posted by Roderick .
My child is doing a project on the earth. He is trying to do a power point presentation on the earth. He ran across information that stated, "The earth is divided into several layers which have distinct chemicals and seismic properties". He would like to know something that he could include about seismic properties and how to word it on his poperpoint slide or just how to research it. Please help. He is running out of time. Thanks. Mom
you could try looking on googleor if you do that you have to be specific with you questions.