To show and then play a movie, click on the arrow or the movie title/description. Repeat to hide it.

UCR L2 Movie 1: Iron and sulfur reaction & mass

UCR L2 Movie 2: Rusting steel wool & mass

UCR L2 Movie 3: Alka-Seltzer™ in water & mass

UCR L2 Movie 4: Reaction of epsom salt and ammonia & mass