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 business organisation and correspondence industrial pollution and degradation of environment sources of pollution environmental conservation environment and conservation

During inversion, visibility is reduced and pollutant concentration is

  1. Minimized

  2. Maximized

  3. Reduced

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

Temperature inversion traps pollutants near the ground by preventing vertical mixing, which leads to a buildup and maximization of pollutant concentrations in the lower atmosphere.

Multiple choice evs forests and life forest - the dwelling place of animals forest and its importance introduction to forests conservation of forest and wildlife wildlife

If forest disappear

  1. The amount of ${ CO } _{ 2 }$ in air decrease
  2. The amount of ${ O } _{ 2 }$ in air will increases
  3. The amount of ${ CO } _{ 2 }$ in air increases

  4. The Amount of nitrogen in air will increase
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

If forest disappears or the deforestation continues to exist then the amount of carbon dioxide in the atmosphere will increase. This is because the Green plants capable of fixing atmospheric carbon dioxide into Organic material such as glucose by the action of photosynthesis are no longer available. 

Thus, increasing the carbon dioxide level in the air. 
So, the correct option is 'The amount of carbon dioxide in the air increases'.

Multiple choice evs weather, climate and adaptations of animals to climate weather, climate and adaptation of animals to different climates climate and weather atmosphere and its components

The percentage of water vapor present in the air compared to that required for saturation is the:

  1. Mixing ratio

  2. Absolute humidity

  3. Dew point

  4. Relative humidity
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Relative humidity is defined as the ratio of the actual amount of water vapor in the air to the maximum amount the air could hold at that temperature, expressed as a percentage.

Multiple choice evs weather, climate and adaptations of animals to climate weather, climate and adaptation of animals to different climates climate and weather atmosphere and its components

If very cold air is brought indoors and warmed with no change in its moisture content, the saturation vapor pressure of this air will __________ and the relative humidity of this air will ___________ .

  1. Increase, increase

  2. Decrease, decrease

  3. Increase, decrease

  4. Decrease, increase
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Warming air increases its capacity to hold water vapor (saturation vapor pressure increases). If the actual moisture content remains constant, the ratio of actual to saturation vapor pressure (relative humidity) decreases.

Multiple choice evs weather, climate and adaptations of animals to climate weather, climate and adaptation of animals to different climates climate and weather atmosphere and its components

At what time of day is the relative humidity normally at a minimum?

  1. When the air temperature is highest

  2. Just before sunrise

  3. About midnight

  4. When the air temperature is lowest
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Relative humidity is inversely related to temperature. When the temperature is at its daily maximum, the air's capacity to hold water is highest, resulting in the lowest relative humidity.

Multiple choice evs - i what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure
As we go up the layer of the atmosphere, the pressure ___________.

  1. increases

  2. decreases

  3. remains same

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

Air pressure always decreases with the increasing altitude. The decrease is caused by the compressional effect of the air above and its density. The decrease of temperature with increasing altitude in the atmosphere is called the vertical temperature gradient.

Multiple choice evs - i what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

As we go up the layers of the atmosphere, the pressure ________.

  1. Increases

  2. Decreases

  3. Remains the same

  4. All of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The weight of the atmosphere acts as a force upon the underlying surface of the Earth. The amount of force exerted over an area of surface is called atmospheric pressure or air pressure. In the atmosphere, the air pressure at any point is caused by the weight per area of the air above that point. As we go up the layers of the atmosphere, fewer air molecules are above us. So, there will be less weight of air above us. Hence, atmospheric pressure always decreases as we move upward in the atmosphere.
Multiple choice geography what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

Which of the following statements is true:

A.The troposphere is thinner at the poles 

B.The troposphere is thicker at the poles 

  1. Only A

  2. Only B

  3. Both A and B

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

Among the given options only A is true because troposphere is thinner at the poles. The height of the troposphere varies from place to place and from season to season. The height of the troposphere at the pole is about 8 Km while at the equator it is about 16 Km.

Multiple choice physics pressure in liquids and gases common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

The moisture present in mercury ______ the barometric height of simple barometer

  1. increases

  2. decreases

  3. doesn't change

  4. can't say
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The instrument that measures air pressure is a barometer.  There are two types of barometers, mercury and aneroid. In 1643, Toricelli invented the mercury barometer when he inserted a glass tube in a dish of mercury and observed the day-to-day variations in the height of the mercury column. When the atmospheric pressure was high, the greatest pressure was exerted on the mercury in the dish, causing the mercury in the glass tube to rise.  When the pressure was low, the mercury in the glass tube fell. The contemporary aneroid barometer employs a vacuum chamber sensitive to external pressure changes.  Contraction and expansion of the vacuum chamber, linked mechanically to an indicator needle, move the needle clockwise when the pressure rises and counter clockwise when the pressure falls.

Multiple choice physics pressure in liquids and gases common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure
Air creates as much pressure as created by ....... $cm$ of vertical height of mercury column in a simple barometer.
  1. $22$
  2. $36$
  3. $76$
  4. $260$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The height to which mercury rises in simple barometer is $76cm$.

This is the reason that  atmospheric pressure is often expressed as $76cm$ of Hg at sea level.

Multiple choice physics pressure in liquids and gases common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

They does the mercury column in the barometer fall rapidly before a severe storm?

  1. It is due to the fall in atmospheric pressure

  2. It is due to the rise in atmospheric pressure

  3. It is due to decrease in humidity in air

  4. It is due to the severe heat energy from the sun
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The mercury column in the barometer fall rapidly before a severe storm, It is due to Fall in the atmospheric pressure. In general, a falling barometer indicates the approach of a storm. If the mercury is over 30.20 inches but falling quickly, warmer, cloudier weather is coming 

Hence option A is a right answer

Multiple choice physics pressure in liquids and gases common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

The vertical height of the mercury column in a barometer remains unaffected even if the tube is tilted.

  1. True

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

Tilting of tube does not brings any change in height  as  pressure depends on height and as it is not changing. 

so given statement is true
so option (A) is correct .

Multiple choice physics pressure in liquids and gases common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

When a barometer reading suddenly recedes it indicates that climate:

  1. will be very warm

  2. will be extremely stormy

  3. will remain cold
  4. incessant rain for at least $48$ hours.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In summer, when the barometer falls suddenly, a thunderstorm can be expected, and if it does not rise again upon its cessation, the weather will probably continue unsettled for several days. In summer, when a thunderstorm happens, there is little or no depression of the barometer.

Multiple choice physics pressure in liquids and gases common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

State whether true or false:

The air pressure can support $13.10 m$ vertical column of mercury. 

  1. True

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

$P = \rho gh$, where
$P = $air pressure $= 101325Pa$
$\rho = $density of mercury$ = 13594kg/{m}^{3}$
$\implies h = 0.76m$

It can support 0.76 m vertical column of mercury.
Hence the given statement is false.

Multiple choice physics pressure in liquids and gases common consequences of the atmospheric pressure atmospheric pressure and its consequences important points about atmospheric pressure

Water is not used as a barometric liquid because 

  1. it is difficult to have a barometer tube 11 m long.

  2. water vaporises under vacuum conditions.

  3. water sticks to the side of glass tube.

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

Mercury is more dense. Its relative density is $13.534$ times that of water. So, to measure the atmospheric pressure, which is $760 mm$ of mercury you need a barometer ,with mercury, of length slightly more than $0.76 m$, say one meter to cover the special cases of some higher  pressure. If you use water, you have to have the length of barometer of  length (or height)  $13.534$ times the length of mercury barometer, which  may be more than $11 m$ in length. 


Further mercury, being a metal has the shining quality which highlight its reading clear. Also mercury, having comparatively lower specific heat and good conductor of heat, could come to the same temperature of the atmosphere more quickly.