Mr. Wizard's World

Steam Breaks Container, Navel Orange, Fresnel Lens, Balloon Rocket, North Pole, Sea Turtles and more (3x11)

Air date: Aug 11, 1986

Steam Breaks Container, Navel Oranges, Fresnel Lens, Balloon Rocket, How Many North Poles, Computer Trivia, Sea Turtles, Ultraviolet Light Detection. Christian explains how pressure is built up inside a pressure cooker. Mr. Wizard blows up a balloon by placing it on top and they watch it expand as steam flows into it.