Atmosphere MCQ Question and Answer | Geography MCQ Question

With reference to the sub-tropical high pressure belt, consider the following statements:
1. It is affected by Earth's rotation and descent of winds from higher altitudes.
2. It is dynamically induced and characterized with anti-cyclonic conditions.
Which of the statement(s) given above is/are correct?

A) 1 only B) Both 1 and 2 C) 2 only D) Neither 1 nor 2

Discuss

Answer & Solution

Answer: Option C

Solution:

Sub-tropical high pressure belt is dynamically induced and characterized with anti-cyclonic conditions. This is why this zone is characterized by anticyclonic conditions which cause atmospheric stability and aridity. The convergence of winds at higher altitude above this zone results in the subsidence of air from higher altitudes. Thus, descent of winds results in the contraction of their volume and ultimately causes high pressure. This is one of the reasons for the presence of hot deserts of the world in the western parts of the continents in a zone extending between 25°-35° in both the hemispheres. This zone of high pressure is called ‘horse latitude’ because of prevalence of frequent calms.

Consider the following statements:
1. A hurricane acquires its spin from the Coriolis effect.
2. The diameter of the hurricane decreases as it moves away from low latitudes.
3. The diameter of a hurricane is never below 150 km.
Which of the statements given above is/are correct?

A) 1 only B) 2 and 3 only C) 1 and 3 only D) 1, 2 and 3

Discuss

Answer & Solution

Answer: Option C

Solution:

A hurricane acquires its spin from the Coriolis effect. When strong air currents (that result in hurricanes, etc.) move above the faster-moving equatorial regions, they get 'pulled' in the direction of Earth's spin, thus veering off from an otherwise straight path. The diameter of a hurricane is never below 150 km.

What is the name of the layer closest to the Earth?

A) Ionosphere B) Stratosphere C) Troposphere D) Exosphere

Discuss

Answer & Solution

Answer: Option C

Solution:

The troposphere is the lowest and closest layer of Earth's atmosphere. Most of the mass (about 75-80%) of the atmosphere is in the troposphere. Most types of clouds are found in the troposphere, and almost all weather occurs within this layer.

Which of the following constituents of the atmosphere are important from the climatic point of view ?
1. Nitrogen
2. Oxygen
3. Carbon dioxide

A) 1 and 2 B) 2 and 3 C) 1, 2 and 3 D) Only 3

Discuss

Answer & Solution

Answer: Option D

Solution:

A minor but very important component of the atmosphere, carbon dioxide is released through natural processes such as respiration and volcano eruptions and through human activities such as deforestation, land use changes, and burning fossil fuels. Humans have increased atmospheric CO2 concentration by more than a third since the Industrial Revolution began. This is the most important long-lived "forcing" of climate change.

The Sea breeze blows during ________

A) Day from land to sea B) Day from sea to land C) Night from land to sea D) Night from sea to land

Discuss

Answer & Solution

Answer: Option B

Solution:

During the day, the sun heats up both the ocean surface and the land. The wind will blow from the higher pressure over the water to lower pressure over the land causing the sea breeze. The sea breeze strength will vary depending on the temperature difference between the land and the ocean. At night, the roles reverse.