Do Now 1._upper layer of the mantle that moves slowly like putty (layers of the earth) 2. _boundary where two continental plates collide (graphic organizer)

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Presentation transcript:

Do Now 1.___upper layer of the mantle that moves slowly like putty (layers of the earth) 2. ___boundary where two continental plates collide (graphic organizer) 3.___ trees planted around a field to prevent wind erosion (soil conservation) 4. ___formed when a seamount breaks the surface of the ocean (ocean floor) 5.___name one way water is polluted (water pollution)

Key Questions 1. What is an earthquake? 2. What causes an earthquake? 3. What are seismic waves? 4. What are the two types of seismic waves? 5. What are P waves? 6. What are S waves? 7. What is the focus? 8. What is the epicenter?

1. What is an earthquake? 1.An earthquake is the shaking that results from the movement of lithospheric plates. graphic#p/search/2/nmkp7Cpc13g

2. What causes an earthquake? 2. elastic rebound causes earthquakes by the sudden return of rocks to their original shape

3. What are seismic waves? 3. Seismic waves are waves of energy that travel through the Earth.

4. What are the types of seismic waves? 4.  Body Waves-travel inside the Earth Surface Waves-on the Earth’s surface (cause the most damage and are the slowest)

5. What are P waves? P waves= Primary Waves 1 st to be detected FASTEST waves Travel through solids, liquids, and gases

6. What are S waves? S waves=Secondary waves Cannot travel through liquids (outer core)

7. What is the focus of an earthquake? 7. Focus- the point inside the Earth where an earthquake starts.

8. What is the epicenter of an earthquake? 8. The epicenter -is the point on the Earth’s surface directly above the focus.

Observe animations of earthquake waves

Fence line moved 8.5 feet 1906 San Francisco Earthquake