Unit 4: Minerals and rocks                                                       1   2   3   4

3.4. The rock cycle

     The rock cycle is a set of processes which form, change and recycle rocks

     over time.

     These processes can take thousands or even millions of years.

     On the Earth’s surface, weathering and erosion break down and transport

     rocks. Under the Earth's surface, rocks go through processes

     which change them. As a result, they become new rocks.

     The cycle is continuous.

3.9.  Indicate the factor that chages:

       a. A metamorpphic rock into magma

       b. Magma into a magmatic rock

       c. A magmatic rock into a sediment

       d. Sediment into a sedimentary rock

       e. A sedimentary rock into a metamorphic rock

3.10. Complete the diagram about the rock cycle,

         putting in their place the following labels.

         Pay attention, you have to repeat some of them.