Lab: Water Drops on a Coin
Look over the following guidelines and come up with a
lab write-up of your own. You may use the lab report
template to put your report together.
Question: How many drops of water will fit on each coin
before the water rolls off
If I put __ drops of water on a quarter, __
drops of water on a penny, __ drops of water
on a nickel, and __ drops of water on a dime,
then the water will roll off the edge.
Materials: List all necessary materials
Procedure: Read over the procedure. Then use your
own words to create numbered steps to follow.
1. Use an eye dropper to drop water onto a
coin until the water rolls off of the edge.
2. Record the exact number of water drops
that are required to cause the water to roll
off of the coin.
3. Repeat the experiment three times for each
4. Then average your results (add up the
three trials for each coin and divide by
Data: Set up a table like this in your report.
Record your results here.
Coin Trial 1 Trial 2 Trial 3 Average
Graph: You also need to make a bar graph for the
average number of drops for each coin. Coins
should go on the x-axis and number of drops
should go on the y-axis.
1. How many drops did it take until the water
rolled off of each coin?
2. Were your predictions close to your
3. Explain why they were or weren't close
4. Name 2 sources of error