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  • S03E01 Pepper's Ghost, Creek Transplant, Card Trick, Oscilloscope Alarm, Vapor Trail, Balloon Pressure and more

    • October 10, 1985
    • Nickelodeon

    Pepper's Ghost - Explains how one can use angles between light and glass to create the illusion of one image transforming into another with pepper's ghost. Free Fall Water - Demonstrates free fall with water remaining in a bucket with holes. Creek Transplant - The thought, hard work, and care that went into rerouting a river in Colorado. Hidden Order Card Trick - Shows how to organize a deck of cards so that a desired card is revealed after drawing and replacing a card for each letter spelling that card out. Oscilloscope Alarm - Explains with an oscilloscope and sound generator how high-frequency (inaudible) sound waves can make burglar alarms. Vapor Trail - Describes how condensation from the disturbance of atmosphere by an airplane can form clouds behind it. Balloon Pressure - Demonstrates how the elasticity of a balloon with less air may counter-intuitively force air into a balloon with more after creating a barometer with fluid, valves, and balloons.

  • S03E02 Ash, Moldy Bread, Oscilloscope Sugar Crystals, Underwater Park and Radiometer and more

    • November 2, 1985
    • Nickelodeon

    Ash Minerals, Mold, Oscilloscope Timer, Sugar Crystals, What is This, Spool Roll, Underwater Park, Radiometer Challenge. ASH MINERALS - Michael holds a piece of newspaper with tongs over a candle. After the paper has burned, Mr. Wizard explains what is left behind are the minerals. MOLD - This invasion can start from one tiny spore, so small it's invisible.

  • S03E03 G-Forces-Ocean, Plants that Eat Animals, Avalanche, Speaking Computer, Star, CO2 Extinguisher and more

    • December 18, 1985
    • Nickelodeon

    G-Forces Ocean Motion, Large Washer thru Small Hole, Plants that Eat Animals, Floating Cork, Avalanche, Speaking Computer, Star Trails, CO2 Extinguisher. At an amusement park Stacey and Mr. Wizard discuss how she feels while on a ride that is, in effect, a giant swing. Mr. Wizard explains G-forces as it relates to airplane pilots in dives. He explains G-Force & Ocean Motion.

  • S03E04 Ultrasonic Cleaner, Manhole Covers, Jar over Candle, Bicycle Gears, Oysters, Balloon Bottle and more

    • January 3, 1986
    • Nickelodeon

    Ultrasonic Cleaner, Manhole Covers, Jar over Candle, Bicycle Gears, Support and Balance, Harvesting Oysters, Balloon into a Bottle. ULTRASONIC CLEANER - Mr. Wizard and Christian discuss supersonics and ultrasonics. Several demonstrations ensue. MANHOLE COVERS - You've seen manhole covers on the street many times.

  • S03E05 Potato Battery, Bleach, Dot Puzzle, Hurricanes, Flying Simulator, Microscope, Radar Gun and more

    • February 17, 1986
    • Nickelodeon

    Potato Battery, Connect the Dots Puzzle, Hurricanes, Flight Simulator, Water Drop Microscope, Radar Gun. AJ notes that a quartz clock is not working because there is no battery. Mr.Wizard shows AJ how to create an electrical current using copper & zinc electrodes, wires, salt, bleach, and a potato.

  • S03E06 Delicate Balance, Potato Pop Gun, Zebra, Density Float, Colored Flames in Fireworks and more

    • March 12, 1986
    • Nickelodeon

    Delicate Balance, Potato Pop Gun, The Zebra, Density Float, Missing Piece of Cake, Opposite Threads, Colored Flames in Fireworks. Mr. Wizard shows Stacey how delicate a balance is by waving his hand over it. The balance registers the force of the moving air. They study several sensitive weight measurements.

  • S03E07 Sound on Light Beam, Checker on Table, Wired Hockey Players, Optical Illusions, Aluminum and more

    • April 22, 1986
    • Nickelodeon

    Sound on a Light Beam, Optical Illusion, Wired Hockey Players, Balloon and Marshmallow in Vacuum, Merry-Go-Round Water Drain, Hole in Bottle, Diamond Find, Aluminum Foil Cleans Silver. Mr. Wizard tells Stacey she is going to send sound over a light beam! He shows her a record player with sound coming from the speaker. The sound is recorded on the grooves.

  • S03E08 Mousetraps Chain Reaction, Asparagus, Magnify 10X, Air and Water Streams and more

    • May 11, 1986
    • Nickelodeon

    Mousetrap Chain Reaction, Asparagus, Magnify, Optical Range Finder, Pin Into Balloon, Fostering Parents for Birds, Air and Water Streams. Mr. Wizard has prepared a large transparent box that contains 96 mousetraps which are set and ready to spring closed. There are two ping-pong balls on each trap.

  • S03E09 Ultra Violet Light, Bottle Balloon, Sandpaper, Homemade Motor, River Modeling, Mirror signal and more

    • June 7, 1986
    • Nickelodeon

    Ultra Violet Light, Bottle-Balloon Steam, What's This, Washer Pick Up from Glass, Homemade Motor, River Modeling, Mirror Signal. Mr. Wizard and Darren look at a rock under normal light and under ultraviolet light from a special lamp. They discuss the word ultraviolet. Darren describes ultra as very Violet and violet sort of like purple

  • S03E10 Paper Movie Machines, Dolphin Language, Heat Expansion, Petrified Forest, Mobile Challenge and more

    • July 21, 1986
    • Nickelodeon

    Paper Movie Machines, Dolphin Language, Heat Expansion, Rope on Wrist, Petrified Forest, Paper Tear, Killdeer Act, Mobile Challenge. Bibi watches Mr. Wizard swing a light in a circle to produce a streak of light. He explains that the so-called persistence of vision is the reason motion pictures create the illusion of movement.

  • S03E11 Steam Breaks Container, Navel Orange, Fresnel Lens, Balloon Rocket, North Pole, Sea Turtles and more

    • August 11, 1986
    • Nickelodeon

    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.

  • S03E12 Potassium Nitrate, Wood into Paper, Snow Melts, Telescopes, Surface Tension, Balancing and more

    • September 18, 1986
    • Nickelodeon

    Potassium Nitrate, Wood Into Paper, Snow Melt, Telescopes, Surface Tension Tricks, Hospital for Statues. He holds up a jar of white powder and asks her to identify the elements listed on the label: carbon, oxygen, and hydrogen. He identifies the powder as table sugar and places a teaspoon of it onto the lid of a jar.

  • S03E13 Smoke Rings, To Dig a Mine, Hot vs. Cold Water Bottles, Card Trick, Computer, Alligators and more

    • October 1, 1986
    • Nickelodeon

    Smoke Rings, To Dig a Mine, Hot vs. Cold Water Bottles, Three Pile Card Trick, Computer Reaction Timer, Alligator, Volume Challenges. SMOKE RINGS: As a few drops of milk sink in a glass of water, Chris sees rings which Mr. Wizard identifies as vortex rings. TO DIG A MINE: Deep inside that Colorado mountain, there’s a large supply of valuable ore.

  • S03E14 Fun with Sparks, Burping Bottle, Crystal Garden, Why Do Balls Curve, Face Mask, Mirrors and more

    • November 21, 1986
    • Nickelodeon

    Fun With Sparks, Cockroach, Burping Bottle, Crystal Garden, Monitor Expedition, Why do Balls Curve, Face Mask, Mirror Micro Meter. Christian is watching long sparks jump between the points of two ice picks. Mr. Wizard explains that they are going to investigate high-voltage electricity that has enough pressure to jump through the air.

  • S03E15 Iron Clad Magnet, Walnut, Catenary Arch, Scientific Noise, Rubber Band Code, Torsion Balance and more

    • December 6, 1986
    • Nickelodeon

    IRON CLAD MAGNET: Ashley uses an electromagnet Mr. Wizard has made. They connect a battery and Ashley picks up a pile of paper clips with the electromagnet. CATENARY ARCH: Maria places blocks together on a board to form an arch on its side. SCIENTIFIC NOISE: Mr. Wizard briefly explains to Nicola that an oscilloscope is a device to make waves visible. RUBBER BAND CODE: Bibi examines a rubber band with black marks on it that are a secret message. Mr. Wizard stretches it to expand the marks into letters. She reads a secret message on the rubber band. MONO LAKE: A big, blue lake in the dry desert of eastern California. Despite its high salt content (saltier than the ocean), Mono Lake has supported abundant wildlife for thousands of years. TORSION BALANCE: Mr. Wizard and Leila look at a metal strip suspended horizontally with two C-clamps attached to the end. STEAM ENGINE RUNS WITH C02: Mr. Wizard shows Ashley the various parts of a steam engine.

Season 4

Season 5