How well do you know slime?

Slime can flow slowly like a liquid and hold its shape briefly like a solid.

Borax contains boron, which helps create links between the long molecules in glue.

Shaving cream adds tiny air bubbles that give fluffy slime its light texture.

Viscosity describes how easily—or slowly—a material flows.

Activator helps connect glue molecules into a stretchy network.

A little more activator can reduce stickiness, but too much can make slime stiff.

Thermochromic pigment changes appearance when its temperature changes.

Fine sand changes the way slime feels and moves.

Glue contains long polymer molecules that can link together during slime making.

Extra activator can create too many links, reducing stretch and softness.