VOD for middle and high school - Materials - properties and uses

Water is vital for life, but must be cleaned in order to be consumed safely. Today it is not always possible to drink water straight from the reservoir. It should be treated to become potable. The next video shows the purification process of drinking water.

The natural world is full of mixtures, but sometimes we actually seek to separate them into their components. Toward this goal, scientists have developed advanced separation techniques, enabling us to refine crude oil, desalinate water, and even extract cellular DNA.

Butter shortage in the stores? Here’s how to make it at home.

A simple and visually impressive experiment reveals what a black marker’s color is really made of.