topic: inferred properties of - plainview · simple model of earth’s interior. esrt page 10...
TRANSCRIPT
Topic:
Inferred Properties of
Earth’s Interior
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?
