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Structure Of The Atmosphere Video Lecture | Geography for Class 7
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FAQs on Structure Of The Atmosphere Video Lecture - Geography for Class 7
| 1. What is the structure of the atmosphere? |  |
| 2. How does the temperature vary in the atmosphere's layers? | |
Ans. The temperature varies in each layer of the atmosphere. In the troposphere, the temperature generally decreases with increasing altitude. In the stratosphere, the temperature remains relatively constant or slightly increases with altitude. The mesosphere experiences a decrease in temperature again, while the thermosphere has increasing temperatures due to the absorption of high-energy solar radiation.
| 3. What is the role of the ozone layer in the atmosphere? | |
Ans. The ozone layer, located in the stratosphere, plays a crucial role in protecting life on Earth. It absorbs most of the Sun's ultraviolet (UV) radiation, preventing it from reaching the Earth's surface. This absorption helps to protect us from harmful effects such as skin cancer, cataracts, and damage to marine ecosystems.
| 4. How does the composition of the atmosphere change with altitude? | |
Ans. The composition of the atmosphere changes with altitude. In the lower layers, such as the troposphere and stratosphere, the atmosphere is mainly composed of nitrogen, oxygen, and trace amounts of other gases. As we move higher into the mesosphere and thermosphere, the density of gases decreases, and there are more atoms and molecules of lighter gases such as helium and hydrogen.
| 5. How does the atmosphere contribute to Earth's climate? | |
Ans. The atmosphere plays a crucial role in Earth's climate. It acts as a protective blanket, trapping heat from the Sun and preventing it from escaping too quickly into space. The greenhouse effect, caused by certain gases in the atmosphere, helps to maintain a stable temperature range on Earth. Without the atmosphere, the Earth would be much colder and unable to support life as we know it.
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