discuss of interiar structure of the earth with help of suitable diagram
Answers
Answer:
The structure of the Earth is divided into layers. These layers are both physically and chemically different. The Earth has an outer solid layer called the crust, a highly viscouslayer called the mantle, a liquid layer that is the outer part of the core, called the outer core, and a solid center called the inner core.
Answer:
The earth is composed of three layers, viz. crust, mantle and core. Boundaries of these layers have been determined on the basis of chemical composition and physical properties.
Crust: The outermost layer of the earth is a solid layer and is called crust. The thickness of the crust is not uniform at every place. Due to this, we get to see mountains and oceans at different places. The crust can be divided into two types, viz. lithosphere and hydrosphere. The atmosphere is usually considered as a part of the lithosphere. Most of the lithosphere is composed of soil. The portion of lithosphere, hydrosphere and atmosphere where living beings are found is called biosphere.
Mantle: The second layer of earth is called mantle. This is the thickest layer and most of it is composed of hot and molten rocks. These are silicate rocks and have iron and magnesium in greater quantity than in the crust. Bubbles keep on appearing in this layer the way bubbles form in boiling water. Mantle keeps on vibrate in the middle portion of the earth.
Core: The innermost portion of the earth is called core. This is hottest due to being at the centre. The temperature of the core is about 7000 degree. The heat trapped during formation of earth is the cause of high temperature of core. The core is divided into two parts, viz. outer core and inner core. The outer core is in liquid form and is mainly composed of iron and nickel. The inner core is in solid form is mainly composed of iron.
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