Q1
What is air pressure?
AThe weight of the atmosphere pressing down
BThe speed of wind
CThe temperature of air
DThe colour of the sky
SSCClass 7 (SSC)Geography (भूगोल)Ch 4 · Topic 2
Practice and Revision - Air Pressure
Let us practise and revise what we learned about air pressure. Air pressure is the weight of air pressing down on Earth's surface, and under
Core concept
Air pressure is caused by the weight of the atmosphere pressing down on Earth's surface, measured using a barometer.
How it works
Air pressure decreases with altitude, which is why mountain climbers experience lower pressure and thinner air at high elevations.
Why it matters
High pressure areas are usually associated with clear, calm weather, while low pressure areas are often linked to clouds and storms.
Key detail
Understanding air pressure differences helps meteorologists predict weather changes and explains why wind moves in certain directions.
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Quick notes
• Air pressure: weight of atmosphere pressing down.
• Measured using a barometer.
• Pressure decreases with altitude.
• Mountains have lower pressure, thinner air.
• High pressure: clear, calm weather.
• Low pressure: clouds, storms.
• Pressure differences explain wind direction.
• Meteorologists use this to predict weather.