Powerboat (Baking Soda)
February 24, 2016
-run a bath for the boat
-puncture a hole in the non-lid end of an empty bottle of water and tape around the edges to make it air tight
-pour a bit of household vinegar into the bottle
-wrap some baking powder in ktichen roll
-place the powder/roll through the lid opening close the lid and tip the bottle to combine the powder with the vinegar
-place your powered boat onto the bath water and watch it move
-the acid neutralizes the carbonate, creating carbon dioxide gas that rushes out of the straw and propels the boat using Newton's third law! You could even work a discussion of buoyancy into the mix.
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Great mental calculation exercise for all age and it will be fun.