We’ve looked at the properties of liquids, but the scientist Issac Newton noticed that some liquids don’t follow the same rules and he named them non-Newtonian liquids.
A mixture of cornflour and water is a type of non-Newtonian liquid. When is it under pressure or agitated it can become solid. When you leave it alone it then becomes a liquid again.
What other liquids can you think of that behave in a strange way?