3-2-1 Contact — Season 1, Episode 5: Noisy/Quiet: Range of Vibration

Episode synopsis

Lisa, Marc, and Trini are given a puzzle. They hear a bell ring and, as instructed, put the bell in a closed jar and take out some of the air with a vacuum pump. Since they don't hear the ringing, they begin to wonder: Is the bell broken?

About 3-2-1 Contact

3-2-1 Contact is an American science educational television show that aired on PBS from 1980 to 1988, and an adjoining children's magazine. The show, a production of the Children's Television Workshop, teaches scientific principles and their applications. Dr. Edward G. Atkins, who was responsible for much of the scientific content of the show, felt that the TV program wouldn't replace a classroom but would open the viewers to ask questions about the scientific purpose of things.

More episodes from Season 1

• E1Noisy/Quiet: Production & Processing of Sound
• E2Noisy/Quiet: The Ear
• E3Noisy/Quiet: How People & Animals Use Sound
• E4Noisy/Quiet: Music
• E6Forces and Motion
• E7Forces and Fields
• E8Forces: Buoyancy and Gravity
• E9Forces and Machines
• E10Forces: A Spectacle of Forces
• E11Growth/Decay: Sex and Seeds
• E12Growth/Decay: Human Growth
• E13Growth/Decay: Decay