1. which graph shows the melting of crystalline solids? explain your reasoning. 2. what type of solid does the other graph show? explain.

(1) The melting of a crystalline solid is best depicted by the second graph. This is because, the second graph shows a horizontal line which means that for a while there was no change in temperature. This zone is the latent heat of fusion. 

(2) The first graph shows the graph of a solid that is just heated but does not experience phase change. However, the second graph shows a solid that changes phase (from crystal/solid to liquid). 

Crust,mantle,core,earth