Atmosphere - Study Mode

[#126] What is the percentage of Nitrogen in atmosphere of the Earth?
Correct Answer

(C) 78.03

Explanation

Solution: Nitrogen is the most abundant gas in the atmosphere. Air is composed of 78.03% nitrogen.

[#127] At low elevation which among the following clouds are to be found ?
Correct Answer

(B) Nimbus

Explanation

Solution: Nimbostratus clouds typically form at the ground level up to an altitude of about 6,000 feet in the sky. Clouds occurring at ground level are what scientists call fog.

[#128] The jet aircrafts fly very easily and smoothly in the lower stratosphere. What could be the appropriate explanation? 1. There are no clouds or water vapour in the lower stratosphere. 2. There are no vertical winds in the lower stratosphere. Which of the statements given above is/are correct in this context?
Correct Answer

(C) Both 1 and 2

Explanation

Solution: The jet aircrafts fly very easily and smoothly in the lower stratosphere because There are no clouds or water vapour in the lower stratosphere and There are no vertical winds in the lower stratosphere.

[#129] The most important factor in thunderstorms development is ________
Correct Answer

(B) Atmospheric instability

Explanation

Solution: Atmospheric instability is the most important factor in thunderstorm development. Surface heating brings about an element of instability in the warm and moist air lying close to the surface. That is why warm and moist air becomes unstable in spring and summer when it is heated from below. Air mass thunderstorms develop in this way.

[#130] What do you understand by the term 'Advection' ?
Correct Answer

(B) Heat is transferred horizontally by both winds and ocean currents

Explanation

Solution: Advection is the horizontal transport or transfer of a quality such as heat and cold from one point to another. Advective transfers occur either in the oceans by currents of seawater or by large-scale movement in the atmosphere where humidity (atmospheric moisture) is another important property. In both cases a major example is the transport of cold air or water masses from the polar regions to lower latitudes.