Plasticity Lab

In our science class, we did a lab about the structer of the earths plasticity. In this lab, we mixed five teaspoons of cornstarch and twenty milliliters of water together. The we added a couple of drops of food coloring in the mixture and stirred untill hard. We eventually got a solid and a liquid, because it was a solid when you applied pressure to it such as the crust applying pressure to the mantle. And when you let it be, it would melt into goo. And when you hit it or pushed your finger in fast, it would hurt your hand, but when you pushed your finger in slowly, your finger would melt into it. This mixture is similar to the earth's mantle, because, like the mantle it is like an iron liquid.