The students can see that I am putting energy into the slinky in two different ways. A quick push down the length of the stretched out slinky demonstrates a pressure wave and a quick flip of the wrist will send a shear wave down the slinky. This allows the students to answer questions about why P waves travel faster than S waves. Also, they can see why P waves can travel through a liquid while S waves cannot. I first do the demonstration as described above then they break up into groups to experiment for themselves. I provide one slinky for every 4 students. We then talk about the liquid outer core of the Earth and how this would effect seismograph readings around the globe. Then I give a quiz to help them focus on what they have learned.


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    Higher Education,NSDL,Undergraduate (Lower Division),Seismology,Vocational/Professional Development Education,oai:nsdl.org:2200/20100502201320358T,Geoscience,NSDL_SetSpec_380601



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