Mixing cornstarch and water causes a physical change. when the powder cornstarch is mixed with a small amount of water, the mixture

Mixing cornstarch and water causes a physical change. When the powder cornstarch is mixed with a small amount of water, the mixture is called Oobleck.  It  is a non-Newtonian fluid; it has properties of both liquids and solids. You can slowly dip your hand into it like a liquid, but if you squeeze the oobleck or punch it, it will feel solid.