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 physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth

An experiment is conducted to understand air pressure. Two identical balloons are filled with little water and blown. Then they are tied to a string some distance apart. What happens when air is blown in between them ?

  1. They move closer to each other.

  2. They move further apart.

  3. One moves up and other moves down

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

According to Bernoulli's principle, an increase in the speed of a fluid occurs simultaneously with a decrease in static pressure. Blowing air between the balloons creates a low-pressure region, causing the higher atmospheric pressure on the outside to push the balloons toward each other.

Multiple choice physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

Arrange the following steps in the proper order to explain how a sea breeze occurs, near coastal regions.
(a) The temperature of land rises rapidly as compared to sea, because the specific heat capacity of land is five times less than that of water.
(b) Due to the low pressure over the land mass, the cool air over the sea starts blowing towards the land.
(c) The sun shines equally on the land mass and sea, giving equal amount of heat energy to both.
(d) The air above the land becomes hot and light, rises up and hence creates the low pressure over the land.

  1. a d c b

  2. c d a b

  3. c a b d

  4. c a d b
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Near the coastal regions, when (c) the sun shines equally on the land mass as well as the sea giving an equal amount of heat energy.But (a) the temperature of land rises rapidly as compared to the sea water, as specific heat capacity of water is five times greater than that of land. So, water requires more heat energy to raises its temperature by $1^{\circ}C$. Then (d) the air above the land mass becomes hotter and lighter and hence rises up, which creates a low pressure over the land. (b) Due to the low pressure over the land mass, the cool air over the sea starts blowing towards the land, by this producing sea breeze.

Multiple choice physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

State whether true or false.
The land and sea breezes are based on the fact that the specific heat of vaporisation of steam is very high.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The statement is true.
The specific heat capacity of water is much higher than that of sand. Air above land becomes more warmer than water during day. So cold air above water or sea blows to land known as sea breeze and vice versa for land breeze.
Multiple choice physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth

A small weight put on the pressure cooker increased the pressure of steam because.

  1. Density of metal is very high

  2. Area of contact is very small

  3. It is air tight

  4. Pressure builds up irrespective of the weight placed
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pressure is defined as force divided by area. By placing a weight on the pressure cooker's vent, the force is increased, and because the area of the vent is small, it significantly increases the pressure required for steam to escape.

Multiple choice evs water in our life where do we get water from? why conserve water uses of water

If water vapor comprises 3.5 percent of an air parcel whose total pressure is 1,000 mb, the water vapor pressure would be:

  1. 1,035 mb

  2. 35 mb

  3. 350 mb

  4. 965 mb
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Water vapor pressure is calculated by multiplying the total pressure by the percentage of water vapor. 1,000 mb * 0.035 = 35 mb.

Multiple choice evs water in our life where do we get water from? why conserve water uses of water

Which of the following is the BEST indicator of the actual amount of water vapor in the air?

  1. Air temperature

  2. Saturation vapor pressure

  3. Relative humidity

  4. Dew point temperature
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Dew point temperature is a direct measure of the actual amount of water vapor in the air, as it depends only on the vapor pressure. Relative humidity is temperature-dependent and changes even if the actual amount of water vapor remains constant.

Multiple choice evs water in our life where do we get water from? why conserve water uses of water

Out of the total at any time, water present in the atmosphere is

  1. 0.01%

  2. 0.02%

  3. 0.001%

  4. 0.005%
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • In the atmosphere, water exists as a gas (water vapor from evaporation), as a liquid (droplets of rain and liquid water that coats solid particles), and as a solid (snow and ice).
  • The water in the atmosphere makes up only a very small percentage of the total water on Earth i.e 0.001%.
  • Hence Out of the total at any time, water present in the atmosphere is 0.001%.
  • So, the correct answer is '0.001%'.
Multiple choice evs water in our life where do we get water from? why conserve water uses of water

Residence time of water in the atmosphere is

  1. 10 days

  2. 20 days

  3. 28 days

  4. 35 days
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Residence time is defined as the amount time a fluid, example water spends in a particular area/space. The residence time of the water is estimated at 10 days in the atmosphere.  
So, the correct answer '10 days'
Multiple choice geography in search of the source of wind atmospheric pressure, pressure belts and winds elements of weather and climate :wind monsoon phenomena and its mechanism

Atmospheric pressure in the center of a tropical cyclone is :

  1. Very low because of dense sinking air

  2. Very low because of rising warm air

  3. Very high because of sinking warm air

  4. Very high because of converging winds
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Tropical cyclone: it is a rapidly rotating storm with a low pressure centre, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain. The low pressure is due to rising warm air.

Multiple choice zoology respiratory system phases in respiration human respiratory system parts of respiration

In respiration, temperature

  1. Increases

  2. Decreases

  3. Remains the same

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

Respiration can be cellular and physiological. Cellular respiration takes place in individual cells while physiological respiration is a bulk process. Cellular respiration takes place through a set of metabolic reactions and in the cells which converts biochemical energy from the nutrients into ATP and releases wastes. These reactions are catabolic reactions that releases energy and heat in the process.

Multiple choice physics upthrust in fluids, archimedes' principle and floatation density of a fluid density of fluid density and relative density

As the pressure increases, density will

  1. remain same

  2. decrease

  3. increase

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

If pressure increases, density generally increases in response. The pressure reduces the volume taken up while the mass remains the same. That follows from the definition of density as mass per unit volume. This effect varies greatly between materials however, gases compress readily, such that density increases nearly in proportion to pressure, liquids and solids much less so.

Multiple choice physics heat - measurement application of various thermometric scales different types of thermometers measuring temperature introduction to temperature

Which of the following statements is correct?

  1. Air escaping from a punctured tyre feels cold

  2. When a gas under high pressure is permitted to expand into a region of low pressure, it gains in temperature

  3. The reading on a thermometer immersed in boiling water varies as the heat increases or decreases above the boiling point

  4. None of the above statements is correct
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Option (A) is correct. 

Reason - The air is contained at high pressure in the tube. When it escapes through a small hole, it suddenly expands. A large amount of heat is absorbed in the process of expansion resulting in considerable fall in its temperature. This is why the escaping air feels cold.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

At high altitudes, water boils at a lower temperature because

  1. the atmospheric pressure is high at high altitudes

  2. the viscosity of water is reduced at high altitudes

  3. the atmospheric pressure is low at high altitudes

  4. the surface tension of water is reduced at high altitudes
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The boiling of water depends on the atmospheric pressure at that altitude. At high altitudes, the pressure is lower, so water can not boil at $100°$. As the altitude increases, the boiling point of water reduces.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

Atmospheric pressures recorded in different cities are as follows:

Cities Shimla Bangalore Delhi Mumbai
$p$ in $N/m^{2}$ $1.01\times 10^{5}$ $1.2\times 10^{5}$ $1.02\times 10^{5}$ $1.21\times 10^{5}$


Consider the above data and mark the place at which liquid will boil first.

  1. Shimla

  2. Bangalore

  3. Delhi

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

The boiling point of a liquid is the temperature at which vapour pressure becomes equal to the atmospheric pressure. Lower the atmospheric pressure, lower is the boiling point.

Since the atmospheric pressure of the Shimla is minimum, thus the boiling point of the liquid will be lowest at Shimla.