Scientists believe that the Earth's outer crust is made up of about huge fragments, called tectonic plates, that fit together like a cracked eggshell.

From mud and clay to diamonds and coal, Earth's crust is composed of igneous, metamorphic, and sedimentary rocks. The most abundant rocks in the crust are igneous, which are formed by the cooling of magma. Earth's crust is rich in igneous rocks such as granite and basalt.

Together, the crust and the upper part of the mantle form the lithosphere, Earth's solid outer shell. This rocky, brittle layer is broken up into seven major and several minor tectonic plates (also known as lithospheric plates) that fit together like puzzle pieces.

He hypothesized that all of the modern-day continents had previously been clumped together in a supercontinent he called Pangaea (from ancient Greek, meaning “all lands” or “all the Earth”). Over millions of years, Wegener suggested, the continents had drifted apart.

Earth > Power of Plate Tectonics > Pangaea This gigantic continent, called Pangaea , slowly broke apart and spread out to form the continents we know today. All Earth's continents were once combined in one supercontinent, Pangaea. Over millions of years, the continents drifted apart.

The earth's crust is made of solid rock. What's underneath the Earth's crust? Melted Rock / Molten Rock • We know this because there are volcanoes.

Answer and Explanation: Another name for the Earth's crust is the outer shell. It is called the outer shell because it wraps around the other layers as the external part. The Earth's crust is also called the surface of the Earth.