normal
(b) Normal, High
(c) Low, High
(d) High, also High
► (c) Low, High

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