ScienceCasts: Starting Fire in Water

Astronauts on the ISS are experimenting with a form of water that has a strange property: it can help start fire. This fundamental physics investigation could have down-to-Earth benefits such as clean-burning municipal waste disposal and improved saltwater purification.

 

The uncertain location of electrons - George Zaidan and Charles Morton

The tiny atoms that make up our world are made up of even tinier protons, neutrons and electrons. Though the number of protons determines an atom's identity, it's the electrons -- specifically, their exact location outside the nucleus -- that particularly perplex scientists. George Zaidan and Charles Morton show how to make an educated guess of where those itty-bitty freewheeling electrons might be.

 Lesson by George Zaidan and Charles Morton, animation by Karrot Animation.

 

How atoms bond - George Zaidan and Charles Morton

Atoms can (and do) bond constantly; it's how they form molecules. Sometimes, in an atomic tug-of-war, one atom pulls electrons from another, forming an ionic bond. Atoms can also play nicely and share electrons in a covalent bond. From simple oxygen to complex human chromosome 13, George Zaidan and Charles Morton break down the humble chemical bond.

 Lesson by George Zaidan and Charles Morton, animation by Bevan Lynch.

 

Hewitt-Drew-it! 52. The Periodic Table

Paul discusses some features of the periodic table of the elements.

 

ScienceCasts: Strange Flames on the International Space Station

Researchers experimenting with flames onboard the International Space Station have produced a strange, cool-burning form of fire that could help improve the efficiency of auto engines.

 

Percent Oxygen in Air

This video demonstrates how to determine the percent of oxygen in air using some simple equipment.