sábado, 23 de octubre de 2010

Rock cycle summary

this topic is abput the rocks and minerals a mineral is a material with a define structure and coposition and a rock is a mixture of mineral . like many thing in the wrld that ha ve cycle alo the rocks have cycle and this never ends this have the name of rock cycle .

the rock begins with hot melted magma that cmes out by volcanic eruptions , the the rock becomes solid and made igneous rock . then by the proces of erosion the rock form new plates that is call sedimentary rock .the last step in the process is when the rock returns to the center of the earth and became magma again , this proces is licke too fast but ocurs in millions of years .

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