atmosphere & climatology section 3 MCQ Questions & Answers Detailed Explanation

Answer: (a)

Above Troposphere, temperature increases rapidly with height in the Stratosphere layer as it houses the ozone layer which absorbs ultraviolet (UV) rays from the sun.

Again, temperature increases rapidly with height in Thermosphere which comprises the Ionosphere (lower part) and Exosphere (upper part)).

The temperature in the Exosphere which is the uppermost layer of the atmosphere reaches up to more than 4500o Celsius.

Answer: (b)

In absorption of isolation the most significant part is played by Carbon dioxide.

Answer: (d)

The Roaring Forties is the name given to strong westerly winds found in the Southern Hemisphere, generally between the latitudes of 40 and 50 degrees.

The Westerlies play an important role in carrying the warm, equatorial waters and winds to the western coasts of continents, especially in the southern hemisphere because of its vast oceanic expanse.

Answer: (a)

Answer: (a)

Ionosphere is composed partly of electrons and positive ions. It is a region of Earth’s upper atmosphere, from about 60 km to 1,000 km altitude, that is ionized by solar radiation. This layer is also called thermosphere as its temperature rises with height.

Answer: (c)

“Chinook”, originally meant a warming wind from the ocean into the interior regions of the Pacific Northwest (the Chinook people lived near the ocean, along the lower Columbia River).

A strong Chinook can make snow one foot deep almost vanish in one day. The snow partly melts and partly evaporates in the dry wind. Chinook winds have been observed to raise winter temperature, often from below -20°C (-4°F) to as high as 10-20°C (50-68°F) for a few hours or days, then temperatures plummet to their base level.