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 physics fluid pressure pressure in air introduction to atmospheric pressure pressure exerted by air devices to measure pressure

Increase in height of mercury column indicates:

  1. decrease in atmospheric pressure

  2. increase in atmospheric pressure

  3. no change in atmospheric pressure

  4. increase in humidity in air
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The pressure at the bottom of mercury column tries to equate the atmospheric pressure outside. 
When the compensating height of mercury column increases, it means that the atmospheric pressure has indeed increased.

Multiple choice physics fluid pressure pressure in air introduction to atmospheric pressure pressure exerted by air devices to measure pressure

Suppose the density of air at Hyderabad is $\rho _ { 0 }$ and atmospheric pressure is $P _ { \mathrm { atm } }$.Suppose we wish to calculate the pressure $P$ at a height $10 \mathrm { km }$ above Hyderabad. If we use the equation $P _ { 0 } - P = \rho g z$ to calculate $P$ with $z = 10 km$. But if we take only variation of $\rho$ with height we get $P _1$. if we take only of $g$ with height we get $P _2$, if we take both $\rho$ and $g$ variations with height we get $P _3$. Then 

  1. $P = P _ { 1 } = P _ { 2 } = P _ { 3 }$
  2. $P _ { 3 } < P _ { 1 }$
  3. $P _ { 2 } > P$
  4. $P _ { 0 } - P > P _ { 0 } - P _ { 3 }$
Reveal answer Fill a bubble to check yourself
C Correct answer
Multiple choice business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

In thermal inversion.

  1. Warm ground air gets overlapped by cool air

  2. Cool ground air gets overlapped by warm air

  3. Ground temperature becomes high in winter

  4. Ground temperature becomes low in summer
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A thermal inversion takes place when a layer of warm air settles over a layer of cooler air that lies just above the ground. The warm air holds down the cool air and prevents pollutants from rising and scattering.

So, the correct option is 'Cool ground air gets overlapped by warm air'.

Multiple choice business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

After thermal inversion, pollutants pile up in.

  1. Hanging cool air

  2. Hanging warm air

  3. At the boundary of cool and warm airs

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

In a thermal inversion, the cold air holds up the pollutants and prevents it from rising and scattering.

So, the correct option is 'Hanging cool air'.

Multiple choice business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

Mist is fog with horizontal visibility of

  1. 100 m

  2. 200 m

  3. 500 m

  4. 1 km
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The visibility of less than 1 km is the standard range for fog, that is formed due to condensation of the water droplets near earth's surface. Mist is formed due to the dispersion of dust and smoke in the air along with nucleation of the water droplets and the visibility range for mist is between 1 km to 2 km. The visibility range for haze is between 2 km to 5 km.

Hence, the correct answer is '1 km'

Multiple choice business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

Fog is formed by

  1. Smoke

  2. Condensation of water vapours

  3. Condensation of water vapours over dust particles

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

When there is temperature difference between the land and the atmosphere, and the land is also having low temperature, then the condensation of the water droplets/water vapours can begin near the surface. The condensation process occurs around the dust particles present in the air, so the dust particles provide nucleation for fog formation. Smoke and dust forms the haze. Smoke, dust and water droplets form the mist. Hence, the correct answer is ‘Condensation of water vapours over dust particles’.

Multiple choice biology living in harmony climate factors abiotic components organisms and environment

In the stratosphere, the air temperature normally:

  1. Decreases with increasing height

  2. Increases with increasing height

  3. Both increases and decreases depending on the season

  4. Cannot be measured
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In the stratosphere, temperature increases with altitude because the ozone layer absorbs ultraviolet radiation from the sun, which heats the surrounding air.

Multiple choice biology living in harmony climate factors abiotic components organisms and environment

Low clouds retard surface cooling at night better than clear skies because:

  1. The clouds absorb and radiate infrared energy back to earth

  2. The water droplets in the clouds reflect infrared energy back to earth

  3. The clouds start convection currents between them

  4. The clouds are better conductors of heat than is the clear night air
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Clouds act as a blanket at night by absorbing longwave infrared radiation emitted by the Earth's surface and re-radiating a portion of it back down, which reduces the rate of surface cooling.

Multiple choice biology living in harmony climate factors abiotic components organisms and environment

If a glass of water were surrounded by saturated air:

  1. The level of the water in the glass would slowly decrease

  2. The water's temperature would slowly increase

  3. The level of the water in the glass would not change

  4. The water's temperature would slowly decrease
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Saturated air contains the maximum amount of water vapor possible at a given temperature, meaning there is no net evaporation or condensation occurring at the water surface. Therefore, the water level remains constant because the rate of evaporation equals the rate of condensation.

Multiple choice chemistry substances in the surroundings - their states and properties measurement of density properties of substances fundamental and derived units

When air is cooled, its density increases. State whether true or false.

  1. True

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

 As on cooling volume of air decreases and its mass remains constant so its density increases as  Density = $\dfrac{mass}{volume}$

hence given statement is correct so option (A) is correct

Multiple choice chemistry substances in the surroundings - their states and properties measurement of density properties of substances fundamental and derived units

The hot air balloon rises because it is

  1. denser

  2. less dense

  3. equally dense

  4. the given statement is wrong
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The hot air balloon has the hot air filled in it and the density of air is more than the hot air. So, the normal air or atmospheric air has the tendency to remain below than the hot air as the objects having the more density remains below than the objects having less density.

Multiple choice chemistry substances in the surroundings - their states and properties measurement of density properties of substances fundamental and derived units
Density of a material varies with temperature.

  1. True

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

Density of the material is defined as mass per unit volume. Since, volume is temperature dependent, increasing the temperature of the material (with few exceptions) decreases the density of material by increasing its volume. 

Hence, given statement is true.

Multiple choice chemistry substances in the surroundings - their states and properties measurement of density properties of substances fundamental and derived units

One litre of cool air weighs heavier than one litre of hot air because of the : 

  1. Increased number of collisions between . the molecules

  2. Increased number of molecules at. low temperature

  3. Greater energy of molecules at high temperature

  4. Lower energy of molecules at high temperature
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Their exists less no. of molecules at the high temperature and high no. of molecules at the low temperature i.e. in the cold conditions.

Multiple choice chemistry substances in the surroundings - their states and properties measurement of density properties of substances fundamental and derived units

The clouds float in the atmosphere because of their low.

  1. Pressure

  2. Velocity

  3. Temperature

  4. Density
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
As the rule of thumb, you can assume that the things with less density float on things with higher density. And water do have less density than air that's the reason clouds float in the atmosphere.