Water Experiments

Try one of these simple experiments

1    Put a penny on a piece of paper. With a plastic dropper or a toothpick, place a single drop on the penny. Predict how many more drops will fit on the penny before the water spills off the penny onto the paper. Now add one drop at a time until the water overflows. How many drops did it take?

blank penny
Dry Blank Penny
Adding water to a penny one drop at a time
Adding one drop of water
Penny with one drop of water
One drop on the penny.
water on penny
How many drops did it take?

Variations of the experiment

  • Wash the penny.
  • Heat the penny.
  • Cool the penny by placing it in the freezer for 10 minutes.

2   Pour enough water into a flat-bottomed bowl to cover the bottom. Fill a small jar with sand and place it in the bowl. Loosely cover the top of the bowl with plastic wrap. Secure with a rubber band. Place a small rock on top of the plastic directly over the jar. Place the bowl in direct sunlight or under a lamp. After one hour, observe the bowl and plastic wrap. What do you see? What are some possible explanations?


3   Fill a glass with ice and water, being very careful not to spill any water. Set the glass aside for 5 minutes. Observe the outside of the glass and the surface that it is sitting on. What do you see? What are some possible explanations?


4  Place a plastic bag over a limb on a tree.  Make sure you are careful not to damage the leaves.  Leave it there overnight.  Check it the next day.  What do you see? What are some possible explanations?