Simple experiment for kids | Toothpick experiment | Must try experiments

Описание: #5minutecrafts #short #scienceexperiment

Materials required:
Toothpicks
Water

Science behind this experiment :

This process is called capillary action.

The trick works because toothpicks are made of dry wood that contains microscopic hollow tubes called capillaries. When you break the toothpicks, the wood fibers inside stretch and compress. When you add water to the middle of the star formation, the water is absorbed into the toothpicks through capillary action.

As the wood absorbs more of the water, the bent wood fibres expand and straighten out. Each toothpick end pushes against the others. As the toothpicks straighten and push against each other, the inside of the star opens up.