Matter
Study Jams - Properties of Matter
Brainpop - various "Matter" movies/transcripts
http://www.chem4kids.com/files/matter_intro.html
http://eschooltoday.com/science/states-and-behaviour-of-matter/what-is-matter.html
https://phet.colorado.edu/en/simulation/states-of-matter-basics
https://www.nationalgeographic.org/video/definitions-field-matter/Â