1. Science Starter Turn in your Dynamic Earth Homework & Graham Cracker Lab Grab your notebook Answer the following questions on a new page: An Earthquake has just struck Mexico City and Seattle, WA. You are watching the news in your apartment in New York and need to know how long you have before the Earthquake hits your home. How do you figure this out? Date: 3/4/2015

2. Today’s Agenda: Unit 2 Dynamic Earth Day 4 Science Starter Earthquake Simulation Taking a Step Back.. Locating an Earthquake Lab Viscosity Demo Summary

3. Earthquake Simulation Think back to the situation in the science starter… Imagine that the left side of the room is Mexico The center of the room is Seattle The right side of the room is New York City How can we figure out where the Earthquake hits and prevent future damage?

4. Lesson Essential Question How do we locate Earthquakes?

5. What do we know about Earthquakes? 1.Anatomy of an Earthquake 2.3 Types of seismic waves 3.Locating an Earthquake requires seismographs

6. Anatomy of an Earthquake Focus: The point underground where the Earthquake begins Fault: A break in the ground Epicenter: The point on the surface of the Earth directly above the focus

7. 3 Seismic Waves Primary (P Wave): Fastest wave, push/pull movement, least amount of damage Secondary (S Wave): Slow wave, up/down movement, medium amount of damage

8. SURFACE WAVES Travel along the earth’s surface. They do not travel through the Earth. They move up and down or side to side. Although it is the slowest, this is the most destructive type of wave!

9. Seismograph The seismograph records ground movements caused by earthquakes, explosions, or other Earth-shaking phenomena.

10. SCENARIO 1: Watch! P Wave = _____________ S Wave = _____________ Answer = ______________ SCENARIO 2: P Wave = ____________ S Wave = ____________ Answer = _____________ 9 10 11 12 13 14 15 16 17 18 19 20 3:00 3:02 3:04 3:06 3:08 3:10 3:12 3:14 3:16

11. Seismograph registered P wave at 3:00pm and then registered S wave at 3:05pm

13. Seismograph registered P wave at 4:07pm and then registered S wave at 4:09pm

14. Locating an Earthquake Lab There will be a lab print out for every student The data from the 3 seismographs is provided on your handout Use Figure 1 and Figure 2 to discover the distance from the city to the epicenter Use your compass and the map provided to you to draw your 3 circles Identify the latitude and longitude of the Earthquake!

20. Locating an Earthquake Lab Once you have located the Earthquake epicenter on your group map, identify the position on your lab handout Answer the 4 analysis questions using the information you used in the lab If you are finished, make sure you have turned in all Unit 2 assignments!

21. Viscosity Demo What is the difference between the 2 syrups? What is the definition of viscosity? How can a liquid become more viscous or less viscous? How does this effect the violence of a volcanic eruption? How does this relate to convection?

22. Today’s Summary As a group pull out one piece of paper Everyone in the group should write down one thing that they learned today You can not write down something that someone in your group has already stated Make sure everyone’s name and group number is on the paper! Groups with great answers will get 3 points!

23. Homework Finish the 2.4 locating earthquakes worksheet Use what you learned today to read the graphs and answer the questions Due tomorrow at the start of class!