Page 21 - Curriculum Visions Dynamic Book. To close the book, close the window or tab.
P. 21
(Right) This diagram shows the way in which waves would spread out if the earth was made of exactly the same material right to the core. Notice that the waves move in straight lines.
Los Angeles
P and S waves
(Right) Seismic waves reach distant points sooner than you would expect if the earth were made of the same material as the crust. In fact, waves travel faster in more dense material, so the core must be more dense than the crust.
Shadow zone
Shadow zone
P waves
P and S waves
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