Tag: global pressure belts

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Questions Related to global pressure belts

Multiple choice geography in search of the source of wind global pressure belts pressure belts atmospheric conditions

Trade wind are due to __________.

  1. conduction

  2. convection

  3. radiation

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

Trade winds are result of combination of both convection of air currents and rotation of earth.

Due to warmer air at equator the process of convection takes place where heat is transferred to the lower heat areas from higher heat areas.

Thus warmer winds are moved towards the each pole respectively from equator and due to rotation of earth these winds fall back to the equator.

These winds blow nearly constantly and always in the same direction. The trade winds have been used for many centuries to decrease the transit time of ships traveling around the world.

Multiple choice geography in search of the source of wind global pressure belts pressure belts atmospheric conditions

Daily weather changes in the atmosphere are associated with ______.

  1. troposphere

  2. mesosphere

  3. inosphere

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

The lowest layer of the earth that ranges up to 16 km thick is called troposphere. Most of the weather phenomenon takes place in this region. The troposphere is denser than the layers of the atmosphere above, as it contains up to 75% of the mass of the atmosphere.

Multiple choice geography in search of the source of wind global pressure belts pressure belts atmospheric conditions

Atmospheric pressure generated on the earth's surfaces is due to ________.

  1. gravitational force of earth

  2. Earth revolution

  3. Earth rotation

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

Atmospheric pressure is the weight of atmosphere pushing down on itself.

Earth exerts gravitational force that tends to pull the gas molecules present in the atmosphere towards its center. This creates atmospheric pressure.

Atmospheric pressure is sometimes expressed in terms of the number of inches in a column of Mercury

Atmospheric pressure is measured with a barometer.

Multiple choice geography in search of the source of wind global pressure belts pressure belts atmospheric conditions

The velocity of winds is governed by ______________.

  1. temperature

  2. rotation of the Earth

  3. pressure gradient

  4. All the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Winds originate due to the pressure gradient i.e. winds travel from higher pressure region to the lower pressure region. The more the pressure gradient, the greater will be the wind speed and vice-versa. Hence option C is correct.
  • Rotation of the earth may affect wind direction eg Ferrel's law, but they do not govern the wind speed.
Multiple choice geography in search of the source of wind global pressure belts pressure belts atmospheric conditions

Which pressure belts are called the horse latitudes?

  1. Equatorial Low Pressure Belt

  2. Sub-Tropical High Pressure Belt

  3. Sub-Polar Low Pressure Belt

  4. Polar High Pressure Belt
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sub-Tropical high pressure belt,

The horse latitudes are located at about 30 degrees north and south of the equator. It is common in this region of the subtropics for winds to diverge and either flow toward the poles (known as the prevailing westerlies) or toward the equator (known as the trade winds). These diverging winds are the result of an area of high pressure, which is characterized by calm winds, sunny skies, and little or no precipitation.

According to legend, the term comes from ships sailing to the New World that would often become stalled for days or even weeks when they encountered areas of high pressure and calm winds. Many of these ships carried horses to the Americas as part of their cargo. Unable to sail and resupply due to lack of wind, crews often ran out of drinking water. To conserve scarce water, sailors on these ships would sometimes throw the horses they were transporting overboard. Thus, the phrase 'horse latitudes' was born.

Multiple choice geography in search of the source of wind global pressure belts pressure belts atmospheric conditions

Which pressure belt is also known as the 'doldrums'?

  1. Equatorial low pressure belt

  2. Sub-Tropical high pressure belt

  3. Sub-Polar low pressure belt

  4. Polar high pressure belt
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Equatorial trough of low pressure is the zone of convergence of trade winds blowing equatorward from the sub-tropical belts of high pressure in the northern and southern hemisphere. Within this belt the winds are light and variable with frequent calms. That is why this belt is also known as doldrums.

Multiple choice geography in search of the source of wind global pressure belts pressure belts atmospheric conditions

The sub-polar high pressure belts lies around poles between 80 90 N and S latitudes.

  1. True

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

True,

Pressure Belts of Earth. On the earth's surface, there are seven pressure belts. They are the Equatorial Low, the two Subtropical highs, the two Subpolar lows, and the two Polar highs. Except the Equatorial low.

Multiple choice geography in search of the source of wind global pressure belts pressure belts atmospheric conditions

In the northern hemisphere, due to Ferrel's law the wind is deflected  ______.

  1. Towards its right

  2. Towards its left

  3. Towards its north

  4. Towards its south
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ferrel's law states that due to the Coriolis effect caused by the Earth's rotation, winds are deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.