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

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

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.

Multiple choice

Which of the following statements is/are false?

a. Air always contains suspended particles that may be dust, smoke or any other material. b. The presence of dust particles in air never varies from place to place and time to time. c. Air always contains some amount of water vapours.

  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
C Correct answer
Explanation

This is the correct option as this statement is false. The presence of dust particles in air varies from place to place and time to time.

Multiple choice

Which of the following is the reason due to which the visibility increases after rains?

  1. It is because more sunlight reaches the Earth as the atmosphere clears up.

  2. It is because rain washes off dust particles and air becomes clean.

  3. It is because the moisture level of air increases.

  4. It is because the rains decrease the humidity, making the air clean.

  5. It is because the decrease in temperature after rains aids visibility.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct option. The rains wash off dust particles and air becomes clean. This increases the visibility.

Multiple choice

Which of the following statements is/are false?

a. There is a drop in temperature and pressure of the air with the increase in height. b. The air becomes thinner and thinner as one go high up in the atmosphere. c. The gases in the atmosphere are stationary and help in the formation of weather.

  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. The gases in the atmosphere are not stationary, but move up and down and help in the formation of weather.

Multiple choice

Which of the following is/are the factors that do not increase the rate of evaporation?

a. Lower temperature of the air b. Movement of air c. Larger area of the exposed surface

  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. Lower temperature of the air will not increase the rate of evaporation. But, higher temperature will increase the rate of evaporation. During the daytime, the sun shines on water bodies. It increases the temperature and increases the rate of evaporation.

Multiple choice

Through which of the following processes, water vapours are added into the air?

a. Evaporation b. Transpiration c. Condensation d. Precipitation

  1. Only a and c

  2. Only b and d

  3. Only a and b

  4. Only b and c

  5. Only c and d
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option. Water vapours are added into the air through evaporation by the heat of the sun, from various water bodies and through transpiration by all kinds of plants that grow on the surface of land.

Multiple choice

Which of the following statements is/are false?

a. The cool air can hold a large amount of water vapours. b. The lower part of the earth’s atmosphere is full of water vapours. c. Clouds are formed when some water vapours change into liquid state and form tiny droplets of water.

  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. The warm air can hold a large amount of water vapours.

Multiple choice

Rate of transpiration is enhanced

  1. in winter

  2. in rainy season

  3. when temperature is high

  4. when there is no light
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Transpiration is the evaporation of water from plants. Higher temperatures increase the rate of evaporation, thereby enhancing the rate of transpiration.