Watch the short video below to find out how to make slime.

Items you'll need are:

  • Cornflour
  • Water
  • Food colouring
  • Mixing bowl
  • Spoon

Science behind the experiment

Slime is an example of a non-Newtonian fluid. When you apply a force (like a stir) to the slime, it gets thicker and more like a solid. When you stop applying a force, then the slime gets runny and more liquid like again.

Key Terms

  • Non-Newtonian Fluid – A fluid that changes its viscosity (how fast or slowly it will flow) when the forces on it changes.
  • Force – Forces are pushes and pulls in a particular direction.
  • Solid – Solids stay in one place, can be held and keep their shape.
  • Liquid – Liquids can flow or be poured easily, change their shape depending on the container they are in, but their volume stays the same.

Activities and Questions

How does your slime change when you stir slowly or quickly?

Can you roll your slime into a ball? Now leave it on the palm of your hand, what happens?

Can you think of any other non-Newtonian fluids?

What is a Newtonian fluid?