Earth's Layers and Composition January 25

Front

outside, thinnest layer of the earth. This is exactly where we live.

Back

crust

Front

The largest layer making up 84% of the Earth's total volume. This layer is about 5,200 kilometers thick and is made up of hot, dense, iron and magnesium-rich solid rock

Back

mantle

Front

The ______ core is made up of liquid iron and nickel, and is about 2,300 kilometers thick. It is responsible for Earth's magnetic field

Back

outer

Front

The _________ _______ is the ball-shaped centermost layer of the Earth. The layer is made up of solid iron and nickel and these make it the densest layer of the earth's interior.

Back

inner core

Front

This is the layer where most earthquakes happen. This layer is light and brittle, made up of granite and diorite.

Back

continental crust

Front

This crust is thinner than the continental crust and is covered by seas and oceans.

Back

oceanic crust

Front

_________ are long and narrow depressions on the seafloor that form where ocean plates push or subducts beneath the continental plates.

Back

trench

Front

__________ are huge chains of mountains circling the ocean floor formed by volcanic eruptions.

Back

ridge

Front

the __________ is the brittle crust and the top part of the upper mantle making up the coolest and the most rigid part of the Earth

Back

lithosphere

Front

The _________ is found below the lithosphere and is a soft and fluid layer. This layer is believed to play an important role in the movement of the Earth's tectonic plates.

Back

Asthenosphere