atmosphere & climatology section 4 MCQ Questions & Answers Detailed Explanation

Answer: (a)

Answer: (c)

The Ionosphere makes the radio communications possible by virtue to the fact this layer reflects the radio singnals back to the earth.

Answer: (b)

Jet streams are fast flowing, narrow, meandering air currents found in the atmosphere of some planets, including Earth.

On Earth, the main jet streams are located near the altitude of the tropopause and are westerly winds (flowing west to east).

Their paths typically have a meandering shape. Jet streams may start, stop, split into two or more parts, combine into one stream, or flow in various directions including opposite to the direction of the remainder of the jet.

The strongest jet streams are the polar jets, at 9–12 km (30,000–39,000 ft) above sea level, and the higher altitude and somewhat weaker subtropical jets at 10–16 km (33,000–52,000 ft).

Answer: (d)

Answer: (b)

As air moves from high to low pressure in the Northern hemisphere, it is deflected to the right. In the Southern hemisphere, air moves from high to low pressure and deflected to the left due to Coriolis force.

The Earth’s rotation (West to East) deflects the direction of the wind to the right in the Northern hemisphere and to the left in the Southern hemisphere.

Answer: (d)

The atmosphere is made up of gasses. Gasses are physical substances, and all physical substance has weight.

The atmosphere is 25 miles thick, and that 25 miles thick layer of gasses presses down on earth with a weight of 15 lbs. per square inch because of the gravitational pull. That’s how the atmosphere exerts pressure on the earth.