Simple Changes in Matter

Simple Changes in Matter Coronet Instructional Films Teenage boy rolls boulder into stream w/ splash on summer day, looks pleased w/ himself. Narrator advises him to look around for other changes in matter. Boy looks, CUs trees, fast-flowing river & eroding riverbank. 00:45:24 Boy onto paved country road - pokes at sticky tar oozing from crack in road. Narrator points out sagging telegraph wires. 00:46:13 Laboratory experiment w/ wire heated by bunsen burner making it sag. Title re: heating & cooling solids - expansion & contraction. 00:47:57 Boy approaches metal bridge - CU expansion joint fitted by engineers to allow for hot weather. Speedboat on lake; fades into lake in winter, iced over; fades back to summer. 00:49:27 Ice heated in lab - CU melting, turning into gas. Liquids, solids, gas. 00:50:41 - end. Mostly unusable - film rolls / out of rack. Few usable shots inc. boy picking up rusty pen knife / pocket knife. The End. Erosion; Science - Physics / Chemistry;1950s; 1953; Educational Films; Childhood; Summer Vacation; Rural US; NOTE: poor sound. NOTE: One continuous minute sold at per reel rate.