Tag: air, winds and cyclones

Questions Related to air, winds and cyclones

A strip of paper is held between thumb and finger. If we blow over the paper, what will happen to the paper strip ?

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth

  1. The paper strip will be lifted up

  2. The paper strip will bend down

  3. The paper strip will oscillate up and down alternately

  4. None of the above

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Correct Option: A
Explanation:
The still air below the paper had greater pressure than the moving air above the paper resulting in paper getting pushed up.

An experiment is conducted to understand air pressure. Two identical balloons are filled with little water and blown. Then they are tied to a string some distance apart. What happens when air is blown in between them ?

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth

  1. They move closer to each other.

  2. They move further apart.

  3. One moves up and other moves down

  4. none of the above

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Correct Option: A

How are monsoon winds formed?

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

  1. The air over the land gets heated and rises. This causes the winds to flow from the oceans towards the land, which gives rise to Monsoon winds.

  2. The pressure difference in adjoining areas gives rise to air movement which leads to formation of Monsoon winds

  3. Air that is warmed up near the Equator, moves towards each pole causing the Monsoon winds to blow.

  4. None of the above

Show answer
Correct Option: A
Explanation:
The air over the land gets heated and rises. This causes the winds to flow from the oceans towards the land. These are monsoon wind.

What is the direction of Monsoon winds in Summer ?

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

  1. From ocean towards the land

  2. From land towards the ocean

  3. From equator towards the poles

  4. From poles towards the equator

Show answer
Correct Option: A
Explanation:
The air over the land gets heated and rises. This causes the winds to flow from the oceans towards the land. These are monsoon winds.

Why do the polar winds not move in exact North-South direction ?

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

  1. The revolution of the earth affects the direction of the winds.

  2. The rotation of the earth affects the direction of the winds.

  3. The Other air currents in the atmosphere change the direction of the polar winds.

  4. None of these

Show answer
Correct Option: B
Explanation:
 A change in direction of wind is however, caused by the rotation of the earth.

What is the direction of Monsoon winds in winter ?

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

  1. From oceans to land

  2. From land to oceans

  3. From equator to poles

  4. From poles to equator

Show answer
Correct Option: B
Explanation:
In winter, the direction of the wind flow gets reversed; it flows from the land to the ocean.

Which of the following is not true about the formation of winds due to uneven heating of land at Equator and Polar regions ?

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

  1. The winds blow from the $0-30^o$ latitudes, taking place of the warm air at the equator that has risen up, towards the equator and constitute the Polar winds.

  2. The cool air at the poles rushes in to take place of the warmer winds in the $60^o$ belt and constitute the Polar winds.

  3. The winds of the wind is not exactly in the North-South direction because of the rotation of the Earth.

  4. The pressure difference between the equatorial and polar regions leads to the formation of winds in the North-South direction

Show answer
Correct Option: D
Explanation:
Formation of winds at the equator and polar region involves following few steps:
1. The warm air rises, and the cooler air from the regions in the 0–30 degrees latitude belt on either side of the equator moves in.
2.  At the poles, the air is colder than that at latitudes about 60 degrees. 
3.  The warm air at these latitudes rises up and the cold wind from the polar regions rushes in, to take its place
4.  A change in direction is, however, caused by the rotation of the earth.

What is the importance of Monsoon winds ?

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

  1. They lower the temperature of areas where temperature is usually high.

  2. They bring rain and play important role in water cycle.

  3. They clear up the sky and make atmosphere sunny.

  4. None of the above

Show answer
Correct Option: B
Explanation:

The correct answer is option(B).

The winds from the oceans carry water and bring rain. It is a part of the water cycle. The monsoon winds carry water and it rain.

Which area on the Earth receives maximum sunlight ?

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

  1. Polar region

  2. Equatorial region

  3. Along the latitude of Tropic of Cancer

  4. Along the latitude of Tropic of Capricorn

Show answer
Correct Option: B
Explanation:
The Earth's shape is spherical. This causes the Sun's rays to strike the Earth's surface at different angles, creating variances in temperatures on Earth. The equator receives the most direct sunlight because sunlight arrives at a perpendicular (90 degrees) angle to the Earth.

What is the basis for the formation of winds due to heating of different areas on Earth ?

physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

  1. The air in cold temperature regions gets cooled, expands and becomes more dense and rises up. It's place is taken by heavier air from adjacent regions.

  2. The air in cold temperature regions gets cooled up, expands and becomes less dense and rises up. It's place is taken by heavier air from adjacent regions.

  3. The air in high temperature regions gets heated up, expands and becomes less dense and rises up. It's place is taken by heavier air from adjacent regions.

  4. The air in high temperature regions gets heated up, contracts and becomes more dense and rises up. It's place is taken by heavier air from adjacent regions.

Show answer
Correct Option: C
Explanation:
In summer, near the equator the land warms up faster and most of the time the temperature of the land is higher than that of water in the oceans. The air over the land gets heated and rises. This causes the winds to flow from the oceans towards the land. And we know air expands on heating and and becomes less dense and therefore rises up.