We made different models in class to demonstrate different kinds of rocks.
Our group made rice krispie treats, which were an example of sedimentary rock. Sedimentary rock is a rock that is formed by a bunch of sediment, a bunch of particles, stuck together. This is the same as rice krispie treats, how the bunches of rice krispies stick together.
The food example of igneous rocks were the seafoam and peanut brittle. The ingredients to make these candies are the same, but the difference in the candy comes from how they cool (just like igneous rocks!). The seafoam demonstrates intrusive igneous rocks, cooling at a slower rate so there is crystallization. Peanut brittle is formed by the sugar cooling very quickly, which makes the shiny brittle candy, just like extrusive igneous rocks.
The butterfinger candy bars that we looked at were an example of metamorphic rocks. One of the best indicators that a rock is metamorphic is that they are foliated, they have these tightly packed layers. If you look at the inside of a butterfinger, the candy has these compact layers, just like metamorphic rocks.
Who knew learning about rocks could be so delicious!
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