Tag: geography

Quizzes (501) Questions (6412)

Questions Related to geography

Multiple choice geography in search of the source of wind variations in atmospheric pressure properties of air pressure belts the concept of bernoulli's principle air exerts pressure

The doldrums are in the _______________.

  1. Horse latitudes

  2. Sub-polar low pressure belt

  3. Equatorial low pressure belt

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

Due to the intense heating from sun rays around the equator, the air in this region gets hot and hence ascends upwards, thus creating a low pressure in the region. Hence it is the equatorial low-pressure belt and is also called doldrums as it is the region of extreme calmness, not as much as a breeze.

Multiple choice geography in search of the source of wind variations in atmospheric pressure properties of air pressure belts

 Consider the following statements and identify the right ones.
i) Lower layers of atmosphere have low pressure.
ii) Higher layers of the atmosphere have high pressure.

  1. i only

  2. ii only

  3. both

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

Although air is well mixed throughout the atmosphere, the atmosphere itself is not physically uniform but has significant variations in temperature and pressure with altitude, which define a number of atmospheric layers i.e. when lower layers have atmospheric pressure and higher ones have low atmospheric pressures due to the altitude.

Multiple choice geography in search of the source of wind variations in atmospheric pressure properties of air pressure belts

Consider the following statements and identify the right ones :-
i) Air pressure decreases when air descends.
ii) Air pressure at sea level is lower than at the mountain top.

  1. i only

  2. ii only

  3. Both

  4. None
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Air pressure increases when air descends. Lower pressure at higher altitudes cause the temperature to be colder on top of a mountain than at sea level. As air rises, the pressure decreases. It is this lower pressure at higher altitudes that causes the temperature to be colder on top of a mountain than at sea level.

Multiple choice geography in search of the source of wind variations in atmospheric pressure properties of air pressure belts

Which of the following affects atmospheric pressure?

  1. Altitude

  2. Temperature

  3. Rotation of Earth

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

The factors which affects in the distribution oof atmospheric pressure are, altitude, temperature and rotation of the earth. Atmospheric pressure decreases with increaseing altitude. Regional variation of pressure are produced by temperature. Movement of wind are also responsible for pressure channge, prevailing wind systems are caused by rotation of the earth.

Multiple choice geography in search of the source of wind variations in atmospheric pressure properties of air pressure belts

The weight of water vapour per unit weight of air is called?

  1. Specific Humidity

  2. Relative humidity

  3. Absolute Humidity

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

The weight of water vapor per unit weight of air is called Specific humidity. It is usually expressed as grams of vapor per kilogram of air. The rate of evaporation of water from any surface is directly proportional to the specific humidity, the difference between the surface and the adjoining air. It is an extremely useful quantity in meteorology. Specific humidity does not change with temperature and pressure.

Multiple choice geography in search of the source of wind variations in atmospheric pressure properties of air pressure belts

Consider the following statements and identify the right ones.
i) The low temperature at poles causes air to expand.
ii) High temperatures along equator cause air to contract.

  1. (i) only

  2. (ii) only

  3. Both of these

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

Low temperature causes air to contract and higher temperature causes air to expand.

Multiple choice geography in search of the source of wind variations in atmospheric pressure properties of air pressure belts

 Consider the following statements and identify the right ones.
i) The temperature of the air rises when its pressure falls.
ii) The pressure of the air falls when the temperature rises.

  1. i only

  2. ii only

  3. Both of these

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

As air warms up, the molecules in the air become more active and they use up more individual space. This leads to a rise in the air pressure. Similarly, when the air cools down the molecules remain compact, leading to a decrease in air pressure.

Multiple choice geography in search of the source of wind variations in atmospheric pressure properties of air pressure belts the concept of bernoulli's principle air exerts pressure

In the Earth's atmosphere, the atmospheric pressure  ________.

  1. remains constant with height

  2. increases with height

  3. decreases with height

  4. first increase and then decrease with height
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

As we go up the pressure decreases with altitude.

This is because at higher altitudes number of air molecules present are low when compared to those that are present in the lower atmosphere.

Moreover gravitational pull which is responsible for atmospheric pressure is low on the molecules that are away from its surface than those that are closer to it.