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 geography hydrologic cycle the atmosphere elements of weather and climate :humidity hydrologic cycle and its components elements of weather and climate : temperature

Relative humidity is measure in terms of ________________.

  1. Grams per cubic diameter

  2. Centimeter per second square

  3. Bars

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

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

Multiple choice geography hydrologic cycle the atmosphere elements of weather and climate :humidity hydrologic cycle and its components elements of weather and climate : temperature

Absolute humidity is the ____________ amount of water vapor present in the air.

  1. half

  2. total

  3. one third

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

Absolute humidity is the total amount of water vapor present in the air. In other words, the weight of water vapor per volume of air is referred to as the absolute humidity. It is usually expressed as grams of water vapor per cubic meter of air. Absolute humidity varies with the expansion or contraction of air, even though the amount of water vapor is constant.

Multiple choice geography hydrologic cycle the atmosphere elements of weather and climate :humidity hydrologic cycle and its components elements of weather and climate : temperature

Absolute Humidity is the ___________.

  1. Actual amount of water vapour present in air.

  2. Actual amount of solid particles present in air.

  3. Both a and b

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

Absolute humidity is the actual amount of water vapour present in air. It is expressed as grams of moisture per cubic meter of air. It is calculated by finding the mass of water vapor in an area and dividing it by the mass of air in the same area. Absolute humidity may range from 0 gram per cubic meter in dry air to 30 grams per cubic meter when the vapour is saturated at 30 $^oC$. As the temperature of air increase, humidity also increases.

Multiple choice geography hydrologic cycle the atmosphere elements of weather and climate :humidity hydrologic cycle and its components elements of weather and climate : temperature

Determining factors for humidity in the air is, ____________.

  1. Time

  2. Place

  3. Temperature

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

Humidity means the amount of water vapor present in the air. Time, place and temperature play important role in determining humidity. Amount of humidity changes with season and weather variation. Nearness to a water body,i.e, place plays an important role in determining humidity and lastly the moisture-holding capacity of air increases with increasing temperature.

Multiple choice geography hydrologic cycle the atmosphere elements of weather and climate :humidity hydrologic cycle and its components elements of weather and climate : temperature

Relative Humidity is more important from Absolute Humidity because __________________.

  1. It is expressed in percentage.

  2. It is expressed in the ratio of amount of water vapour present in the air at a given temperature and that of amount of water vapour air can hold at that temperature.

  3. Both a and b

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

Relative humidity is expressed as the amount of water vapor in the air as a percentage of the total amount that could be held at its current temperature. Absolute humidity is the measure of water vapor in the air, regardless of temperature. Relative humidity is cited in weather forecasts. It affects how we feel temperature. That’s why relative humidity is important.

Multiple choice geography hydrologic cycle the atmosphere elements of weather and climate :humidity hydrologic cycle and its components elements of weather and climate : temperature

The _____________ plays a very important role in heating and cooling the atmosphere.

  1. Water Vapours

  2. Humidity

  3. Precipitation

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

The water vapor is one of the most variable gases in the atmosphere  which is present in small amount but is none the less very important. Water vapor plays an significant role in the insulating action of the atmosphere. The moisture holding capacity of the air varies in the direct proportion to its temperature. In other words the higher the temperature of the air,  the larger the capacity to hold moisture and vice versa. 

Multiple choice geography hydrologic cycle the atmosphere elements of weather and climate :humidity hydrologic cycle and its components elements of weather and climate : temperature

What is the degree of saturation?

  1. The ratio of the actual relative humidity to the saturated specific humidity at the same temperature.

  2. The ratio of the actual specific humidity to the saturated specific humidity at the same temperature.

  3. The ratio of the saturated specific humidity to the actual specific humidity at the same temperature

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

The ratio of the actual specific humidity to the saturated specific humidity at the same temperature.
Degree Of Saturation: It is the percentage of water that occupies the pore spaces present in soil and is said to be a degree of saturation.

Multiple choice geography hydrologic cycle the atmosphere elements of weather and climate :humidity hydrologic cycle and its components elements of weather and climate : temperature

The degree of saturation varies between __________.

  1. 1 to infinity

  2. 0 to infinity

  3. 0 to 1

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

0 to 1 

The saturated mixing ratio is the maximum amount of water vapor that can be held in the air at a particular temperature. For example, let's say the humidity is 0.8 and the saturated mixing ratio is 0.5. Multiply the mixing ratio by the saturated mixing ratio.

Multiple choice geography hydrologic cycle the atmosphere elements of weather and climate :humidity hydrologic cycle and its components elements of weather and climate : temperature

The ratio of partial pressure of water vapour in a mixture to the saturation pressure of water at the same temperature of the mixture is called as _________.

  1. humidity

  2. partial humidity

  3. specific humidity

  4. relative humidity
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The ratio of the mass of water vapour actually present in certain volume of air (m) to the mass of water vapour (M) required to saturate the same volume of air at the same temperature is called relative humidity (R.H)
Multiple choice geography hydrologic cycle the atmosphere elements of weather and climate :humidity hydrologic cycle and its components elements of weather and climate : temperature

The capacity of the air to hold water vapour _______.

  1. Increases as the temperature increases

  2. Decreases as the temperature increases

  3. Increases as the temperature decreases

  4. Decreases as the temperature decreases
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Increases as the temperature increases,

The water-vapor content of the atmosphere varies from place to place and from time to time because the moisture-holding capacity of air is determined by temperature. At 30 °C (86 °F), for example, a volume of air can contain up to 4 percent water vapour. At -40 °C (-40 °F), however, it can hold no more than 0.2 percent. The more the temperature more is the water holding capacity.

Multiple choice geography hydrologic cycle the atmosphere elements of weather and climate :humidity hydrologic cycle and its components elements of weather and climate : temperature

When water particles condenses on air and dust, it forms __________.

  1. mist

  2. fog

  3. frost

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

It forms mist. It is a phenomenon caused by the small water droplets of water suspended in the air. When the warm moist air meets the sudden cooling, mist is formed.

Multiple choice biology natural disasters: winds, storms and cyclones composition of air introduction to air natural resources - air

Warm air is heavier than cold air. State whether the above statement is true or false and explain.

  1. True, because warm air contains more heat

  2. True, because warm air molecules are separated by greater distances

  3. False, because molecules of warm air expand and become less dense

  4. False, because cold air contain extra temperature than hot air
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Warm air is lighter than cold air because they have more heat energy, which results in the increase in distances between the molecules. This decraeses the density, and hence makes it lighter than cold air.