1. Do Now: Copy diagram and label
Earth’s Interior
Do Now: Copy diagram and label

2. What is it like inside the Earth?
Dense
Hot
Solid or liquid depending on the layer
SEE ESRT page 10
Outer core is a liquid,
Inner core is a solid

5. How do we know about the earth’s interior?
From earthquake data
From meteorites
Remember- P waves can travel through everything, S-waves can travel through solids only
Creates a Shadow Zone- 102° to 143° away from the epicenter
The speed of the seismic waves depends on the density of the material- more dense, faster waves
The Moho was discovered this way…

6. http://earthquake. usgs. gov/learn/animations/animation. php

7. Why is there a Shadow Zone?
Earth’s outer core is a liquid and seismic waves cannot travel through this zone.
P-waves are refracted and S-waves cannot travel through this at all.