22.1

Geologist
Study the earth and the processes that have shaped the earth overtime

Uniformitarianism
Idea that the processes that operates today also operated in the past

Crust
The rocky outer layer of earth

Geology
The study of earths composition and structure

People who study the earth and the processes that have shaped earth over time are called geologist
True

Earths major layers
Crust, Mantle, Core

Scientists divide earths interior into crust mantle and core and based on the
Materials that make up each layer

Much of earths crust is made up of
Silicates

Oceanic crust
7 kilometers thick
Mostly dense rock
Makes up ocean floor

Continental Crust
Less dense rock
40 kilometers thick
Make up continents

The layer of earth found directly below the crust
Mantle

Earths mantle
Thicker layer
Divided into layer based on properties of rock
Mainly silicates

The lithosphere includes the uppermost part of mantle and earths
Crust

Rock flows slowly in the asthenosphere
True

The stronger lower part of the mantle is called the
Core

Core
The sphere of metal inside earth is called the…..

The outer core of earth is liquid
True

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