Hunting the Elements

I learned that when you add simple metals like iron in small amounts to sand  (glass) it makes a much stronger type of glass. I also learned that you can use carbon 14 and carbon 12 which are in everything to figure out how old the object is. And when you add sodium and chlorine togather it makes simple table salt. My favorite part of the video was when they used raw metals to repell sharks in the ocean from a peice of meat!

 

Hunting the Elements video:

http://www.pbs.org/wgbh/nova/physics/hunting-elements.html