Atmospheric pressure is the force exerted by air on the Earth’s surface. It is higher at sea level and decreases with altitude because there is less air above. As you climb mountains, pressure drops, making the air thinner and breathing more difficult.
Class 7 Social Science Chapter 2 Understanding the Weather question answer
Class 7 NCERT Social Science India and the World: Land and the People Chapter 2 Understanding the Weather
Atmospheric pressure is the weight of the air pushing down on the Earth’s surface. It is measured using a barometer and expressed in millibars. At sea level, pressure is about 1013 mb. As altitude increases, atmospheric pressure decreases because there is less air above. In mountainous regions, this drop in pressure reduces oxygen levels, making breathing harder. For example, pressure at high-altitude areas like Ladakh can be around 650 mb. This affects weather conditions and human activity.
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