Physics · Geography

Atmospheric Physics and Humidity

878 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

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 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.

Multiple choice

Evaporation brings a fall in temperature because

  1. evaporation has a cooling effect

  2. evaporation needs heat

  3. the temperature of the vapours is lower

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

Evaporation is a phase change from liquid to gas, which requires energy in the form of latent heat. This heat is absorbed from the surroundings, causing the temperature of the remaining liquid to drop.

Multiple choice

Environment means

  1. light

  2. water

  3. surroundings

  4. temperature

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

Environment refers to the sum total of all living and non-living elements and their effects that influence human life and the surroundings.

Multiple choice

The ratio of different gases in air is

  1. unknown

  2. fixed

  3. different from place to place

  4. independent of industrialisation of towns
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The composition of air varies based on local conditions such as humidity, pollution, and altitude, making it different from place to place.

Multiple choice

Transpiration would be the lowest when

  1. wind velocity is high

  2. water is sufficient in the soil

  3. atmospheric RH is high

  4. temperature is high
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Transpiration rate is inversely proportional to relative humidity (RH). High humidity reduces the vapor pressure gradient between the leaf interior and the atmosphere, slowing down transpiration.

Multiple choice

The hot air balloon rises because it is

  1. denser

  2. less dense

  3. equally dense

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

A hot air balloon rises because the air inside the balloon is heated, making it less dense than the cooler air outside, creating buoyancy.

Multiple choice

Which of the following statements is/are false?

a. The amount of water vapour present in air is not a fixed quantity, but varies with the change in weather. b. Everything on the surface of the Earth is surrounded by an envelope of air. c. A few of the underwater living organisms can survive without air.

  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
E Correct answer
Explanation

This is the correct option as this statement is false. No underwater living organisms can survive without air.