Free Science Videos and Lectures

This video shows what different colors the alkali elements burn.

Strontium chloride, barium chloride, sodium chloride and potassium chloride are burned.

This video was done by YouTube user 'nitrex'.

This science video contains:
burning, colors, fire, alkali, strontium chloride, barium chloride, sodium chloride, potassium chloride

A slow motion video of a corn popping.

This science video contains:
high resolution, slow motion, corn, popcorn, burst, explode

Sodium does not react easily with oxygen at a room temperature so it has to be heated up a little for the reaction to start.

Since air is mostly oxygen once the reaction starts it gets pretty...

This science video contains:
explosion, heat, burning, reaction, fire, air, oxygen, sodium

The most famous American astronomer and astrophysicist Carl Sagan explains the Drake equation.

The Drake equation (rarely also called the Green Bank equation or the Sagan equation) is a famous...

This science video contains:
life, planets, stars, carl sagan, drake equation, extraterrestrial intelligence

The potential between two lines is 500kV, that's half a megavolt! At these potentials the air molecules get ionized and the air transfers electricity creating an impressive electric discharge.

The...

This science video contains:
power station, 500 kV, current, electricity, eldorado, boulder city, nevada, electric potential, discharge