WBBSE Class 7 Geography Chapter 3 Air Pressure Multiple Choice Questions

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WBBSE Class 7 Geography Chapter 3 Air Pressure Multiple Choice Questions

Question 1. The blanket of air surrounding the Earth is called-

  1. Atmosphere
  2. Hydrosphere
  3. Lithosphere

Answer: 1. Atmosphere

Question 2. The force exerted by the air per unit area on the Earth’s surface is called atmospheric-

  1. Pressure
  2. Humidity
  3. Density

Answer: 1. Pressure

Read And Learn Also WBBSE Class 7 Geography Multiple Choice Questions 

Question 3. Normal atmospheric pressure at sea level is approximate-

  1. 1000 MB
  2. 1020.5 MB
  3. 1013.25 MB

Answer: 3. 1013.25 MB

WBBSE Class 7 Geography Chapter 3 Air Pressure Multiple Choice Questions

Question 4. Air exerts pressure on the Earth’s surface due to the-

  1. Transparency of air
  2. Gravitational attraction of the earth
  3. Gaseous nature of air

Answer: 2. Gravitational attraction of the earth

Question 5. Atmospheric pressure falls by for every 110 metres of ascent.

  1. 1 cm of mercury
  2. 1 mm of mercury
  3. 1 MB.

Answer: 1. 1 cm of mercury

Question 6. The average air pressure is-

  1. 1 kg per square centimetre
  2. 1 tonne per square centimetre
  3. 1 gram per square centimetre

Answer: 1. 1 kg per square centimetre

Question 7. Normal atmospheric pressure over the Earth varies between-

  1. 980 mb to 1050 mb
  2. 580 mb to 650 mb
  3. 180 mb to 270 mb

Answer: 1. 980 Mb to 1050 Mb

Question 8. Atmospheric pressure is measured by an instrument called-

  1. Thermometer
  2. Barometer
  3. Hygrometer

Answer: 2. Barometer

Question 9. The barometer was invented by-

  1. Torricelli
  2. Galileo
  3. Newton

Answer: 1. Torricelli

Question 10. Is used in barometers.

  1. Oil
  2. Water
  3. Mercury

Answer: 3. Mercury

Question 11. Gradual fall in the mercury column in a barometer indicates the probable occurrence of-

  1. Rain
  2. Clear weather
  3. Blue sky

Answer: 1. Rain

Question 12. The principal cause of variation in the atmospheric pressure is-

  1. Air flow
  2. Temperature
  3. Latitude

Answer: 2. Temperature

Question 13. We do not feel the atmospheric pressure, because-

  1. It is balanced by the fluid pressure inside our body
  2. It is less
  3. Our body can tolerate the pressure

Answer: 1. It is balanced by the fluid pressure inside our body

Question 14. Atmospheric pressure on a high mountain range is-

  1. More than that at sea level
  2. Less than that at sea level
  3. Same as that at sea level

Answer: 2. Less than that at sea level

Question 15. At the top of Mount Everest, the atmospheric pressure is-

  1. 330 millibar
  2. 30 millibar
  3. 1000 millibar

Answer: 1. 330 millibar

Question 16. With an increase in altitude the atmospheric pressure-

  1. Increases
  2. Remains the same
  3. Decreases

Answer: 3. Decreases

Question 17. In hilly regions the boiling point of liquids-

  1. Increases
  2. Remains the same
  3. Decreases

Answer: 3. Decreases

Question 18. With an increase in atmospheric pressure, the boiling point of liquids-

  1. Increases
  2. Decreases
  3. Remains The Same

Answer: 1. Increases

Question 19. Water vapour is than air.

  1. Lighter
  2. Heavier
  3. At times lighter or heavier

Answer: 1. Lighter

Question 20. The amount of water vapour present in the air is-

  1. Variable
  2. Same
  3. Increases

Answer: 1. Variable

Question 21. In the monsoon season, atmospheric pressure remains-

  1. High
  2. Low
  3. Very high

Answer: 2. Low

Question 22. The pressure of saturated air is-

  1. Low
  2. High
  3. Moderate

Answer: 1. Low

Question 23. With an increase in pressure, the volume of air-

  1. Increases
  2. Remains The Same
  3. Decreases

Answer: 3. Decreases

Question 24. When air is heated up, the molecules contained within it move-

  1. Faster
  2. At the same speed
  3. Slower

Answer: 1. Faster

Question 25. When hot air cools down, its density-

  1. Increases
  2. Remains the same
  3. Decreases

Answer: 1. Increases

Question 26. Permanent low-pressure belts prevail over the-

  1. Equatorial Region
  2. Subtropical Region
  3. Polar Region

Answer: 1. Equatorial Region

Question 27. The number of permanent pressure belts on the Earth’s surface are-

  1. 5
  2. 6
  3. 7

Answer: 3. 7

Question 28. The sub-polar low-pressure belt near the Antarctic Circle is observed around the-

  1. 66½° north latitude
  2. 66½° south latitude
  3. 23½° south latitude

Answer: 2. 66½° south latitude

Question 29. Lies between 60°-90° N and S Latitudes.

  1. High-pressure belt
  2. Calm pressure belt
  3. Low-pressure belt

Answer: 3. Low-pressure belt

Question 30. Forms due to extreme cold conditions in both polar regions.

  1. High-pressure belt
  2. Low-pressure belt
  3. Calm belt

Answer: 1. High-pressure belt

Question 31. In the equatorial region, the atmospheric pressure is-

  1. High
  2. Low
  3. Moderate

Answer: 2. Low

Question 32. The pressure zone prevails over the North Pole is-

  1. High
  2. Low
  3. Moderate

Answer: 1. High

Question 33. Low-pressure belt lies between-

  1. 5°N-5°S latitude
  2. 20°-30°N and S latitude
  3. 30°-40°N and S latitude

Answer: 1. 5°N-5°S latitude

Question 34. Sub-tropical high-pressure belts exist between-

  1. 25°-35°N and S latitudes
  2. 5°-10°N and S latitudes
  3. 30°-60°N and S latitudes

Answer: 1. 25°-35°N and S latitudes

Question 35. Polar high-pressure belts form between-

  1. 90°N and S latitudes
  2. 25°-35°N and S latitudes
  3. 30°-60°N and S latitudes

Answer: 1. 90°N and S latitudes

Question 36. The number of pressure cells observed in the northern hemisphere is that in the southern hemisphere.

  1. More than
  2. Same as
  3. Less than

Answer: 1. More than

Question 37. The size of pressure cells is elongated in the-

  1. Southern hemisphere
  2. Eastern hemisphere
  3. Northern hemisphere

Answer: 1. Southern hemisphere

Question 38. The line joining places of equal pressure on the Earth’s surface is called-

  1. Contour
  2. Isotherm
  3. Isobar

Answer: 3. Isobar

Question 39. The isobars stretch along-

  1. East-west direction
  2. North-south direction
  3. North-west direction

Answer: 1. East-west direction

Question 40. Closely-spaced isobars indicate the presence of-

  1. High-Velocity Winds
  2. Low-Velocity Winds
  3. Feeble Winds

Answer: 1. High-Velocity Winds

Question 41. Winds blowing from high-pressure zones

  1. Cold in nature
  2. Hot in nature
  3. Light in nature

Answer: 1. Cold in nature

Question 42. The tropical cyclones which form over the China Sea are called-

  1. Typhoon
  2. Tornado
  3. Willy Willy

Answer: 1. Typhoon

Question 43. The tropical cyclones which form over north-west Australia are called-

  1. Willy Willy
  2. Tornado
  3. Hurricane

Answer: 1. Willy Willy

Question 44. The whirlwinds that form on the Indian Ocean are known as-

  1. Cyclones
  2. Hurricanes
  3. Typhoons

Answer: 1. Cyclones

Question 45. The average air temperature at the top of Mount Everest is-

  1. -20°C to -35°C
  2. -200°C to -350°C
  3. 20°C to 35°C

Answer: 1. -20°C to -35°C

Question 46. In Puri, the atmospheric pressure is approximate-

  1. 1000 millibar
  2. 330 millibar
  3. 30 millibar

Answer: 1. 1000 millibar

Question 47. The speed of air is measured in units of-

  1. Millibar
  2. Kilogram
  3. Knot

Answer: 3. Knot

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