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    Earthquakes make seismic waves that travel through the earth. There are two types of seismic waves called P waves and S waves. Explain how P waves and S waves help scientists learn about the inside of the Earth.

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    (Original post by xPunkx)
    Earthquakes make seismic waves that travel through the earth. There are two types of seismic waves called P waves and S waves. Explain how P waves and S waves help scientists learn about the inside of the Earth.

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    By measuring the speed at which they travel we can work out the density of the earth in different places. Also we can measure the refraction at different boundaries inside the core to find the relative densities and the different layers inside the earth. This is done by measuring the strength and time of travel of the waves at different places on the earth.

    Edit: its a bit vague but I cant remember any more detail off the top of my head - sorry about that
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    Thanks very much I also managed to find some stuff in my revision guide so I'm all clear on that now! Thanx!
 
 
 
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