kingwinner Posted October 10, 2005 Report Share Posted October 10, 2005 1) "When seismic wave hit the Moho (crust-mantle boundary), the speed of the wave increases. The increase in speed as the waves reach the mantle indicates that the mantle is denser than its crust."__The mantle is densier than the crust, so seismic waves speed up as they reach the mantle! How come seismic waves speed up as they travel through denser layers? (Should it be harder to pass through instead, if it is densier?) 2) In my book, it also says "Seismic waves travel faster through more rigid materials"__Is rigidity directly proportional to density? Please help, I don't understand! :confused: Quote Link to comment Share on other sites More sharing options...
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