Plasticity Lab

In science, we are learning about the Earth's layers. In the Plasticity lab we were simulating the properties of the Earth's mantle. The Earth's mantle is a solid that behaves as a liquid as it flows. To simulate this liquid-like solidity, we mixed water with corn starch. This created a very peculiar compound. When it was in one place with no friction or heat it act like a solid, and when friction or heat was applied, it turned liquid-like and runny. I observed that when pressure was applied it turned to a solid. For example, when I rolled it up into a ball, it quickly morphed into a solid. But as soon as I let go, it went back to a liquid. This has to do with the Earth's mantle because the mantle moves as a liquid but physically is a solid, just like the corn starch and water compound.