Write a short note on structure of the earth and its composition
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Our Universe is very huge . It is made up of many many heavenly bodies like star , meteoroids, asteroids, planets etc .
Our earth is also one of them . Earth is in the Milky way galaxy . It is the only planet where life exists . Here found the atmosphere and water which are the two basic needs for survival of life.
Our earth is on 5 th rank according to size.
It's atmosphere is having 5 layers .
Our earth is spherical in size. It is commonly known as blue planet Because when we go above , we will found that it looks blue .
Our earth is covered by water and land .
It because when the earth was formed in starting it was a very big ball of volcanoes and when the reaction take place it rained for millions of years and the water got collected. The part of earth which got submerged is now sea and the above relief features are now the mountains. But in the sky it looks blue.
Earth is having a great variety of flaura and fauna . About 17-18 million of variety of flaura and fauna is on earth .
Our earth revolves around the sun . It complete one Revolution in 365¼ days .
It also rotate on its axis in 24 hours .
The rotation of earth is responsible for the day and night while the Revolution of earth is responsible for the seasonal changes in earth.
The earth is very beautiful. The really very much helpful for all of us . Today we are leaving a very comfortable life on earth all because of it .
We are having a very great loan of mother earth. We can't repay that loan .
Our earth is also one of them . Earth is in the Milky way galaxy . It is the only planet where life exists . Here found the atmosphere and water which are the two basic needs for survival of life.
Our earth is on 5 th rank according to size.
It's atmosphere is having 5 layers .
Our earth is spherical in size. It is commonly known as blue planet Because when we go above , we will found that it looks blue .
Our earth is covered by water and land .
It because when the earth was formed in starting it was a very big ball of volcanoes and when the reaction take place it rained for millions of years and the water got collected. The part of earth which got submerged is now sea and the above relief features are now the mountains. But in the sky it looks blue.
Earth is having a great variety of flaura and fauna . About 17-18 million of variety of flaura and fauna is on earth .
Our earth revolves around the sun . It complete one Revolution in 365¼ days .
It also rotate on its axis in 24 hours .
The rotation of earth is responsible for the day and night while the Revolution of earth is responsible for the seasonal changes in earth.
The earth is very beautiful. The really very much helpful for all of us . Today we are leaving a very comfortable life on earth all because of it .
We are having a very great loan of mother earth. We can't repay that loan .
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The shape of earth is elliptical or oblate spheroid. Its structure is divided into layers . These layers are both physically and chemically different. The Earth is made up of following layers :
1) outer solid layer called crust
2)a highly viscous layer called mantle
3) a liquid layer called core
- CRUST: the crust is outermost layer of Earth . It is made of solid rocks .Its mostly made of lighter elements silicon , oxygen , aluminium and hence it is called sial or felsic. It is 133 km thick
- MANTLE : It is the layer right below the crust . It is mostly made of silicon , oxygen and the heavier element magnesium and is called sima
- CORE : The Earth's core is made of solid iron and nickel ans is about 5000-6000°C
1) outer core : it is the liquid below mantle
2) inner core : it is the centre of earth and very hot . Due to high pressure it is called knife core
I HOPE IT HELPS......
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