Earth Structure http://www.showme.com/sh/?h=343quHo
Earthquakes http://www.showme.com/sh/?h=u1EGXPk
Watch this 4 minute video on earth structure: https://www.youtube.com/watch?v=IWZky7mXoO0
Review Questions:
1. What are the zones of the earth’s interior? (Start from the surface and identify the different layers all the way to the center. Include a description of the asthenosphere. Include the thickness of each layer.
2. What is an earthquake? What causes them?
3. Name and describe the different types of earthquake waves (what material will they travel through; what kind of wave motion is involved; what is their relative speed)?
4. How is the epicenter location determined?
5. When we hear on the news that an earthquake has a magnitude of 7, what does this mean? What scale is being used? How does the scale work? What information is needed for the calculations?
6. Around the world, in general, where do most earthquakes occur? Why in these locations?
7. What are the main factors that determine the amount of building destruction caused by an earthquake?