The atmosphere is the layer of gases surrounding Earth, made up mostly of nitrogen and oxygen. It protects life, provides air and regulates temperature. The lowest layer, the troposphere, contains weather phenomena. It supports breathing and life for plants, animals and humans.
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
The atmosphere is a blanket of gases surrounding Earth, composed mainly of nitrogen and oxygen. It plays a vital role in sustaining life by providing oxygen, regulating temperature and shielding Earth from harmful solar radiation. The lowest layer, called the troposphere, is where all weather events occur and where we live and breathe. The atmosphere helps maintain Earth’s temperature, allows cloud formation and enables rain, snow and winds—making it essential for life on Earth.
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