Earth's Interior

By: Lia Graham

Features of the Mantle, Crust, and Core Pt. 1

The crust is the layer of solid rock which includes dry land and the ocean floor. The crust is very thin. In some places, the crust is around 5 and 40 kilometers thick. It is very thick under high mountains, where it can be 80 kilometers thick. The mantle is made up of very hot rock, but the rock is solid. The mantle is divided into layers based off of physical characteristics. The three layers are the lithosphere (the top layer), the asthenosphere

Features of the Mantle, Crust, and Core Pt. 2

(the middle layer), and the mesosphere (the bottom layer). The core is made mostly of metals iron and nickel. The core is based off of two parts. A liquid outer core and the solid inner core. The outer core is a layer of molten and the inner core is a dense ball of metal.

How geologists learn about the Earth's interior?

Geologists have two main types of ways to learn about the Earth's interior. The first way is to get direct evidence from rock samples. The second way is to get indirect evidence from seismic waves.

Vocab Words

.seismic waves- The waves that produce when earthquakes occur.

.pressure- results from a force pressing on an area.

.basalt- a dark, fine grained rock.

.granite- a rock that is usually a light color and has coarse grains.

.lithosphere- the uppermost part of the mantle.

.asthenosphere- The layer below the lithosphere.