How many drops of water can we fit on a NZ coin sized $2 $1 50c and 20c?
Research I researched the topic and found out that you can get from 20-100 drops of water on these coins depending on the size of you dropper and drops.We realized that it also depended on which side of the coin you did in on because of the ridges in the patterns and to remember which side we test.
Hypothesis After researching my topic I made an estimate or hypothesis to what I think my answer will be. I estimated that the $2 coin would get somewhere from 70 to 90 drops, $1 coin 65 to 80, 50c 40 to 60 and the 20c will get somewhere from 25 to 45. I also thought that it would be the tails that would be able to hold more than heads.
Test Hypothesis/Procedure
- Gather your materials(coins, cup of water, tissues and dropper)
- Find a smooth surface to place your coin onto.
- Using the dropper suck up water
- Drop the water onto the coin and repeat
- Count your drop and record the answer when it spills.
Record the Data. At the end of my experiment I had observed and recorded my information and compared it to my hypothesis and the results were close. My $2 coin got 83 drops which was quite close to my hypothesis. I was not surprised considering that I have done a test of the safe type of coin before and got a very similar result. The 1$ coin was not as close to my estimate as I expected. With 59 drops able to fit on the coin.Because we did both sides on the fifty cent coin we were also able to record which side could hold more the answer to this was the tails holding 55 drops and the heads holding 44.
Analysis: My hypothesis was quite close coming at only 13 above my minimum and 7 below my maximum for the $2. Although my first hypothesis was correct my second was quite low coming 6 drops below my minimum. Both of the 50c coins were very close to my estimate with the tails holding only 5 below my maximum and the heads holding 4 above the minimum.
Conclusion:From this experiment I learnt all about how to record your information and how to lay out a successful experiment.I was happy with my hypothesis and results and was surprised by some of the drops. It was exciting to see how many drops we could get onto our coins and having turns doing all the different jobs.
My next question for further investigation would be, “Would the tails on the $2 side hold more than the heads side, like with the 50c coin?”
– Caitlin