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Frequently Asked Questions: Earth and Its Structure

What are the three main layers of the Earth?

The three main layers of the Earth are the Crust (outermost layer), Mantle (thick middle layer), and Core (innermost layer divided into outer liquid core and inner solid core).

What is plate tectonics theory?

Plate tectonics theory explains how the Earth's lithosphere is divided into tectonic plates that move and interact, causing earthquakes, volcanic activity, and mountain formation.

What are the three main types of rocks?

The three main types of rocks are Igneous, Sedimentary, and Metamorphic.

What causes earthquakes?

Earthquakes are primarily caused by the sudden release of energy along fault lines in the Earth's crust.

Which layer of the Earth is the thinnest?

The Earth's crust is the thinnest layer, ranging from 5–70 km thick depending on location.

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