Atmosphere & Weather — Set 2
Geography · वायुमंडल और मौसम · Questions 11–20 of 60
In the Northern Hemisphere, the Coriolis force deflects winds in which direction?
Correct Answer: C. To the Right
The Coriolis force deflects moving objects, including winds, to the right in the Northern Hemisphere. In the Southern Hemisphere, it deflects them to the left. This force is caused by the rotation of the Earth.
Which planetary winds blow from the Subtropical High Pressure belts towards the Subpolar Low Pressure belts?
Correct Answer: B. Westerlies
Westerlies blow from the Subtropical Highs towards the Subpolar Lows. They blow from the south-west in the Northern Hemisphere and north-west in the Southern Hemisphere. They are responsible for much of the weather movement in temperate regions.
Land Breeze generally occurs during which time of the day?
Correct Answer: A. Night
Land Breeze occurs during the night. At night, the land cools down faster than the sea, creating high pressure over land. The wind then blows from the high-pressure land to the lower-pressure sea.
Which type of local wind is 'Chinook', often observed in the Rockies?
Correct Answer: C. Warm and Dry
Chinook is a warm and dry local wind. It flows down the eastern slopes of the Rocky Mountains in North America. It is nicknamed the 'Snow Eater' because it melts snow rapidly.
The capacity of air to hold moisture increases with an increase in?
Correct Answer: B. Temperature
The capacity of air to hold moisture is directly related to its temperature. Warmer air can hold more water vapor than colder air. This is why cooling warm, moist air often leads to condensation.
What is the temperature at which air becomes fully saturated with water vapor called?
Correct Answer: B. Dew Point
The Dew Point is the temperature at which air becomes saturated (100% relative humidity). Below this temperature, water vapor begins to condense into liquid water. It indicates the moisture content of the air.
Which type of cloud creates a 'halo' around the sun or moon?
Correct Answer: A. Cirrostratus
Cirrostratus clouds are thin, transparent, high-altitude clouds. They are composed of ice crystals that refract light to form a halo. The presence of a halo often indicates approaching moisture.
Which clouds are dark, shapeless, and associated with continuous rain?
Correct Answer: D. Nimbostratus
Nimbostratus clouds are thick, dark, and shapeless layers. They are known as 'rain clouds' because they produce continuous precipitation. They block out the sun completely.
Rainfall caused by the rising of air due to heating is known as?
Correct Answer: B. Convectional Rainfall
Convectional Rainfall occurs when the ground heats the air above it, causing it to rise, cool, and condense. It is common in equatorial regions. It is often accompanied by thunder and lightning.
In Orographic rainfall, the side of the mountain that receives less rain is called?
Correct Answer: C. Leeward side
The Leeward side, or the rain shadow area, receives less rain. This is because the air descends, warms up, and loses its moisture on the Windward side. The Windward side faces the incoming moist wind.