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 chemistry states of matter: boiling, evaporation and condensation atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

Water vapor is indirectly proportional to ___________.

  1. temperature

  2. surface area

  3. humidity

  4. wind speed
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Humidity is the amount of water vapour present in air. The air around us cannot hold more than a definite amount of water vapour at a given temperature. If the amount of water in air is already high, the rate of evaporation decreases. Hence, it is indirectly proportional to humidity.

Multiple choice chemistry states of matter: boiling, evaporation and condensation atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

Why do clothes dry faster on a windy day?

  1. Evaporation increases with increase in wind speed.

  2. Evaporation increases with increase in humidity.

  3. Evaporation decreases with increase in wind speed.

  4. The above statement is incorrect.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Evaporation increases with increase in wind speed. With the increase in wind speed, the particles of water vapour move away with the wind, decreasing the amount of water vapour in the surrounding. Hence, clothes dry faster on a windy day.

Multiple choice chemistry states of matter: boiling, evaporation and condensation atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

Coolers are more effective in areas with ___________.

  1. low humidity

  2. high humidity

  3. both a and b

  4. none of above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Decrease in humidity increases the rate of evaporation. Coolers work on the concept of evaporation. In high humid areas, rate of evaporation is low and hence, cooler is ineffective. On the other hand, in low humid areas, the rate of evaporation is high which causes cooling and thus, coolers are effective in such areas.

Multiple choice chemistry states of matter: boiling, evaporation and condensation atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

Water stored in earthen pots become cool in summer because:

  1. condensation

  2. evaporation

  3. precipitaion

  4. none
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The water kept in an earthen pot remain cool even in summer because earthen pot has many small holes. Water seeps out through them and evaporates from the surface of the pot. The energy needed for evaporation is taken from the water kept in the earthen pot. As a result, water kept in earthen pot become cool.

Multiple choice chemistry states of matter: boiling, evaporation and condensation atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

Rinku and Pinku had half day schools during summer. They used to go to school by auto. Observed that the auto driver covered the top of the auto by some mats which keeps the auto cool. Which of the following phenomenon is involved here?

  1. Condenzation

  2. Evaporation

  3. Sublimation

  4. Diffusion
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Evaporation is the phenomena involved as it makes the surroundings cooler by removing heat inside the auto. The auto driver keeps the mats which is made of a material which helps in evaporation like cotton.

Multiple choice chemistry states of matter: boiling, evaporation and condensation atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

Which among the following statements is true?

  1. The rate of evaporation in a coastal area is less because of high humidity

  2. The rate of evaporation in a coastal area is more because of presence of water bodies

  3. The rate of evaporation is independent of humidity

  4. The rate of evaporation is directly proportional to humidity
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The rate of evaporation in a coastal area is less because of high humidity because high humidity represents the higher concentration of water vapour in the air due to which temperature of surrounding atmosphere decreases and rate of evaporation also decreases.


Hence, the correct option is $\text{A}$

Multiple choice chemistry states of matter: boiling, evaporation and condensation atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

The rate of evaporation decreases with an increase in _________.

  1. humidity

  2. temperature

  3. wind speed

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

Evaporation is a type of vaporization of liquid that occurs from the surface of liquid, to gaseous phase that is not saturated with the evaporating substance. If the air is saturated with great amount of water causing high humidity, it decreases the rate of evaporation of water.

Multiple choice chemistry states of matter: boiling, evaporation and condensation atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

The rate of evaporation does not depends on:

  1. surface area

  2. wind speed

  3. humidity

  4. type of particles
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The rate of evaporation does not depend on the type of particles because it completely depends upon the surface area of the liquid, if surface area is large evaporation will be maximum. Evaporation also depends upon wind speed, if the wind is flowing at a higher speed, then the rate of evaporation increases. Same will be applied in the case of humidity. Humidity decreases evaporation.

Multiple choice chemistry states of matter: boiling, evaporation and condensation atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

The rate of evaporation increases with:

  1. increase of surface area

  2. increase of temperature

  3. increase in wind speed

  4. all of above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

If the surface area is increased, the rate of evaporation increases. With the increase of temperature, more number of particles get enough kinetic energy to go into the vapour state.  With the increase in wind speed, the particles of water vapour move away with the wind, decreasing the amount of water vapour in the surrounding.

Multiple choice chemistry states of matter: boiling, evaporation and condensation atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

While putting clothes for drying up, why do we spread them out?

  1. Surface area is directly proportional to rate of evaporation.

  2. Increase in surface area decreases rate of evaporation.

  3. Increase in surface area increases rate of evaporation.

  4. Both A and C.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Evaporation is a surface phenomenon. If the surface area is increased, the rate of evaporation increases. While putting clothes for drying up, we spread them out, because, more area is exposed to sun and wind which speeds up the rate of evaporation.

Multiple choice chemistry matter in our surroundings atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

The air pressure in the balloon is due to the air filled in it, striking the walls of the balloon.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The air in the balloon exerts pressure on the walls of the balloon. This is accordance with the kinetic molecular theory of gases which state that the pressure exerted by the gas is equal to the pressure applied by the gas molecule on the walls of container.

Multiple choice chemistry matter in our surroundings atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

If the air pressure of an area decreases suddenly then our blood vessels swells up and sometimes bursts.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

If the air pressure of an area suddenly decreases, then in the human body the blood vessels swell up or sometimes bursts. This activity is commonly seen in mountaineers.

Multiple choice chemistry the particle theory atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

Cycle tube when filled with an air, it swells up because of the pressure exerted by the particles of the air in the tube.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cycle tube when filled with the air it swells up because of the pressure exerted by the particles of the air present in the tube. The particles of air collide with each other and exert pressure on the walls of the tube.

Multiple choice chemistry the particle theory atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

The atmospheric pressure remains unchanged throughout the earth's atmosphere.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The atmospheric pressure changes throughout the atmosphere.
Example: As we go up in the air, the atmospheric decreases as the density of the air decreases. 

Multiple choice chemistry the particle theory atmospheric pressure and boiling point evaporation - factors and effects in daily life changes in physical state - boiling, evaporation and condensation

In human body, the pressure exerted by the cells is ________ the atmospheric pressure.

  1. equal to

  2. more than

  3. slightly greater than

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

In the human body, the pressure exerted by the cells in our body is equal to the atmospheric pressure. Hence we do not get shrunk.