1. Thursday, 1/29/2015 Objectives: Describe Earth’s interior.
Explain how technology has helped us learn more about Earth’s technology.
Did you know that you can make 100,000 slices of toast with the energy of 1 lightning bolt?

2. Earth’s Interior Earth’s Layers Core Mantle
Inner core – solid Ni & Fe
4300° C km
Outer core – liquid Ni & Fe
3700° C km
Mantle
Mesosphere – rigid rock
Asthenosphere – plastic-like molten rock
1000° C km
Lithosphere – rigid uppermost part of asthenosphere and the crust
Crust
oceanic – basaltic rock
Continental – granitic rock
16° C ° C km

3. Liquid Outer Core
Magnetic Field Video – Earth’s magnetism in HD

4. True North vs Magnetic North
North ends of magnets are attracted to south ends of magnets.
North end of magnets are typically colored red.

5. How do we know what we know about Earth’s interior?
Examine rocks that come to the surface with magma.
Use seismographs

7. Temperature Inside the Earth
Between which depths does Earth’s temperature increase slowest?
Why does the graph show a temp of 16° C at 0m of depth?
How does temp change with depth?

8. Mantle

9. Earth’s Crust

10. Patterns
What happens to temperature, pressure, and density as one goes form the crust to the inner core?