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 biology physical resources air and winds wind energy air as a natural resource

Weather is predicted by considering 

  1. The movement of air

  2. Amount of water vapour

  3. Temperature

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

Accurate weather prediction can be made only if all the air measurements i.e. temperature, humidity and wind direction are considered. 

Moving air is known as the wind which is caused by differences in air pressure. It is the air which moves from an area or high pressure to an area of low pressure and causes the day to day changes in weather. Thus the wind brings in different air masses and different weather patterns. The greater the difference in air pressure, the greater is the wind speed. 
The amount of water vapour present in the atmosphere is known as humidity. The measure of the water vapour present in the atmosphere as compared to vapour content at saturation levels is known as relative humidity. The formation of clouds and rain occurs only at 100% relative humidity and not near the surface. The rising and cooling air forms clouds and increases humidity. The fall of precipitation from the clouds occurs into layers with lower humidity. 
The measure of air's hotness and coldness is known as temperature. Temperature affects the type of precipitation that can form. If the atmospheric conditions are such that precipitation can occur and the temperature is above freezing then rain occurs. If the temperature is below freezing then, snow formation occurs. 
Thus, the correct answer is option D. 

Multiple choice biology physical resources air and winds wind energy air as a natural resource

When the air is saturated, which of the following statements is NOT correct?

  1. The air temperature equals the wet-bulb temperature

  2. The relative humidity is 100 percent

  3. The air temperature equals the dew point temperature

  4. An increase in temperature will cause condensation to occur
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When air is saturated, relative humidity is 100 percent and the dew point equals the air temperature. Increasing the temperature would decrease the relative humidity, not cause condensation.

Multiple choice biology physical resources air and winds wind energy air as a natural resource

What scale is useful to record the force of wind ?

  1. Decibel

  2. Richter

  3. Beau fort

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

The Beaufort scale is an empirical measure that relates wind speed to observed conditions at sea or on land. It ranges from 0 (calm) to 12 (hurricane-force winds). Decibels measure sound intensity, Richter scale measures earthquake magnitude, and Fujita scale (misspelled as Fajita here) measures tornado intensity.

Multiple choice chemistry grouping of materials properties of materials grouping and classification of objects nature of things

During the formation of rain, when water vapour changes back to liquid in the form of rain drops:

  1. Heat is absorbed

  2. Heat is released

  3. Heat is first absorbed and then released

  4. There is no exchange of heat
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The energy contained in the gaseous form (vapour) is more than the energy contained in the liquid form (water). Therefore when vapour changes to water it loses some heat.

Multiple choice biology water a precious resource sources of water and water cycle availability and forms of water the water cycle

Which of the following is true?

  1. The gaseous form is the water vapour present in the air around us.

  2. The liquid form is the water vapour present in the air around us.

  3. The gaseous form is the water vapour present in the river.

  4. The gaseous form is the water vapour present at the poles of the earth.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The gaseous form is the water vapor present in the air around us.

Multiple choice physics transfer of heat applications of convection convection thermal energy transfers

If there were no atmosphere around the earth, the temperature of the earth will

  1. Increase

  2. Decrease

  3. Increase during day and decrease during night

  4. Remain unaffected
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
If there were no atmosphere around the earth, the temperature will decrease.
Earth's atmosphere traps heat from sun and keeps it near to the surface of earth, popularly known as green house effect. It keeps warming the planet and sustaining life on earth. If there were no atmosphere, average temperature drops below zero.
So, we can say that it will decrease.
Multiple choice physics winds, storms and cyclones the concept of bernoulli's principle air exerts pressure wind and pressure wind and rain uneven heating of earth

Which of the following will rise the highest?

  1. Air at 10$^o$C
  2. Air at 40$^o$C
  3. Air at 20$^o$C
  4. Air at -5$^o$C
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

As the temperature of air rises, it becomes lighter and moves at a faster rate and thus it rises higher in the atmosphere.

Thus air at $40^oC$ will rise the highest in the atmosphere.

Multiple choice physics air, winds and cyclones the concept of bernoulli's principle air exerts pressure wind and pressure wind and rain uneven heating of earth

Which of the following is/are true?

  1. The wind blows because of differences in air pressure from one location to another

  2. Wind blows from areas of high pressure toward areas of low pressure

  3. If the high pressure area is very close to the low pressure area, or if the pressure difference is very great, the wind can blow very fast

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Wind flowing is the result of pressure difference in air between the two regions. Winds flows from the region of higher pressure to the region of lower pressure. Greater is the pressure difference, greater is the speed of the wing flowing and vice-versa.
Thus all the statemements are true, so option D is correct.
Multiple choice physics air, winds and cyclones the concept of bernoulli's principle air exerts pressure wind and pressure wind and rain uneven heating of earth

Which of the following is/are NOT true?

  1. Temperature also makes changes in air pressure

  2. In cold air, the molecules are more closely packed together than in warm air, so cold air is more dense than warm air

  3. Air pressure depends on the density of the air, or how close together its molecules are

  4. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Air pressure is dependent on the temperature of air. More is the temperature, more is the air pressure and vice-versa. In cold air, the temperature is low and so the molecules of air have less kinetic energy. Due to this, the molecules are more closely packed together than in warmer air and so cold air is more dense than warm air. This also suggests that lesser is the temperature of air, more is the density of air and less is the air pressure. Hence, air pressure also depends on the density of the air.
So, all the statements are true.
Multiple choice physics air, winds and cyclones the concept of bernoulli's principle air exerts pressure wind and pressure wind and rain uneven heating of earth

____ pressure indicates sinking air where clouds cannot form. ____ pressure indicates rising air, which allows clouds to form, bringing rain or snow. Fill in the blank.

  1. High, high

  2. High, low

  3. Low , low

  4. Low, high
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

High pressure indicates sinking air where clouds cannot form. Low pressure indicates rising air, which allows clouds to form, bringing rain or snow.