atmosphere & climatology section 8 MCQ Questions & Answers Detailed Explanation

Answer: (d)

There is a negative relationship between rainfall and pressure. When the air pressure is lower, more rainfall occurs. When there is low pressure in the atmosphere, the air bubbles that are rising, are always hotter than the air around.

If the ground is heated then air will rise. The cool air will produce condensation that will ultimately lead to rainfall.

Answer: (b)

An anticyclone is a region of high atmospheric pressure relative to the surrounding air, generally thousands of kilometres in diameter and also known as a high or high-pressure system.

Anticyclones appear on weather charts as a series of concentric, widely spaced isobars of 1000 mbs and above. The roughly circular closed isobar at its central region indicates the area of highest pressure.

Answer: (a)

Answer: (b)

Answer: (c)

During the Rainy Season in India (Mid-June to the end of September), the intense heat that prevails in the Indian subcontinent causes a low-pressure region over the Northern Plains in the Northwestern parts of the country. It is intense enough to attract the moisture-bearing winds from the Indian Ocean.

Thus, the south-east trade winds from the Southern Hemisphere are attracted towards India. On crossing the equator, they are deflected to their right and blow over the Indian subcontinent as the south-west monsoon winds.

Answer: (d)

Hurricanes are unable to form along the equator because of the zero Coriolis Effect at 0 latitude, which is the force required for the spinning motion of these violent storms.

One of the necessary environmental conditions for an atmospheric disturbance to become a full-blown hurricane is for the rough weather conditions to occur at least 300 miles away from the equator.

The Coriolis Effect, which increases from the equator to pole is the apparent force that tends to move rotating objects to the right.