2. Shaking UP Waves Thursday March 8 th, 2012 Warm-up: Read the Introduction to answer the following: 1. What do scientists use to record the wave generated during an earthquake? 2. What relationship can be studied from the seismograph? Objective: SWBAT collect and analyze data IOT explain the relationship between amplitude, energy, and magnitude.

3. While you are eating breakfast in a small café in southern California, an earthquake occurs. The ground begins to shake and your orange juice spills on the table. Just when you decide to take cover, the ground settles down and comes to rest. Earthquakes are the Earth’s way of releasing built-up stress in the crust. Energy that travels through the crust demonstrates wave properties. Scientists can record the waves generated during an earthquake using a device called a seismograph. The seismogram produced can be examined in order study the relationship between the amplitude and the energy of a wave produced by an earthquake.

4. Shaking Up Waves INBOX From We figured out that wavelength and frequency are related. Do you think any other wave parts and properties are related? I don’t know. If frequency is related to something, maybe amplitude has a connection with something. Do you think we need to know this information for the job? The ad does say “extensive knowledge required.” I think we should cover all of our bases. I’ll look into this.

5. Open your textbook (Sound and Light) to page 27-28. Skim to answer the following: Explain how earthquake waves transfer energy. (Answer this in a complete sentence.) Earthquakes are generated when: Stress builds up in the Earth’s rocks and is released in the form of vibrations. There are 3 types of seismic waves, they are: Primary waves (longitudinal), Secondary waves (transverse), and surface waves (both).

6. Not all earthquakes are of the same strength. Some earthquakes release more energy and have a greater magnitude than others. The Richter scale is a standard scale used to compare the magnitude of earthquakes. A lower number on the Richter scale implies an earthquake of a lower magnitude.

7. Vocabulary Reference Magnitude The amount of energy the earthquake wave has. Measured using the Richter scale. (As magnitude increases the amount of energy released increases)

8. 3.Examine the seismogram on Student Resource Sheet 1. This seismogram was recorded on June 26, 1994, in Berkeley, California. Three earthquakes of different Richter scale magnitudes were recorded in a 12-minute period. The waves produced by each earthquake are labeled on the seismogram.

9. STUDENT RESOURCE SHEET 1 SEISMOGRAM 1 st Earthquake- 3.2 2 nd Earthquake- 2.5 3 rd Earthquake- 4.2

10. #3 Rank the earthquakes in order of increasing amount of energy released. Justify your response using information from the investigation. * The 3 rd has higher energy going thorough it, so it’s amplitude is the highest. RANKINGJUSTIFICATION 2 nd -1 st -3rd The 2 nd earthquake’s magnitude is the least, the 3 rd is the greatest, and the 1 st is in the middle.

11. #4 Compare the amplitudes of each of the earthquakes. Justify your response using information from the seismogram. The 3 rd earthquake has the greatest amplitude (4.2), the 2 nd earthquake has the lowest amplitude (2.5), and the 1 st earthquake’s amplitude falls in the middle (3.2).

12. #5 Identify the relationship between the amount of energy in a wave and the amplitude of the wave. Justify your response using information from the investigation. The greater the amplitude, the greater the amount of energy in the wave (and vice-versa).

13. What will you feel? Might not feel the 1 st and 2 nd earthquake Probably will feel the 3 rd

14. What about Maryland? New Medrid falt goes through MD Runs from Memphis, TN to Western NYS Howard County gets the most Last Earthquake: October 8, 2007 (1.3) epicenter right around Randallstown What is happening right now?.... http://www.mgs.md.gov/seismics/helicorder.php

15. Shaking UP Waves Friday March 9 th, 2012 Warm-up: *** ANSWER IN COMPLETE SENTENCES*** 1. Where do seismic waves transfer energy? 2. Which is greater? An earthquake with magnitude 3.4 or an earthquake with a magnitude 1.9? Objective: SWBAT collect and analyze data IOT explain the relationship between amplitude, energy, and magnitude.

16. Agenda Review Short Cycle Grade Determination (how to calculate) Earthquakes wrap-up Brain pop Review Exit Ticket

17. Grade Determination Add # of multiple choice correct to BCR pts earned Ex: 9/10 pts multiple choice + 2/3 pts for BCR = 11/13 Multiply your score by 2! Ex: 11/13 * 2 = 22/26 24-26 pts = A 22pts = B 20pts = C 18pts = D 16 and below = E

18. STUDENT RESOURCE SHEET 1 SEISMOGRAM 1 st Earthquake- 3.2 2 nd Earthquake- 2.5 3 rd Earthquake- 4.2

19. Exit Ticket Explain why earthquakes of a higher magnitude cause more damage. Be sure to include the following in your response: Energy transfer Relationship between magnitude and amplitude