Plasticity Conclution

A few days ago we did a lab in school. The point of the lab was to see how the earths mantle worked. What we did was that we put water in a beaker and then we put cornstarch in the beaker. When those to mix together they make plasticity. Then when you put some body heat on the cornstarch with the water it gets hard(turns into a solid). However, when there was no body heat attracting the cornstarch it wound turn all gooey (turns into a liquid). The whole point of this lab was to see how the earths mantle works. The earths mantle is a solid because it had pressure being pushed against it from the core and the crust. Finally, if the crust and the core weren't pushing against the mantle then the earths mantle would be a liquid. Just like in the plasticity lab.