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: (i) Compressed air coming out from a punctured ball becomes hotter. (ii) A sudden fall in the reading of a barometer indicates the sign of coming storm.

Which of the given statements is/are correct?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

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

Statement 1 is incorrect. Compressed air coming out from a punctured ball becomes cooler as every expanding gas produces cooling effect. Statement 2 is correct. Barometer is a scientific instrument used to measure the atmospheric pressure. From a sudden fall in mercury of a barometer, a thunderstorm may be expected.

Multiple choice

Consider the following statements:

  1. Mountain roads rarely go straight up the slope but wind up gradually.
  2. An inflated balloon will rise to a definite height in atmosphere and then it will come to rest.

  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

Solution 1 is correct. When a road goes straight up, the slope is large and hence the frictional force is small. Now due to insufficient friction, the wheels slip on the road. Moreover for a large slope, more power will have to be used. Solution 2 is also correct. An inflated balloon will rise to a definite height in atmosphere and then it will come to rest. It will come at rest when the atmospheric pressure is equal to the air pressure inside the balloon.

Multiple choice

Why is air considerd a transparent object?

  1. As it possesses a mixture of gases

  2. As light passes very easily through it

  3. As it is lighter than water

  4. As it contains microorganisms
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Transparent objects are the ones through which light can easily pass, e.g. water, air, etc. 

Multiple choice

Which of the following activities shows that air exerts pressure?

  1. Opening a soft drink bottle

  2. Burning of a candle

  3. Smoking of a cigarette

  4. Combustion of fuel
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Burning of a candle, fuel or a cigarette does not show that air exerts pressure. On the other hand, pressure exerted by air can be felt in riding a bicycle, flying a kite, rowing a boat and opening a soft drink bottle. 

Multiple choice

Increased wind speed is accompanied by

  1. reduced air pressure

  2. increased air pressure

  3. expansion of air

  4. contraction of air
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Wind always moves from a region of higher pressure to lower pressure. When it leaves a place of high pressure, a low pressure is created in that region. Therefore, an increased wind speed is always accompanied by reduced air pressure.

Multiple choice

Which of the following options is correct about the direction of flow of air?

  1. Hot air flows from a colder region to a hottter region

  2. Air flows from a region of higher pressure to lower pressure

  3. Air flows from a region of lower pressure to higher pressure

  4. Air flows from a hotter region to a colder region
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gases always move or flow from a region of higher pressure to lower pressure. As air is also a mixture of gases, it also moves in the same direction.

Multiple choice

Why does a bicycle tube have more punctures in summer than in winter?

  1. Because high temperature expands air

  2. Because high temperature contracts air

  3. Because a tube contracts in summers

  4. Because a tube expands in winters
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Air expands on heating. The tube of a bicycle in summers expands due to the expansion of air inside it. This happens due to an increase in temperature in summers and hence, causes more punctures in a bicycle tube.

Multiple choice

Which of the following statements is true?

  1. Temperature decreases with increase in altitude

  2. Temperature increases with increase in altitude

  3. Temperature remains the same at every altitude

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

Correct Answer: Temperature decreases with increase in altitude.

Multiple choice

A desert cooler cools better on a hot and dry day because the higher temperature on a hot day

  1. increases the diffusion of water

  2. decreases the humidity of air

  3. increases the humidity of air

  4. increases the rate of evaporation of water

  5. decreases the rate of evaporation of water
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option. A desert cooler cools better on a hot and dry day because the higher temperature on a hot day increases the rate of evaporation of water.

Multiple choice

Which of the following statements is/are false?

a. Water vapour comes into the air from the evaporation of water present in ponds, lakes, rivers and oceans. b. All the water on the earth does not get evaporated due to the high value of latent heat of vaporisation of water. c. On increasing the pressure on solid carbon dioxide, it gets converted directly into carbon dioxide gas.

  1. Only a

  2. Both a and b

  3. Only b

  4. Both 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. On decreasing the pressure on solid carbon dioxide, it gets converted directly into carbon dioxide gas.