Start with 3 clay balls of different colors. Roll them together into one ball. Smash the ball flat like a fat pancake. Stand the pancake on its edge and then smash the clay flat again. Cut the clay into 4 sections. Students will look at the cut edges to see how the heat and pressure have made the colors stick together just like the minerals in metamorphic rocks stick together after being subjected to the heat and pressure deep in the earth.
- بازدید: 3525
