Download Earth`s Interior

Earth’s Interior
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Journey to the Center of Earth Trailer
http://youtu.be/zfHvHwrL5gU
Inside Planet Earth: Discovery Channel
http://youtu.be/oR4Pb0ovVLU
Great Video-------Down to the Earths Core, National Geographichttp://documentaries-plus.blogspot.com/2012/05/down-toearths-core.html
How do we know what the center of the earth is like?
What are some
characteristics of
the interior of the
Earth?
•The Earth’s Interior
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Objectives:
1. Describe the changes of temperature, pressure and density at increasing
depths below the earth’s surface .
2. Explain how the earth’s structure has been determined from seismic
evidence.
3. Compare and contrast the properties of P waves and S waves.
4. Describe the location and composition of the earth’s core, mantle and crust.
5. Explain why the inner core is solid and the outer core is liquid.
6. Compare and contrast the lithosphere and the asthenosphere.
7. Define plasticity and explain its effect on the movement of the Earth’s crust.
8. Explain how the Moho boundary was discovered.
Are we there yet??
If I were to dig a hole how
do I know where to start
digging?
How far down
do you think
we’ve gone?
Only about 7.5 miles of
the 3,950 miles
Has anyone
every traveled
to the center
of the earth?
Why even study earths layers?
• Age
of the earth
• Composition
of the
earth
• How
new earth can
be resurfaced
Seismic waveswaves of
energy that
travel through
the earth.
Earthquakes
explosions
Created
by
Ocean
waves
wind
P and S Waves
Click here for animation
P Waves
S Waves
-Primary
Waves
- Secondary
Waves
-travel faster
then S Waves
-travel slowly
-cannot travel
thru fluids
•So why know P & S waves at all?
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Identifies us what a
model of the Earth’s
interior would be
Tsunami Video
Structure of the Earth
Seismic
Velocity
depends on:
P Waves
Fast
Composition &
Density of
materials
P Waves Slow
Waves change
direction and
speed
P Waves Fast
Core
Core
Inner
Core
Outer
Core
Solid
Molten, hot
Liquid
Iron &
Nickel
Iron &
nickel
Magnetic
field
9,032° F
~6,500° F
• Think about it
• If
the temperature of
the inner core is
higher than the outer
core, why is the inner
core solid and the
outer core liquid?
original heat
subsequent radioactive decay
conduction
convection
The
Mantle
 Largest Layer
 1600°F at the top and 4000°F at the bottom
 Moves by convection
 Plasticity- ability of a solid to slow or change in shape (taffy)
The Mantle
 Largest Layer
 1600˚F at the top and 4000˚F at the bottom
 Moves by convection
 Plasticity-ability of a solid to slow or change in
shape (taffy)
Asthenosphere
directly below lithosphere
upper edge of mantle
made of hot, molten material
plasticity
Moho
boundary Separates
crust from the
mantle
-lowest part of
the earths
crust
-seismic waves
change
velocity
Earth’s Crust
Magma
Granite Rock
Moho
Boundary
Basalt Rock
Upper Layers of the Earth
Lithosphere
• solid, outer layer
• consists of crustal plates
•Review
• Name
the four layers of the Earth in order
from the outside to the center of the Earth.
• What causes the mantle to "flow"?
• What are the two main metals that make up
the outer and inner core?
• http://www.youtube.com/watch?v=thuViax
Rd_w&feature=related
• Journey
to earths core: history channel
http://www.youtube.com/watch?v=QTDEQB
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