Here is another model with more
than one layer. Recall the differences in P and
S wave speeds in solids and liquids, or review
them in Step 4.
the image to begin the animation. Click and drag
the slider to analyze the wave patterns. Consider
carefully what type of material each of the two
layers is made of.
7. Observe the path taken by P and
S waves in the model planet. Sketch the layers
on your diagram and indicate if they are solid