Topic: Inferred Properties of Earth’s Interior

CrustCrust

MantleMantle

Outer CoreOuter CoreInner Inner CoreCore

Simple Model of Earth’s Simple Model of Earth’s InteriorInterior

ESRT page 10

Yes, take out your ESRT

NOW!

Thanks

Density of the Crust on the ESRT

Increasing Depth

Increasing Density

What section of crust is shown in the diagram?

Crust-

MantleMantle

Th

icker

Th

inn

er

Felsic & mostly granite

Mafic & mostly basalt

Continental Crust vs. Oceanic Crust

Continental:

--------

Oceanic:--------

What is the Lithosphere?- -

- -

What is the Moho?

MOHO- Mohorovicic Discontinuity:

– -

Andriji Mohorovicic.1909

What is the Asthenosphere?• -• -

Diverging Plates

Conv

ergi

ng

Plat

es

Converging Plates

What is the Mantle?

Thickest

layer of the Earth

• -• -

What is the Outer Core?

Outer Core

• -• -

What is the Inner Core?

Inner Core

• -• -• -

Composition of the Cores

• -

• -

Review QuestionWhat are the major differences

between the continental crust and the oceanic crust?

Continental:•-

Oceanic:•-

ESRT pg 10

More on the Interior

Surface of Earth

Center of Earth

Radius of Earth = 6378 KM

Sample Question: What is the depth of the outer and inner core boundary?

5100 km (remember units!!!)

Represents the Pressure at different depths

What is the Pressure at the mantle and outer core boundary?

1.5 millions of atm.

Line represents the temperatures inside the earth

What is the temperatures at the lithosphere and asthenosphere boundary?

1000°C

This dotted line shows the melting point of material in the Earth. What does melting point mean?

-From Solid to a Liquid

If the temperature is below the melting point, what phase is it in?

-Solid

Which layers in the diagram have temperatures below the melting point? Which phases are they in?

Liquid phase where temps. are above the melting point.

Solid

Solid

Solid

Liquid

Final Question:

• Which type of crust is the most dense?