gator science

active adventures in lower school science

Warm vs. Cold Alka-Seltzer Rockets

on April 11, 2014

This week the third grade class tested homemade Alka-Seltzer rockets in science.  The students used the old-fashioned film canister and filled it with a teaspoon of water and half an Alka Seltzer tablet.   The lid was closed quickly and inverted on the concrete porch outdoors.  The carbon dioxide was released in the reaction and thanks to Newton’s third law the film cannister flew 10 to 20 feet in the air.  We found that the cold water took longer to react than the warm water.  Students discussed how warmer molecules move faster and spread apart helping to increase the speed of the reaction.  The experiment was a great excuse to enjoy a warm spring day outdoors wearing our very fashionable science goggles.

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