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Most Viewed Science and Free Education Videos (page 8)

Sodium Burning in Air

Sodium Burning in Air

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 Search for Extraterrestrial Intelligence by Carl Sagan

The Search for Extraterrestrial Intelligence by Carl Sagan

To reach other intelligences our technology must reach beyond interplanetary distances it has to go interstellar distances.

The largest radio radar telescope on the planet Earth - Arecibo radio...

This science video contains:
life, stars, carl sagan, milky way, galaxies, intelligence, civilization, radio telescope, extraterrestrial, arecibo, puerto rico, m15, signal, prime numbers

2.2 MegaVolt Lightning - Lichtenberg Figures

2.2 MegaVolt Lightning - Lichtenberg Figures

The interior of an 18" square x 1" piece of Plexiglas was charged to 2.2 million volts (MV) using a 5 MV particle accelerator. A layer of excess electrons become trapped deep inside. When...

This science video contains:
electrons, potential, lightning, plexiglas, lichtenberg figure, sculpture, charge, voltage, flash

Our View of the Universe

Our View of the Universe

The universe began with the big bang, and for the first four hundred thousand years all matter was ionised, indicated by the blue region in the diagram. When the universe had cooled enough to allow...

This science video contains:
matter, stars, earth, big bang, galaxies, light, solar system, time, space, supernova, expansion

Alkali Chemical Element Flame Test

Alkali Chemical Element Flame Test

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