Wind, Storms and Cyclones Class 7 CBSE Revision Notes
Here, we shall study wind storms and cyclones class 7 notes. Air is everywhere around us but we cannot see it. Yet, we can feel its presence. It is sometimes pleasurable in the form of cool soothing breeze. Sometimes, it is absolutely in the form of destruction like strong winds, storms, and cyclones, etc. resulting in massive destruction of property and life. Here in this chapter, we will know about some activities involving air, including winds, storms, and cyclones. We will also know about what are they, how they form, their destructive capacity and the effective safety measures against them. Thus, wind storms and cyclones class 7 notes will come in handy.
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Subtopics covered under Winds, Storms, and Cyclones:
- Air Exerts Pressure: Air is made up of molecules of different gases that are constantly colliding with each other and due to this collision its exerts pressure. The more the collision more is the pressure.
- Air Expands on Heating: As we know that air is made up of different particles that have spaces between them, so when the heat is applied to the air it expands to allow more space between the particles. Hence we can say that air expands on heating.
- Thunderstorms and Cyclones: Thunderstorms are the violent storms that are accompanied by lightning, thunder, dense clouds, heavy rain or hail, and strong gusty air. The large and strong rotating air mass encircling a low atmospheric pressure is a cyclone.
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