Geography
Describe the layers of the interior of the earth and their chemical composition.
Earth's Structure
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Answer
The layers of the interior of the earth are as follows:
Crust — It is the topmost layer of the earth. It is made up of rock with large content of silicates, feldspar, mica etc. It also contains silica and aluminium.
Mantle — It lies between the crust and core. It can be divided into upper and lower mantle. The upper mantle is solid while the lower mantle is partially molten. It is mainly composed of oxygen, silicon and magnesium.
Core — Core is the innermost inaccessible part of the earth. It is mainly composed of Nickel and Iron.
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Related Questions
Look at the figure on the side and answer the questions:
(i) Label the parts: (1), (2), (3), (4) and (5).
(ii) Name the state (solid, liquid or gas) in which each part exists.
(iii) Which part of the earth is suitable for human habitation? Why?State two chief characteristics of the earth's crust.
Give a geographical reason for each of the following:
(i) Temperature starts rising gradually towards the interior of the earth.
(ii) The asthenosphere is in a semi-molten state.
(iii) The inner core of the earth is in a solid state.There are two transitional zones between the two consecutive layers of the interior of the earth. Name them and state their chief characteristics.