The Earth's Crust

Earth's Layers

• The crust is the thinnest layer of the Earth.

Crust Types

• Continental crust is thicker, older, and lighter than oceanic crust.

Subduction Zones

• In subduction zones, oceanic crust is forced beneath other crust, a process known as subduction.

Continental Crust

• The main components of the continental crust are various rocks, including granite and sedimentary rocks.
• The average thickness of the continental crust is approximately 30-50 km.
• The continental crust is primarily composed of quartz, feldspar, and other minerals.

Oceanic Crust Formation

• Oceanic crust is primarily formed at mid-ocean ridges, where magma rises and solidifies.

Oceanic Crust Destruction

• Oceanic crust is primarily destroyed and recreated through the process of subduction and seafloor spreading.

Continental Crust Formation

• Continental crust is primarily formed through the process of continental growth, where new crust is added through plate tectonics.

Test your knowledge about the Earth's crust and its composition with this informative quiz. Explore topics such as the thickness of the crust, landforms, rocks, and soil, and learn about the differences between continental and oceanic crust. Challenge yourself and discover fascinating facts about the outermost layer of our planet!