Question

Answer it , correct answer needed. ​

Answer 1

Question:-

• Write the characteristics features of stratosphere and thermosphere.

Answer:-

$\sf\purple{Characteristics \ features \ of \ stratosphere:-}$

• The boundary between the Troposphere and stratosphere is known as tropopause.

• The estimated height of the stratosphere is 50km above the surface of the earth.

• No clouds are seen in the stratosphere. Dust particles and water vapour are also negligible.

• The stratosphere contains ozone which absorbs the harmful ultraviolet radiation of the sun.

• The uppermost layer of the stratosphere is called as stratopause .

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$\sf\purple{Characteristics \ features \ of \ thermosphere:-}$

• The thermosphere lies above the mesosphere. It extends up to a height of 400km above the sea level.

• In this layer, the temperature begins to increase rapidly with increase in altitude. It reaches more than 1,500°C.

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Question:-

• Draw a flow chart on the major landforms.

Answer:-

• Refer to the attachment. [First attachment]

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Question:-

• What are the four domains of the earth?

Answer:-

• There are four domains of the earth :-

1. Lithosphere
2. Hydrosphere
3. Atmosphere
4. Biosphere

$\sf\purple{Lithosphere:-}$

• It consists of rocks and minerals which are useful to us.

• It provides land for building houses, roads, factories and soil for Agriculture.

$\sf\purple{Hydrosphere:-}$

• It supports all forms of life on earth.

• It provides us with food and minerals.

$\sf\purple{Atmosphere:-}$

• Nitrogen is essential to maintain the fertility of soil.

• Oxygen is necessary for the survival of human beings.

$\sf\purple{Biosphere:-}$

• The narrow zone where the lithosphere, hydrosphere and atmosphere meet and interact is called as biosphere.

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Question:-

• Explain the layers of the Earth with the help of a diagram.

Answer:-

• There are three layers of the earth :-

1. Crust
2. Mantle
3. Core

$\sf\orange{Crust:-}$

• The crust is the topmost layer of the earth.

• It is also called as lithosphere.

• It is the thinnest layer of the earth. The upper part of the crust is called as continental Crust [average thickness 35km] and the lower is called as oceanic crust [ average thickness 5km]

$\sf\orange{Mantle:-}$

• The mantle is the middle layer of the earth.

• It is also called as mesosphere.

• It lies just below the crust, it is 2,900km thick.

$\sf\orange{Core:-}$

• The core is innermost layer and lies at the center of the earth.

• It is also called as barysphere.

• The average thickness of the core is about 3,500 km.

Diagram:-

• Check the second attachment for the diagram of " layers of the earth".

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