MAYBE NOT. Your exploratory activity:using your slinky, try to create at least 2 different waves associated with earthquakes
BODY WAVESThese travel through theinterior of the earth• P-wave• S-wave
These travel through theinterior of the earth BODY WAVES• P-wave• S-wave These are Primary Waves They travel the fastest out of the 4 waves They are a pressure wave
These travel through theinterior of the earth•• P-wave S-wave BODY WAVES These are Secondary Waves They travel the slower than pressure waves They are a shear wave They dont travel through liquids P- and S-wave videos
These travel through theinterior of the earth BODY WAVES• P-wave• S-wave These waves travel faster in denser layers Why does the s-wave speed drop to zero in the outer core?
TRIANGULATIONNow lets triangulate! Find the distance from the epicenter using the Time Travel Graph Adjust your compass so that the radius of your circle is the same as the distance to the epicenter Draw a circle with the compass Do the same for the second and third
TRIANGULATIONHartford, CT 6 minutesDallas, TX 3.4 minutesFt. Wayne, IN 4.8 minutesWhere is the shaking going on?
TRIANGULATION• We call the origin of the shaking an epicenter
TRIANGULATIONWhat are three things thatdetermine how much shakinggoes on?• Lets talk in groups!
TRIANGULATION• Distance from epicenter• Depth of focus• Magnitude of energy Whats going on in this picture?
LIQUEFACTIONGrains are shakenuntil they aresuspended in water
LIQUEFACTIONThis can be a major problemfor some places very close to home
WHAT WOULD YOU HAVE DONE DIFFERENTLY?As a leader of a country bordering the ocean, I want you to makea plan of action of what you would have done in this situation:• Yourassignment is to write a two paragraph essay about what those who ran the countries that were affected by the tsunami did wrong, and what would you have done to prevent the amount of death and destruction to your country?• Some things to consider are: building design, where to build (i.e. topography of the land), escape plans, early warning devices, etc.
SEISMIC PROFILES Seismologists can even use it toestimate how thick the crust is
BELLWORK• What did you learn last week?• What weighs more: 100 lbs of lead or 100 lbs of feathers?• Which is denser?• Railroad crossing, without any cars. Can you spell that without any Rs?• The nearest galaxy to us is the Andromeda Galaxy. Its 2.5 million light years away and moving towards us at 300 km/s. How many years will it take to hit our galaxy? I want you to set up the dimensional analysis for this question using the following conversions• 3.26 light years= 1 parsec• 1 parsec = 31 trillion km