1. Getting Shaken by Earthquakes
Plate Tectonics Shaping our Crust: Volcanoes and Earthquakes

2. Objectives
Explain how movement along Earth faults release energy to cause Earthquakes
Describe and model the type of energy waves produced during an Earthquake

3. What is an Earthquake
A sudden and violent shaking and release of energy in Earth’s Crust.
Causes of Earthquakes
Plate Movement
Along fault zones
In volcanic regions or other man-made explosion
Earthquake occur
along plate boundaries
along faults
volcanic regions.

4. What is a fault?
A natural break or crack that make up Earth’s crust, along which rocks have moved relative to one another

5. Slinky Seismic Wave Lab
For this lab, the slinky is not a toy! Make sure not to drop it or get it tangled up
Make sure you answer all questions in complete sentences

6. Slinky Seismic Wave Lab
Jobs at your group:
2 slinky holders
Observer (start and stop)
Timer and Recorder

7. Types of Waves: P – Waves
The fastest and first energy (seismic) wave
Can move through solid rocks and liquids
Move in a straight push and pull motion
People can’t feel this wave

8. Types of Waves: S – Waves
Second energy (seismic) wave; slower than p-wave
Can only move through solids
Moves side to side
People can feel this wave

9. Types of Waves: Surface – Waves
Slowest and last and many energy (seismic) wave
Form when P and S waves reach surface
Moves up and down and rolls
Waves that people feel and are most dangerous

10. Anatomy of an Earthquake
Epicenter – location above the focus of an earthquake on the surface
Focus – area of slippage on a fault below the surface where the earthquake happens