Water on the penny

Shane and Daniel wondered about the effect of different sides of the penny on the number of water drops that fit on the penny. They did the following investigation.

Question:

How do different sides of the penny (heads or tails) affect the number of water drops that fit on the penny?

Hypothesis (prediction):

The tails side of the penny will hold more water drops because there are more crevices on the tail side of the penny to hold the water.

Materials:

Dropper

Water

Penny

Procedure:

1.      Set up the pennies with one heads side up and one tails side up.  Fill the dropper with water.

2.      Drop water onto each penny one drop at a time until the water runs off the penny.

3.      Measure and record the number of drops of water that stayed on the penny as Trial 1.

4.      Repeat steps 2 and 3 for the tail side of the penny.

5.      Repeat steps 1 through 4 two times as Trials 2 and 3.

6.      Calculate and record the average number of water drops on the penny for each side of the penny.

Data:

 Side of the penny vs. number of drops of water Side of penny Drops of water (number) Trial 1 Trial 2 Trial 3 Average heads 7 32 48 29 tails 29 24 25 26

Water on the penny

Write a conclusion for the investigation.

In your conclusion, be sure to:

or Describe whether the prediction/hypothesis was correct.

• Include supporting data from the data table.
• Explain how these data support your conclusion.

 Question:

 Conclusive statement “lowest” supporting data “highest” supporting data Explanatory language