Magnetism

Magnetism Coronet Instructional Films Precocious boy, Joe, shows & discusses w/ neighbor Alice his telegraph machine he built in backyard; takes her into workshop to explain magnets. Shows types of magnets, poles of magnet & compass. 12:12:43 Alice discovers north & south pole of magnet to control movement; picks up iron filings w/ magnet. Joe magnetizes hacksaw blade; demonstrates what a magnetic field looks like w/ iron filings sprinkled on sheet of glass over magnet. 12:15:39 Animated drawing of earth’s field of force. 12:16:02 Joe explains telegraph system w/ batteries & closed circuit - animated diagram of telegraph showing electromagnet. 12:18:28 Joe shows Alice electric motor he built - diagram w/ reversed poles - attaches galvanometer & batteries to electric motor to create electricity - lightbulb. Recap of magnetism’s key points. 12:21:24 Various motors, electric train past under power lines. Science - Physics; Scientific Experiments; Educational Film; Elementary Project; Junior High School Students; Dialogue; Elitism; Sexism;