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PBS
Pbs Learning Media: Zoom: Building Simple Machines: A Glass of Milk, Please
ZOOM video segment in which the cast shows how the 34 steps in their Rube Goldberg invention use everything from gravity to carbon dioxide gas in order to accomplish one simple task: pouring a glass of milk. [5:05]
PBS
Pbs Learning Media: Building Simple Machines: Plant Quencher
In this video segment from ZOOM, Jillian explains how her simple machine uses marbles, levers, flowing sand, and a spinning wheel to water a plant. [1:16]