Question

How crust is formed?

Answer 1

Answer:

Earth's crust is made up of different types of rocks: igneous, metamorphic and sedimentary rocks. It is the outer hard layer, which is less than 1% of Earth's volume. It is said to be approximately 40 kilometers (25 miles) thick, making it the thinnest of the three layers: crust, mantle and core. The mantle below the crust is made of semi-solid magma and solid rocks and minerals. An extremely hot, metal core exists at the center of the Earth. The crust and the upper mantle make up the lithosphere, which is broken up into 15 movable tectonic plates.

Explanation:

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