Khan Academy
Why S-Waves Only Travel in Solids, Cosmology and Astronomy
Starting with a clear diagram to demonstrate how a wave actually forms, an informative video will provide a great summary of s-wave travel. It explains the difference between polar bonds in liquids and the stronger ionic and covalent bonds.
Curated OER
Chemical Bonding
Discover interesting facts about chemical bonding. Your class will learn all about covalent and ionic bonds, metals, non metals, ions, protons, and electrons as the Bond Sisters explain their relationships. A little fast but still a good...