How many drops of water will fit on a penny?
We made some observations regarding the size of the penny as well as how much surface area 1 drop of water covered.
Step 2: Formulate your hypothesis.
Most students guessed 5-10 drops. However, 4th graders have not learned about surface tension and cohesion. So much to their surprise, the number of water droplets was much higher than anticipated. Some had over 30 drops fit on their pennies.
I love it when the kids get excited about their class work. I love it when they laugh and enjoy their discoveries. Today's experiment was filled with both.
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