...and after this, the students eat the whole lot, simulating subduction.
>Demonstration
>The Rock Cycle
>
>
>
>Materials
>1. Microwave
>
>2. Gram Crackers
>
>3. Marshmallows
>
>4. Hershey's Chocolate
>
>5. Icing
>
>Safety
>Address any rules concerning food in the classroom.
>
>Procedure
>1.Simulate magma rising and cooling using a box of gram crackers,
>marshmallows, and chocolate.
>
>2.Have students pull out one gram cracker, one marshmallow, and a piece of
>chocolate to simulate erosion.
>
>3.Have students combine sediments (gram cracker, marshmallow, and
>chocolate). Use icing to signify Lithification.
>
>4.Put the combination in the microwave and cook it.
>
>Questions
>1.What does lithification mean?
>
>2.What does Metamorphism mean?
>
>3.What will happen with extra heat and pressure?
>
>4.What are two different kinds of erosion?
>
>5.Tell me another route that could be taken in the rock cycle.
>
>Explanation
>This demonstration is a model of what happens during the rock cycle. Magma
>rises to the surface, when it cools igneous rocks are formed. The rocks
>are eroded either chemically or mechanically. The sediments are lithified
>into sedimentary rocks. When they are put under extreme heat and pressure
>the rocks become metamorphosed. If they are put under extreme heat and
>pressure they change into magma again.
Sorry!
Chris
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Dr Chris Mawer : email: [log in to unmask]
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QLD 4006 Australia :
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