Climate, Weather, and Geography

Precipitation refers to water products that fall from clouds to the ground. Hail, snowfall, and rainfall are all forms of precipitation. Fog, however, is a cloud at ground level consisting of suspended water droplets - it does not fall from the sky and therefore is not classified as precipitation.

Trade winds are steady winds that blow from the subtropical high-pressure belts (Horse Latitudes, approximately 30° N/S) toward the equatorial low-pressure zone (Doldrums, near the equator). In the Northern Hemisphere, the Coriolis effect deflects these winds to the right, causing them to blow from the northeast. Westerlies blow from the subtropics toward subpolar regions, not toward the equator.

A tornado is a violently rotating column of air that is in contact with both the surface of the Earth and a cumulonimbus cloud or in rare cases, the base of a cumulus cloud.

The presence of water vapour (humidity) in the air makes chips and biscuits moist.

Deserts are the places where air is dry with minimal water content and temperature is very high. So, the climate in deserts is hot and dry.

Migration is the phenomenon of movement of an organism from one place to another to escape harsh and cold conditions of that place and in search of food, mate or shelter.

If the amount of rainfall at a place is high, the climate of that place will be wet. This is the reason why the climate of North-East is wet.

This is the correct answer. The Coriolis force is caused by Earth's rotation and it is deemed responsible for deflecting winds towards the right in the Northern Hemisphere and towards the left in the Southern Hemisphere.

The taiga (boreal forest) biome is located between the Arctic tundra to the north and the temperate grasslands and deciduous forests to the south. This creates a natural transition zone in the northern hemisphere.

The doldrums refer to the Intertropical Convergence Zone (ITCZ) near the equator where trade winds from both hemispheres meet. This convergence creates a belt of low atmospheric pressure, rising warm air, frequent calms, and thunderstorms. The low pressure causes the characteristic lack of steady wind that sailors historically dreaded.

Chinook winds are warm, dry winds that descend the eastern slopes of the Rocky Mountains, causing rapid temperature rises. They form when moist air from the Pacific is forced upward, cools and precipitates on the windward side, then warms adiabatically as it descends the leeward side. Mistral affects France, nor'westers affect Bengal, and foehn is the general European term.

The Roaring Forties are strong westerly winds found between 40°S and 50°S latitudes in the Southern Hemisphere. They blow steadily from the northwest and are called 'anti-trade' because they flow opposite to the trade winds. These winds are particularly strong due to minimal land obstruction at these latitudes. The option D phrasing is awkward but correctly identifies them as steady northwest anti-trade winds in the Southern Hemisphere.

Anti-trade winds are the prevailing westerlies that blow from the subtropical high-pressure belts toward the subpolar low-pressure areas. They flow in the opposite direction to trade winds and occur between 30° and 60° latitudes in both hemispheres. Chinooks are local downslope winds, while typhoons and cyclones are tropical storm systems, not wind belts.

Trade winds blow from the Horse Latitudes (30°N/S) toward the Doldrums (equatorial region, 0°). In the northern hemisphere, these are the Northeast Trade Winds. They were named 'trade' because they were reliable for sailing ships carrying trade goods. Westesterlies blow in the opposite direction, polar easterlies are near the poles, and jet streams are high-altitude narrow currents.

The wind system in equatorial areas (0°-10° latitude) is known as the trade winds or simply 'trades'. These are the steady easterly winds that blow from the subtropical high-pressure belts toward the equatorial low-pressure zone. Westerlies are mid-latitude winds, doldrums are the calm equatorial zone itself, and monsoons are seasonal wind patterns.