Response Blog ;)

In class, we did an experiment on plasticity. To start, we mixed corn starch with water. This created a substance that looked as if it were liquid, but acted as a solid. When put into my hands, and rubbed into a ball, the substance acted as a solid. After I stopped rubbing it into a ball, the substance flattened out almost immediately, showing liquid properties. This is an example of how the earth's mantle is. When heat and pressure are added to the mantle, it takes on the role of a solid. When it is taken away, it takes on the role of a liquid. Without the heat and pressure pushing on the earth's mantle, it would take on the role of a liquid, evidently, making us sink towards the center.