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प्रश्न
Draw a suitable diagram for the structure of the atmosphere and label it and describe it.
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उत्तर
The atmosphere consists of different layers with varying density and temperature. Density is highest near the surface of the earth and decreases with increasing altitude. The atmosphere is divided into five different layers depending upon the temperature condition.
They are troposphere, stratosphere, mesosphere, thermosphere, and exosphere.
Structure of atmosphere
1. Troposphere: The troposphere is the lowermost layer of the atmosphere. Its average height is 13 km and extends roughly to a height of 8 km near the poles and about 18 km at the equator. The thickness of the troposphere is greatest at the equator because heat is transported to great heights by strong convectional currents. This layer contains dust particles and water vapour. All changes in climate and weather take place in this layer. The temperature in this layer decreases at the rate of 1°C for every 165 m of height.
2. Stratosphere: The stratosphere is found above the tropopause and extends up to a height of 50 km. One important feature of the stratosphere is that it contains the ozone layer. This layer absorbs ultra-violet radiation and shields life on the earth from an intense, harmful form of energy.
3. Mesosphere: The mesosphere lies above the stratosphere, which extends up to a height of 80 km. In this layer, the temperature starts decreasing with the increase in altitude and reaches up to minus 100°C at the height of 80 km.
4. Ionosphere: The ionosphere is located between 80 and 400 km above the mesopause. It contains electrically charged particles known as ions, and hence, it is known as the ionosphere. Radio waves transmitted from the earth are reflected back to the earth by this layer. Temperature here starts increasing with height.
5. Exosphere: The uppermost layer of the atmosphere above the thermosphere is known as the exosphere. This is the highest layer but very little is known about it.
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संबंधित प्रश्न
How is our atmosphere different from the atmospheres on Venus and Mars?
How does the atmosphere act as a blanket?
We often leave the lights switched on and fans running when we are not in the room. We switch on the air-conditioning even though we don’t really need it. We insist on being dropped to school in the car every day. Thus, we waste valuable energy which is generally produced by burning coal and petroleum. As you know, the burning of these fuels release gases that pollute the atmosphere.
Make a list of the similar things that we do without realizing that we are destroying the environment. Think of the ways that we can behave differently.
Match the following.
| A | B | ||
| 1. | Troposphere | (i) | Ozone |
| 2. | Stratosphere | (ii) | Ions |
| 3. | Thermosphere | (iii) | Outer Space |
| 4. | Exosphere | (iv) | Lowest Temperature |
| 5. | Mesosphere | (v) | Densest Layer of atmosphere |
Choose the correct answer.
21 per cent of the atmosphere is composed of
Choose the correct answer.
This layer of the atmosphere has the lowest temperature.
State whether the following is true or false.
The stratosphere is the lowest layer of the atmosphere.
What is the troposphere?
What is the difference between the troposphere and the tropopause?
Write briefly about the layers of the atmosphere
State any three characteristics of the mesosphere.
Imagine that you are an active member of Greenpeace. Write a two-page appeal addressed to the Prime Minister of India stating why you think that increasing the number of vehicles on roads will be disastrous to the nation in the long run.
What is known as troposphere?
In which layer of atmosphere do all weather conditions occur?
Name different layers of atmosphere. Describe the important characteristics of each layer.
Answer the following question briefly:
Name the different layers of atmosphere.
Tick the correct answer:
The major constituent of atmosphere by percent is ____________
Short Answer Type Question:
What is the atmosphere? Write about its different layers.
The study of weather is called ___________.
All weather changes occur in the Troposphere.
Height of mesosphere which lies after troposphere is
What is atmosphere?
The part of atmosphere which is consisted of variable gases with uneven composition is called ______.
What is Magnetosphere?
What are the elements of weather and climate?
______ is the lowest layer of the atmosphere.
What is mesosphere?
Where does Ozone layer lie?
The two forms of oxygen found in the atmosphere are
