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प्रश्न
Write briefly about the layers of the atmosphere
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उत्तर
The atmosphere is divided into five layers starting from the Earth’s surface:
- Troposphere — Its average height is 13 km. The air we breathe exists here. Almost all the weather phenomena like rainfall, fog and hailstorm occur in this layer.
- Stratosphere — It lies above the troposphere which extends up to a height of 50 km. This layer is almost free from clouds and associated weather phenomenon, making conditions most ideal for flying aeroplanes. It contains a layer of ozone gas.
- Mesosphere — It lies above the stratosphere. It extends up to the height of 80 km. Meteorites bum up in this layer on entering from the space.
- Thermosphere — In thermosphere, temperature rises very rapidly with increasing height. Ionosphere is a part of this layer. It extends between 80-400 km. This layer helps in radio transmission. In fact, radio waves transmitted from the Earth are reflected back to the Earth by this layer.
- Exosphere — This upper most layer. This layer has very thin air. Light gases like helium and hydrogen float into the space from here.
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संबंधित प्रश्न
Set up an experiment to measure gain and loss of heat by water, sand and air.
Choose the correct answer.
The rate at which the temperature drops in the troposphere is called
State whether the following is true or false.
The earth’s atmosphere contains 99 per cent oxygen, which is essential for life.
Fill in the blank:
The layer of the atmosphere where ozone is found is called the ________.
Fill in the blank:
The ozone layer protects us from the _____________ of the sun.
State whether the following is true or false.
The stratosphere extends from the top of the troposphere up to 80 km above the surface of the earth.
Write True or False.
CFCs and BFCs protect the ozone layer.
What is responsible for causing a hole in the ozone layer?
Name different layers of atmosphere. Describe the important characteristics of each layer.
Tick the correct answer
The most important layer of the atmosphere is
Short Answer Type Question:
Give an account of the composition of the atmosphere. Also, discuss the importance of the components.
Mountaineers carry oxygen in cylinders when they climb mountains that are more than 5000 m high. What could be the reason for that?
__________ is used to measure pressure in the air.
What is Biosphere?
There is cut-off signal when NASA rocket reaches in the region of ______.
Give Reason:
Exosphere is characterised by aurora Australis and aurora borealis.
______ layer contain ozone layer.
Highly reactive gas was later names ‘oxygen’ by ______.
Exosphere has a high temperature.
Why do aircraft usually fly above the troposphere layer?
