Earth’s Interior
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Earth’s Interior. C hapter 1 Section 1. Guide for Reading. What does a Geologist do?. What are the characteristics of Earth’s crust , mantle , and core ?. The Science of Geology. Geology is the study of planet Earth.

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Earth’s Interior

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Earth s interior

Earth’s Interior

Chapter 1 Section 1


Earth s interior

Guide for Reading

What does a Geologist do?

What are the characteristics of Earth’s crust, mantle, and core?


Earth s interior

The Science of Geology

Geologyis the study of planet Earth.

Geologists are scientists who study the processes that create Earth’s features and search for clues about Earth’s history.


Earth s interior

Surface Changes

Forces are constantly changing the surface of the Earth

Earth looks different today than it did millions of years ago.


Earth s interior

Constructive forces shape the surface by building up mountains and landmasses

Constructive forces = Build up


Earth s interior

Destructive forces slowly wear away the Earth’s features.

Destructive forces = tear down


Earth s interior

So whatis inside the Earth’s interior?


Earth s interior

Evil Spirits?


Earth s interior

Cheese?


Earth s interior

The ugly dude in Lord of the Rings?


Earth s interior

These people?


Earth s interior

Fact!

The deepest mine in the world is only 2.4 miles deep.

The center of the Earth is over 3728 miles deep!


Earth s interior

Soif we can’t get to the center of the Earth, how do we know what’s there?


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Indirect Evidence!!!!!


Earth s interior

Scientists use seismic waves to infer what the interior of earth is composed of.

Seismicwaves are energy waves that travel through Earth’s interior during earthquakes


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A Journey to the Center of the Earth


Earth s interior

Temperature and pressure increase as you move into Earth’s interior.


Earth s interior

Earth has three major layers

1. The Lithosphere

2. The Mantle

3. The Core


Earth s interior

The Lithosphere

The Lithosphereis the layer of the Earth that includes the Crust and the Upper Mantle


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Lithosphere = Crust + Upper Mantle!

By the way, there are two types of crust, continental crust and oceanic crust.

Continental crust is mostly made of the rock Granite. It is not very dense but very thick!

Oceanic crust is mostly made of the rock Basalt. It is thinbut very dense!

The Upper Mantle is just hot solid rock


Earth s interior

The Mantle

The Asthenosphere is the softer part of the Mantle. The rocks here are melted and can slowly stretch and flow. Under this layer the mantle becomes solid.


Earth s interior

Core

The Outer Core is liquid metal (iron and nickel).

The Inner Core is solid metal (iron and nickel).


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