Class 7th Science NCERT Chapter 8
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Important Topics to Study from the Chapter "Winds, Storms and Cyclones":
1. Air Exerts Pressure:
– Summary: Air exerts pressure, as shown through activities involving heating and the effects on a tin can or plastic bottle.
2. High Speed Winds are Accompanied by Reduced Air Pressure:
– Summary: Increased wind speed is associated with reduced air pressure, demonstrated through activities like blowing into bottles and balloons.
3. Air Expands on Heating:
– Summary: Heating causes air to expand, as demonstrated by activities involving a boiling tube with a balloon and the concept of warm air rising.
These topics cover fundamental aspects of winds, storms, and cyclones, including the pressure of air, the relationship between wind speed and air pressure, and the expansion of air when heated.
What is the moving air called?
Can you explain why the shape of a can (or bottle) gets distorted when water is poured over it?
Why is it difficult to force a paper ball into a bottle when blowing on it?
What happens when high-speed winds blow over the roofs of buildings and the roofs are weak?
What does the observation from Activity 8.6 using paper bags and a candle indicate about warm air?
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