how many crust to make our earth.
Answers
3 crust to make our earth....
Earth's crust is Earth's hard outer layer. It is less than 1% of Earth's volume. The crust is made up of different types of rocks: igneous, metamorphic, and sedimentary rocks.
Below the crust is the mantle. The upper part of the mantle is made up of peridotite, a rock denser than rocks common in the crust. The crust and the upper mantle make up the lithosphere. The lithosphere is broken up into tectonic plates that can move.
The crust is of two different types. One is the continental crust (under the land) and the other is the oceanic crust (under the ocean). The continental crust is thicker, and the oceanic crust is thinner. The thickness of the crust varies from 5 to 80 kilometres.
The temperature of the crust increases with depth because of geothermal energy. Where the crust meets the mantle the temperatures can be between 200 °C (392 °F) to 400 °C (752 °F).[1] The crust is the coldest layer because it is exposed to the atmosphere.
% by weight
Oxygen 46.6%
Silicon 27.7%
Aluminium 8.1%
Iron 5.0%
All others 12.6%
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