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

Air flows from areas of 

  1. low pressure to high pressure

  2. high pressure to low pressure

  3. midpressure to midpressure

  4. low temperature to high temperature
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Air naturally moves from regions of higher pressure to regions of lower pressure to reach equilibrium.

Multiple choice

In a mercury barometer, when  air pressure increases, the mercury in the tube __________.

  1. rise

  2. fall

  3. stay the sane

  4. goes up and down at random
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In a mercury barometer, increasing atmospheric pressure pushes down on the mercury reservoir, forcing more mercury up the glass tube. The height of the mercury column directly indicates air pressure. When pressure decreases, the mercury column falls. The 'stay the sane' option contains a typo for 'stay the same'.

Multiple choice landforms of the earth and internal forces general physical geography general knowledge

Evaporation is greater when __________.

  1. warm air flows over warm current

  2. warm air flows over cold current

  3. cold air flows over warm current

  4. cold air flows over cold current
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Evaporation is highest when cold air moves over a warm water surface because the air is rapidly heated from below, increasing its capacity to hold moisture. Warm air over warm water or cold air over cold water results in less significant temperature gradients and lower evaporation rates.

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Increase in atmospheric temperature due to $CO _2$ is

  1. Pasteur effect

  2. Blackman effect

  3. Emerson effect

  4. Green-house effect
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A. Pasteur effect is the inhibition of fermentation or oxidation of glucose when the concentration of oxygen is increased.
B. Blackman effect describes the law of limiting factors according to which if a process is dependent on a number of factors then its rate is limited by the slowest factor.
C. Emerson effect is the increase in rate of photosynthesis when the light intensity is increased beyond 680 nm.
D. Green house effect is the increase in atmospheric temperature due to warming of earth's surface when the sun radiations are trapped in the earth. The radiations are trapped in earth because of green house gases like carbon dioxide.
So, the correct answer is 'Green-house effect'.
Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Without the atmospheric greenhouse effect, the average surface temperature would be:

  1. Higher than at present

  2. Lower than at present

  3. The same as it is now

  4. Much more variable than it is now
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The greenhouse effect traps heat in the atmosphere, keeping the Earth's surface significantly warmer than it would be otherwise. Without it, the average temperature would be much lower.

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

At night, low clouds:

  1. Enhance the atmospheric greenhouse effect

  2. Weaken the atmospheric greenhouse effect

  3. Are often caused by the atmospheric greenhouse effect

  4. Have no effect on the atmospheric greenhouse effect
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Low clouds at night act as a blanket, absorbing infrared radiation emitted by the Earth's surface and re-emitting it back downwards, which enhances the greenhouse effect and keeps the surface warmer.

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

If CO$ _2$ is absent in atmosphere of earth then 

  1. Temperature will decrease

  2. Temperature will increase

  3. Plants will flourish well

  4. No effect
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The total carbon dioxide content in the atmosphere is 0.03%. The percentage of carbon dioxide is balanced by respiration and photosynthesis. Solar radiation falls on earth's surface heating it, while a small proportion is reflected back, and earths surface re-emits heat in the form of infrared radiation but part of this does not escape into space as atmospheric gases (e.g., carbon dioxide, methane, etc.) absorb a major fraction of it. These gases like carbon dioxide and methane are commonly known as greenhouse gases because they are responsible for the greenhouse effect. Increase in the level of greenhouse gases has led to considerable heating of earth leading to global warming. Thus, the correct answer is option A..

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Excess atmospheric $CO _2$ increases green house effect as $CO _2$

  1. Is opaque to infra-red rays

  2. Is not opaque to infra-red rays

  3. Precipitates dust in the atmosphere

  4. Reduces atmospheric pressure
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carbon dioxide is a greenhouse gas. It absorbs the long wavelength infrared radiations. The chemical bond between carbon and oxygen absorb infrared light very well and traps the heat from escaping, so they are considered to be opaque to the infra-red rays as these cannot pass across the carbon dioxide. Carbon dioxide molecules vibrate on receiving energy from the photon and allows molecules to capture the infrared photons (radiation). 

Hence, the correct answer is 'Is opaque to infra-red rays'

Multiple choice maths unchanging relations algebra aid introduction to unknowns measures and relations

Some situations are given below. State true or false:
The temperature of a day is variable.

  1. True

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

Since the temperature of a day depends on the weather. For example, in summers, the temperature will be higher in Celsius whereas in winters, the temperature is low in Celsius. Therefore, the temperature always varies.


Hence, the given statement "The temperature of a day is variable." is true.

Multiple choice chemistry planet earth acid deposition air and air pollution natural resources- air, water and land

Temperature of troposphere decreases with altitude. This is because of_____.

  1. high pressure of air

  2. gases present in air

  3. low density of air

  4. all of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Generally, temperatures decrease with increasing height because the atmosphere distributes itself according to gravity.

In the troposphere, the temperature generally decreases with altitude. The reason is the troposphere's gases absorb very little of the incoming solar radiation. Instead, the ground absorbs this radiation and then heats the tropospheric air by conduction and convection.