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 dew point and humidity heat physics

At dew point. RH is _______.

  1. 10%

  2. 30%

  3. 50%

  4. 100%
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The dew point is the temperature at which air is saturated with water vapor, which is the gaseous state of water. The relative humidity is 100 percent when the dew point and the temperature are the same.
Multiple choice dew point and humidity heat physics

The relative humidity on a day when partial pressure of water vapour is $0.012 \times 10^5 Pa$ at $12^oC$ is (Take vapour pressure of water at this temperature as $0.016 \times 10^5$ Pa)

  1. 70%

  2. 40%

  3. 75%

  4. 25%
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Given,

Partial pressure of water vapour $={ 0.125\times 10 }^{ 5 }$ Pa
Vapour pressure of water$={ 0.016\times 10 }^{ 5 }$ Pa
Relative humidity at a given temperature (R) 
$=\dfrac { Partial\quad pressure\quad of\quad water\quad vapour }{ vapour\quad pressure\quad of\quad water } \ =\dfrac { { 0.125\times 10 }^{ 5 } }{ { 0.016\times 10 }^{ 5 } } \ =0.75\ =75%$

Multiple choice dew point and humidity heat physics

When it is raining, the dew point is:

  1. 0$^o$C
  2. 60$^o$C
  3. 100$^o$C

  4. room temperature
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The dew point is the temperature at which the air can exactly hold the amount of moisture present. When raining, at any given temperature, the atmosphere can hold so much water vapour. So the dew point is equal to the room temperature.
Multiple choice

What is the comparison in energy of a hurricane and a one megaton bomb?

  1. 5 bombs:1 hurricane

  2. 2 hurricanes:1000 bombs

  3. 1 hurricane:8000 bombs

  4. 5 hurricanes:41000 bombs
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The total energy released by a mature hurricane is immense, estimated to be equivalent to the explosion of approximately 8,000 one-megaton nuclear bombs. This comparison highlights the massive scale of atmospheric energy in tropical cyclones.

Multiple choice geography weather and climate weather maps winds disaster risk reduction

What do isobars indicate?

  1. The atmospheric pressure in a particular area.

  2. Rainfall in different places.

  3. Wind strengths in several areas.

  4. Places with the same temperature.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Isobars are lines drawn on a weather map connecting points of equal atmospheric pressure.

Multiple choice geography in search of the source of wind global pressure belts pressure belts atmospheric conditions

Which of the following statement is true regarding Subtropical high pressure belt?

  1. The warm air that ascends at the equator cools down and sinks here.
  2. The air from $60^0N-60^0S$ of the equator also descends here to create a high pressure region.

  3. The temperature in this latitude is low, so the expansion and ascent of air is minimal.

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

Subtropical high-pressure belt,

Subtropical high-pressure belt is a high-pressure area that exists along 30° N and 30° S.
The sun is the ultimate source of energy that drives the earth’s weather. Most of the energy reaches the equatorial regions and the least energy reaches the poles, causing the tropics to warm and the poles to cool.
The earth’s atmosphere redistributes this heat imbalance through a complex set of atmospheric circulation patterns. The warm air at the low latitudes rises and moves toward the poles. The rising air, and the subsequent clouds and precipitation, cause the tropics to be very wet. In other words – as we go away from the equator towards the poles, temperature drops.

The warm air at the equatorial region rises up to a height of 10 to 15 km above the surface and moves towards the poles. On its way, it comes down or sinks at the subtropical region. This pattern of atmospheric circulation from the equator to the subtropical region is called Hadley Cell. It is named after George Hadley who was a famous meteorologist and he proposed this mechanism.

As the air moves towards the subtropics i.e. 30° N and 30° S, the air descends over the oceans and creates a high-pressure zone. In the Northern Hemisphere, these high-pressure systems are located over the North Pacific and North Atlantic oceans.

The famous Bermuda Triangle is also located at the North Atlantic Ocean and that’s a high-pressure zone. So, if anyone asks you the secret of the Bermuda triangle, this is the possible logical reason.

The air that moves from the equator towards subtropical region, that air is warm. And then you also have to understand, that there is cold air that is flowing towards the low latitudes from the poles. You see atmospheric circulation redistributes the heat on earth and that means cold and warm air keeps moving from one place to another.

Multiple choice laws of heat transfer heat and thermodynamics physics

We find that the temperature of air decreases as one goes up from the earth's surface because

  1. The atmospheric pressure drops with height

  2. The earth which radiates in the infrared region is the main heat source and temperature drops as we go away from it

  3. The density of air drops with height and the air therefore cannot hold stronger as we go up

  4. Winds are stronger as we go up
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The behaviour of atmosphere is different for visible and infrared radiations. Most of the infrared radiations are not allowed to pass through atmosphere, since it reflects them. The energy from the sun, heats the earth which in turn starts emitting radiations. Since, the earth gets heated to much lower temperature than the temperature of the sun, according to Planck's law, the radiations emitted by the earth are mostly in the infrared region. These radiations from the earth are not allowed to pass through the atmosphere which reflects them back. As a result of it the earth's atmosphere becomes richer in infrared radiations which are sometimes called heat radiations. So, earth radiates in the infrared region, this is the source of heat. As we go up, it decreases.

Multiple choice evs receding water table water resources and conservation water conservation and irrigation water a precious resource

How is water conserved when evaporation is reduced?

  1. Low temperature

  2. Low wind speed

  3. Both (A) and (B)

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

Evaporation is a physical process influenced by environmental conditions. Lower temperatures reduce the kinetic energy of water molecules, and lower wind speeds reduce the rate at which water vapor is carried away from the surface.

Multiple choice biology physical resources air as a natural resource types of chemical reactions chemical reactions

A student finds that as he blows air into a balloon, it becomes bigger. What inference can he make from the above?

  1. Air is a gas

  2. Air has mass

  3. Air is matter

  4. Air occupies space
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When a balloon is filled with air then the air exerts force on the walls of the balloon. Due to this force the balloon material stretches and hence size of balloon increases. The material of the balloon is such that it can stretch a lot.

Multiple choice chemistry the language of chemistry percent composition percentage composition and empirical formula empirical formula, percentage composition and molecular formula

If air is pumped slowly but continuously into a metallic cylinder of strong wall, what would happen to the air inside the cylinder?

  1. Temperature of air would increase

  2. Pressure of air would increase

  3. Pressure of air would decrease

  4. Temperature and pressure of air would increase
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Due to continuous pumping number of moles will increase
We know,
$n\propto P$
$n\propto V$
$n\propto \dfrac{1}{T}$
$\therefore$ Pressure will increase.
Option B.