Eexplain the three layer of the earth with the help of suitable example
Answers
Answer:
The Earth is divided into three concentric layers - crust, mantle and core
Explanation:
Crust
The crust is the outermost layer of the Earth's surface.
The thickness of the crust varies from 5-8 km beneath the oceans and to an average of 35 km under the continental landmass.
The main elements that make up the crust are silicon(Si), aluminium (Al) and magnesium (Mg).
The main components of the continental landmass are silicon and aluminium. Thus, it is called sial.
The oceanic crust is called sima as it is made up of silicon and magnesium.
The density of the crust is less than 3 g/cc. The oceanic crust is denser than the continental crust.
Mantle
The layer below the crust is called the mantle. The mantel is 2,900 km thick.
It is mostly made up of silicon (Si), iron (Fe) and magnesium (Mg).
It's density varies between 3.5 and 5.5 g/cc.
The mantle consists of two layers - The upper mantle and the lower mantle.
The average temperature of the upper mantle is 870©, while the lower mantle has an average temperature of 2,200©.
The mantle is in a semi-solid, plastic state.
Core
The innermost layer of the Earth is called the core.
It's thickness is about 3,500 km.
It is made up of nickel (Ni) and iron (Fe) and hence is known as nife.
It's density is about 11 g/cc. The core is divided into the outer core and the inner core.
The outer core has a temperature of 3700© and is in a molten state.
The inner core has a temperature of about 5000© bit still is in a solid state. This is because of the extreme pressure exerted by the weight of the rocks that lie above it.
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=> The earth is made up of three different layers: the crust, the mantle and the core. This is the outside layer of the earth and is made of solid rock, mostly basalt and granite. There are two types of crust; oceanic and continental. ... Continental crust is less dense, thicker, and mainly composed of granite.