In this demonstration, laser light is bent as it travels through a sugar (or salt) solution of varying concentrations.
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Guidelines for Constructive Demonstrations/Activities
Categories: Lab/Student Activity, Teacher Demonstration
The demonstrations/activities in this resource have been designed to challenge students' thinking as well as initiate lively classroom discussions that support constructivist learning. These short... read more
Teacher Demo: Potato Candle
Categories: Teacher Demonstration
In this demonstration, a peeled potato is cut into the form of a candle and an almond slice is used as the candle’s “wick.” The teacher lights the almond slice on fire and it burns. The... read more
Teacher Demo: Rusty Balls
Categories: Teacher Demonstration
The thermite reaction is very exciting, but also extremely dangerous. Iron has a melting point of over 1500oC and the reaction can reach temperatures of over 2000oC. This reaction was once used to... read more