Since the sides of a penny
are raised up, the penny acts
as a tiny pool that can be
filled with water.

Items within the pool take up
space that water can fill.

Since both sides of a penny
have different pictures,
maybe the amount of raised
surface is different.
Extra Credit
Which Side Of A
Penny Will Hold The
Most Water, Heads
Or Tails?
1) What is meant by raised surface?
2) Explain what building is on the back of a penny?
3) Older pennies have a wheat (plant) design on them. Will this
change your results?
4) Why is there a building on the back of some pennies?
My Science Notebook
has a graph,
experiment D sheet, a
write up using the
scientific method and
a daily summary for
each day that I worked
on that experiment.
Problem: Which side of a penny will hold the most water, heads or tails?

Hypothesis: (my opinion) Heads seems to have less STUFF on it. More
water can probably fill that side.

Materials : water

Equipment: pennies, tray, sponge, dropper, desk, cup

step 1) Put dropper into a cup of water and squeeze the air out. Water will
fill the dropper.
step 2) Put a penny on a tray and hold a ruler next to it.
step 3) Hold a dropper at the desired height of 1 inch
step 4) Squeeze dropper letting drops of water fall on the penny.
step 5) Count how many drops fit on the penny before it overflows. (this is
step 6) Dry penny and repeat steps for the next trial.
step 7) Now turn the penny over to the other side and repeat all the steps,
drying the penny between trials.

Results: (these are sample results)

Side guess 1 2 3 A
Heads 11 12 15 9 12
Tails 5 2 4 0 2

Conclusion: (why your results are the way they are)
Heads seems to be able to hold more water. I feel this is due to the fact that
there are less things sticking up on the heads side of the penny.

Variables: (things that cause changes)
Someone hit my arm, there was splashing, the eyedroppers were different
sizes, people were fooling around at my table, sometimes the penny that I
needed was not in the box.
Scientific Method Write-up
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