Here's why:
* Solids have a fixed shape and volume.
* Liquids take the shape of their container and have a fixed volume.
* Non-Newtonian fluids have properties that change based on the forces applied to them.
Examples of Non-Newtonian Fluids:
* Oobleck: A mixture of cornstarch and water that acts like a solid when you punch it, but flows like a liquid when you pour it.
* Ketchup: Thicker and harder to pour when it's sitting still, but flows more easily when shaken.
* Quicksand: Acts like a liquid if you move slowly, but like a solid if you struggle against it.
How it works:
Non-Newtonian fluids have molecules that can change their arrangement depending on the stress applied. They can behave like a solid when subjected to a sudden force, but like a liquid under normal conditions.