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!
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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?