Watch Mr. Wizard - Formation of rocks [upgrade]

An episode of an entertaining and informative educational TV series which aired on U. S. broadcaster NBC. Mr Wizard (Don Herbert) demonstrates to a kid how rocks are formed through a series of easy to understand experiments. No commercials, though there's a PSA for eating a good breakfast. Aired live from Chicago, and recorded as a kinescope. Re-upload with much improved sound quality. I've been going through my old DVD collection and came across the Alpha Video DVD that featured the show.