Race a Speedboat
Can you make a paper boat race across the water just by gently touching the surface of the water?
Hypothesis The liquid in the washing liquid will make a wave big enough to push the paper boat along.
Coloured card, washing up liquid, pencil or sharpie, scissors, large container of water.
Get a big container full of water and put a small dab of washing liquid on your finger. Put your boat in the water and place your finger in the water behind your boat.
The boat moved.
ConclusionThe washing liquid spread out and pushed the paper boat.
Short Experiment to Follow Up
Make Metal Float
Gently place a paperclip on the water’s surface.
The paper clip will float because of it’s weight.
|The paper clip will float, just you wait.|