Physics · Geography

Atmospheric Physics and Humidity

935 Questions

Study the principles of atmospheric physics and humidity through these practice questions. Key subjects include the rate of evaporation, temperature inversions, and relative humidity measurements. These concepts are vital for geography and physics exams.

Evaporation and condensationRelative humidity conceptsAtmospheric pressure effectsTemperature inversion

Atmospheric Physics and Humidity Questions

Multiple choice

For proper ventilation of a building, windows must be open near the bottom & the top of the walls so as to let pass

  1. in more air

  2. in cool air near the bottom & hot air out near the roof

  3. in hot air near the roof & cool air out near the bottom

  4. out hot air near the roof

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Effective ventilation relies on convection currents. Cool, dense air enters through lower windows, while warm air (which is less dense and rises) exits through openings near the ceiling.

Multiple choice

The amount of actual water vapour of air is known as?

  1. Relative humidity

  2. Absolute humidity

  3. Dew point

  4. None of these.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Absolute humidity is the measure of the actual mass of water vapor present in a specific volume of air. Unlike relative humidity, it does not depend on the air's temperature.

Multiple choice

Assertion (A): The velocity of sound in air increases due to the presence of moisture in it. Reason (R): The presence of moisture in air lowers the density of air.

  1. Both (A) and (R) are true and (R) is the correct explanation of (A).

  2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).

  3. (A) is true, but (R) is false.

  4. (A) is false, but (R) is true.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Both (A) and (R) are true and (R) is the correct explanation of (A).

Multiple choice

Directions: In the question below, the 1st and the last (correctly ordered) sentences are numbered 1 and 6. The rest of the passage is split into four parts and named B, C, D and E. These four parts are not given in the proper order. Choose the correct combination among the four alternatives given.

  1. Aircraft such as balloons, nonrigid airships (blimps), and dirigibles are designed to contain within their structure a sufficient volume. B. When they are filled with a gas lighter than air (heated air, hydrogen, or helium), they displace the surrounding ambient air and float, just as a cork does on the water. C. Dirigibles are no longer in use, but they were lighter-than-air craft with a rigid internal structure, which was usually very large, D. It proved impossible to construct dirigibles of sufficient strength to withstand routine operation under all weather conditions. E. Balloons are not steerable and drift with the wind.
  2. Most of them suffered disaster, either breaking up in a storm or through ignition of the hydrogen.

  1. BECD

  2. CDBE

  3. CEBD

  4. EBCD
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In B ‘they’ refers to ‘Aircraft such as balloons, nonrigid airships (blimps), and dirigibles’ in 1. C introduces Dirigibles and ‘It proved impossible to construct dirigibles’ in D follows it. ‘under all weather conditions’ in D is linked with ‘breaking up in a storm’ in 6. Thus, we get CD in the last and B in the beginning with E following it.

Multiple choice

Consider the following statements:

  1. Normally, atmospheric pressure drops as one goes higher up in the atmosphere because the density of air decreases with altitude.
  2. The temperature decreases with increase in height from the earth’s surface because the atmosphere can be heated upwards only from the earth’s surface.

Which of the above statements is/are true?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Atmospheric pressure decreases with altitude due to lower air density. Temperature decreases with height in the troposphere because the atmosphere is primarily heated by terrestrial radiation from the Earth's surface.

Multiple choice

Which of the following correctly describes STP?

  1. 4oC at 1 Atmosphere

  2. 0oC at 1 Atmosphere

  3. 23oC at 1 Atmosphere

  4. 0oC at 0 Atmosphere
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

STP (Standard Temperature and Pressure) is defined as 0 degrees Celsius and 1 atmosphere of pressure.

Multiple choice

Which of the following correctly describes STP:

  1. 40C at 1 Atmosphere

  2. 00C at 1 Atmosphere

  3. 230C at 1 Atmosphere

  4. 00C at 0 Atmosphere
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Standard Temperature and Pressure (STP) is defined as 0 degrees Celsius and 1 atmosphere of pressure.

Multiple choice

Which of the following statements is/are false?

a. In coastal areas, during night, there is a regular flow of cool air from the sea towards the land. b. Due to the absence of atmosphere on Moon, its temperature rises to about 110oC during the sunlit period and cools to around -190oC during dark period. c. The air moving from high to low pressure follows a spiralling route, outwards from high pressure and inwards towards low pressure.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct option as this statement is false. In coastal areas, during night, there is a regular flow of cool air from the land towards the sea, and not from the sea towards the land.

Multiple choice

With rise in temperature, the speed of sound

  1. increases

  2. drops

  3. remains the same

  4. changes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The speed of sound in a gas increases with temperature because the kinetic energy of the molecules increases, allowing the sound wave to propagate faster.