Atmosphere - Study Mode

[#176] The most abundant element in the Earth's atmosphere is
Correct Answer

(B) Nitrogen

Explanation

Solution: The most abundant element in the Earth's atmqsphere is Nitrogen. Nitrogen makes around 78.084% of total elements of earth.

[#177] A temperature inversion is most likely to occur under which of the following conditions?
Correct Answer

(D) Calm, clear and cool winter night

Explanation

Solution: Temperature inversions are a result of other weather conditions in an area. They occur most often when a warm, less dense air mass moves over a dense, cold air mass.

[#178] The final boundary between the Earth and the outer space is called
Correct Answer

(D) Magnetopause

Explanation

Solution: Magnetopause is a boundary line between Earth's magnetic field and solar wind. Solar winds forms the part of outer space whereas Earth's atmosphere exists up to magnetic field of Earth.

[#179] 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?
Correct Answer

(C) 2 only

Explanation

Solution: Sub-tropical high pressure belt is dynamically induced and characterized with anti-cyclonic conditions. This is why this zone is characterized by anticyclonic conxadditions which cause atmospheric stability and aridity. The converxadgence 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 hemixadspheres. This zone of high pressure is called ‘horse latitude’ because of prevalence of frequent calms.

[#180] 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?
Correct Answer

(C) 1 and 3 only

Explanation

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.