atmosphere & climatology section 4 MCQ Questions & Answers Detailed Explanation

Answer: (b)

Cyclones are moving bodies of air in an enclosed area rotating in the same direction as the earth. The air inside the cyclone moves anticlockwise in the Northern Hemisphere.

Answer: (a)

The troposphere, which extends up to a height of 12 km on average from the surface of the earth, is the locale of all the vital atmospheric processes which create the climatic and weather conditions on the earth’s surface.

About half of the mass of air comprising the entire atmosphere is concentrated in this zone. This is the lowermost layer of the atmosphere.

Answer: (b)

Answer: (a)

The idea is to optimize fuel burn reason is the low air density that reduces parasitic drag on the airframe. It also allows them to stay above any hard weather (extreme turbulence).

Airflow in the stratosphere is much lesser turbulent than in the troposphere and this is the reason that jet aircraft like to cruise at stratospheric altitudes for, the flight is less “bumpy.” So statement 2 is correct. The majority of clouds form in the Earth’s troposphere, but there are occasions where clouds in the stratosphere and mesosphere are formed and have been observed.

Statement 1 which says that there are no clouds or water vapour in the lower stratosphere, is not a correct statement, to the extent that it does not explain the flight of jets in the lower stratosphere.

Answer: (d)

Frontal rainfall is a type of precipitation that occurs when a warm air mass and a cold air mass meet. Extra-tropical cyclones form as waves along weather fronts before occluding later in their life cycle as cold-core cyclones.

Cyclogenesis is the development or strengthening of cyclonic circulation in the atmosphere (a low-pressure area).

Answer: (d)

The meaning of the word ‘tundra’ is ‘a region in continents of Asia, Europe and North America, where the growth of trees is prevented due to low temperatures and permanently frozen subsoil’.

These kinds of geographic areas are found near the North Pole and the South Pole. In physical geography, the tundra is a biome where tree growth is hindered by low temperatures and short growing seasons.

There are three types of tundra: Arctic tundra, alpine tundra, and Antarctic tundra. In the tundra, the vegetation is composed of dwarf shrubs, sedges and grasses, mosses, and lichens. Scattered trees grow in some tundra.