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