topic: inferred properties of - plainview · simple model of earth’s interior. esrt page 10...

Topic:

Inferred Properties of

Earth’s Interior

https://www.youtube.com/watch?v=hmgR4PiGp1E

Crust

Mantle

Outer CoreInner

Core

Simple Model of Earth’s

Interior

ESRT page 10

***All Interior info is

based on: Studying

Seismic (earthquake)

waves

*** the outer core is a

liquid!!!!

Melting point is lower

than temperature

The Crust

Mantle

Thic

ke

r

Thin

ne

r

Felsic &

mostly

granite

Thicker

Thinner

Continental Crust vs. Oceanic Crust

Continental: Oceanic:

-Thick -Thin

-Felsic -Mafic

-Lower density -Higher density

-Mostly Granite -Mostly Basalt

What is the Moho?

MOHO-Mohorovicic Discontinuity:

boundary between crust & mantle

Andriji Mohorovicic.1909

Density

Increasing

Depth

Increasing

Density

What section of crust is shown in the diagram?

What is the Lithosphere?

Lithosphere

- crust & rigid mantle

- divided into sections “plates”

What is the Asthenosphere?

Asthenosphere

Partially melted layer of mantle

Convection moves lithospheric plates

Mid-Atlantic Ridge in Iceland (J. Parkinson)

Over the Mid-Atlantic RidgeTo North

America

To Europe

J. ParkinsonMid-Ocean Ridge Video Clip

Diverging Plates

Fill in on ESRT New ocean

crust created

Old crust

destroyed

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

Earth’s Core is:

Similar to meteorites

Origin of Earth’s magnetic field – iron & nickel magnetic elements

ESRT pg 10

More on the Interior

Surface of Earth

Center of Earth

Radius of Earth = 6378 KM

Sample Question:

1. What is the depth of the outer and inner core boundary?

5100 km (remember units!!!)

Represents the Pressure at different depths

2. What is the pressure at the mantle and outer core boundary?

1.5 million atm.

Line represents the temperatures inside the Earth

3. What is the temperature at the lithosphere and asthenosphere boundary?

1000°C

4. Which layer(s) of Earth is in the liquid phase?

Outer Core

Solid

SolidSolid Liquid

FQ:

Which type of crust is the densest?