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Composition and Structure of Atmosphere: Introduction Video Lecture | Geography Class 11 - Humanities/Arts

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01:04 Composition of the Atmosphere
02:18 Gases in the Atmosphere
04:14 Role of Water Vapour
07:48 Role of Dust Particles
10:10 Structure of the Atmosphere
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FAQs on Composition and Structure of Atmosphere: Introduction Video Lecture - Geography Class 11 - Humanities/Arts

1. What is the composition of Earth's atmosphere?
Ans. Earth's atmosphere is composed primarily of nitrogen (about 78%), oxygen (about 21%), and trace amounts of other gases such as carbon dioxide, argon, and water vapor.
2. How does the structure of the atmosphere change with altitude?
Ans. The atmosphere is divided into different layers based on temperature changes with altitude. These layers include the troposphere (closest to the Earth's surface), the stratosphere, the mesosphere, the thermosphere, and the exosphere.
3. What is the greenhouse effect and how does it relate to the atmosphere?
Ans. The greenhouse effect is the process by which certain gases in the atmosphere trap heat from the Sun and prevent it from escaping back into space. This natural process helps regulate the Earth's temperature and makes it suitable for life.
4. How does air pollution affect the composition and quality of the atmosphere?
Ans. Air pollution, caused by human activities, introduces harmful substances into the atmosphere, such as pollutants and greenhouse gases. This can alter the composition of the atmosphere, leading to air quality issues, climate change, and negative impacts on human and environmental health.
5. How does the ozone layer protect life on Earth?
Ans. The ozone layer, a region within the stratosphere, absorbs most of the Sun's harmful ultraviolet (UV) radiation. This protection is crucial as excessive exposure to UV radiation can cause skin cancer, cataracts, and damage to marine ecosystems.
71 videos|245 docs|44 tests
Video Timeline
Video Timeline
arrow
01:04 Composition of the Atmosphere
02:18 Gases in the Atmosphere
04:14 Role of Water Vapour
07:48 Role of Dust Particles
10:10 Structure of the Atmosphere
More
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