Class 9 Exam > Class 9 Videos > English Class 9 > Wind - Explanation : (English)
Wind - Explanation : (English) Video Lecture | English Class 9
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FAQs on Wind - Explanation : (English) Video Lecture - English Class 9
| 1. What is wind? |  |
Ans. Wind is the natural movement of air caused by the uneven heating of the Earth's surface by the sun. It is a form of weather phenomenon characterized by the flow of air molecules from areas of high pressure to areas of low pressure.
| 2. How is wind formed? | |
Ans. Wind is formed due to the uneven heating of the Earth's surface. The sun's radiation heats the Earth's surface, but it does not heat it evenly. This causes some areas to become warmer than others. As warm air rises, cooler air rushes in to fill the space, creating wind.
| 3. What are the factors that affect wind speed and direction? | |
Ans. Several factors affect wind speed and direction. Some of the main factors include the pressure gradient, the rotation of the Earth, friction, and the Coriolis effect. The pressure gradient determines the speed of the wind, while the rotation of the Earth and the Coriolis effect influence its direction. Friction, caused by the interaction of wind with various surfaces, also plays a role in modifying wind patterns.
| 4. How is wind measured? | |
Ans. Wind is measured using an instrument called an anemometer. An anemometer typically consists of cups that catch the wind and spin a rotor. The speed of the wind is then calculated based on the number of rotations per unit of time. Additionally, the direction of the wind is measured using a wind vane, which points in the direction from which the wind is blowing.
| 5. What are the different types of winds? | |
Ans. There are several types of winds, including prevailing winds, trade winds, westerlies, and polar easterlies. Prevailing winds are the dominant winds that blow consistently in a particular direction over a specific region. Trade winds are the winds that blow towards the equator from the north and south. Westerlies are the prevailing winds that blow from west to east in the middle latitudes, while polar easterlies blow from the polar regions towards the lower latitudes.
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Dec 24, 2024 Last updated |
Video Description: Wind - Explanation : (English) for Class 9 2024 is part of English Class 9 preparation.
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