atmosphere & climatology section 4 Practice Questions Answers Test with Solutions & More Shortcuts

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)

A continually rising air pressure is an indication of fine and settled weather, and a steadily falling tendency in the barometer foretells the advent of unsettled and cloudy weather.

Answer: (c)

Summer experience lower Air pressure.

Answer: (d)

The amount of solar energy reaching the Earth is 70 per cent. The surface of the Earth absorbs 51 per cent of the insolation. Water vapour and dust account for 16 per cent of the energy absorbed.

Most of the terrestrial radiation is absorbed by the water vapour in the atmosphere and some by other gases (about 8 per cent is radiated directly to outer space). This radiant energy is re-radiated in the atmosphere horizontally and vertically.