Tag: atmosphere- wind

Questions Related to atmosphere- wind

Which of the following is the cause of the land breeze?

  1. The land gets heated up fast during summers.

  2. The hot air over the land rises up.

  3. The air pressure above the land decreases.

  4. All of the above


Correct Option: D
Explanation:

The air molecules are held by strong intermolecular forces. During, the daytime when the air above the land gets heated up, the air molecules absorbs the heat and the intermolecular forces between the air molecules become weak and its kinetic energy increases. The air molecules move apart and become less dense and they become lighter and rises up. This creates a low-pressure zone on land and thus cold air from the sea rushes to land and thus creates sea breeze. Thus, the correct answer is option D.

Which of the following phenomena may lead to rain near the equatorial region?

  1. The warm air rises up.

  2. The colder air settles down.

  3. The wind speed increases due to uneven heating.

  4. All of the above


Correct Option: D
Explanation:

The uneven heating of the air takes place due to the greater intensity of sunlight at the equator as compared to that of poles. Due to greater intensity of sunlight at the equator the air gets heated up, the air molecules absorbs the heat and the inter molecular forces between the air molecules becomes weak and its kinetic energy increases. The air molecules becomes lighter and rises up. This creates a low pressure zone on the equator. The air is cold at the poles as the intensity of sunlight is less so the cold air settles down and creates a high pressure zone above the poles. The air moves from high pressure to low pressure zone which is from poles to the equator at high speed and this may lead to precipitation of water vapor as rain.

So, the correct answer is option A.

Sea breeze blows during _________

  1. Summer

  2. Winter

  3. Day

  4. Night


Correct Option: C
Explanation:

During the day, the land gets heated faster than the water. The air over the land becomes hotter and rises up. The cooler air from the sea rushes in towards the land to take its place. The warm air from the land moves towards the sea to complete the cycle. The air from the sea is called the sea breeze.

The sea breeze is conducted due to the creation of high pressure on the 

  1. Land

  2. Sea

  3. Air

  4. None of the above


Correct Option: A
Explanation:

During, the daytime when the air above the land gets heated up, the air molecules absorbs the heat and the intermolecular forces between the air molecules become weak and its kinetic energy increases. The air molecules move apart and become less dense and they become lighter and rises up. This creates a low-pressure zone on land and high pressure on above the sea thus cold air from the sea rushes from sea to land and creates sea breeze.

So, the correct answer is option B.

Which of the following area is created over land during land breeze?

  1. High pressure

  2. Low pressure

  3. Low temperature

  4. All of the above


Correct Option: B
Explanation:

During, the daytime when the air above the land gets heated up, the air molecules absorbs the heat and the intermolecular forces between the air molecules become weak and its kinetic energy increases. The air molecules move apart and become less dense and they become lighter and rises up. This creates a low-pressure zone on land and thus cold air from the sea rushes from sea to land and thus creates sea breeze. Thus, the correct answer is option B.

The freezer in the refrigerator is generally mounted on the top for proper cooling. Which of the following property of air is demonstrated by this?

  1. The cold air settles down

  2. The hot air rises up.

  3. The low temperature causes uniform cooling.

  4. None of the above


Correct Option: A
Explanation:

The freezer in the refrigerator is generally mounted on the top for proper cooling. The freezer cools the air. The air after getting cooled settles down and helps in proper and even cooling. Thus, the correct answer is option A.

The uneven heating of land takes place due to 

  1. Direction of sunlight

  2. Direction of wind

  3. Temperature of the earth

  4. None of the above


Correct Option: A
Explanation:

The uneven heating of the air takes place due to the greater intensity of sunlight at the equator as compared to that of poles. Due to greater intensity of sunlight at the equator the air gets heated up, the air molecules absorb the heat and the intermolecular forces between the air molecules become weak and its kinetic energy increases. The air molecules become lighter and rise up. This creates a low-pressure zone on the equator. The air is cold at the poles as the intensity of sunlight is less so the cold air settles down and creates a high-pressure zone above the poles. Thus, the correct answer is option A.

The sea breeze is caused due to the low pressure generated over

  1. Land

  2. Sea

  3. Air

  4. Both A and B


Correct Option: B
Explanation:

During, the daytime when the air above the land gets heated up, the air molecules absorbs the heat and the intermolecular forces between the air molecules become weak and its kinetic energy increases. The air molecules move apart and become less dense and they become lighter and rises up. This creates a low-pressure zone on land and thus cold air from the sea rushes from sea to land and thus creates sea breeze.

So, the correct answer is option B.

Suppose it is a winter night and at about 11 p.m., the air cools to the dew-point temperature and a thick radiation fog develops. If the air continues to cool during the night, in 5 hours the dew point temperature will probably:

  1. Decrease as the air becomes drier

  2. Decrease as the air becomes moister

  3. Increase as the air becomes drier

  4. Increase as the air becomes moister


Correct Option: A

Where are the days and nights of equal length all year long?

  1. At $66.5^{o}$

  2. Nowhere

  3. At $23.5^{o}$

  4. At the Equator


Correct Option: D