New Zealand Coin Experiment
Question:how many drops of water can fit on a NZ coin.
Research topic:Research told me that 40 droplets of water can fit on the top of a small coin, and 75-120 for a big coin. The coin has to be dry and on a flat surface to work
Hypothesis: I wrote down on my “the scientific method” paper that we would get 40 on the smaller coins and 190 for the larger coins.
My group photo!
Data:
| $2 | On the two dollar coin we got 83 drops of water | I guessed we would get 125 |
| $1 | On the one dollar coin HEADS we got 59 droplets | I guessed we would get 85 |
| 50c | On the 50c heads we got 44 | I guessed 150 |
| 50c | On the 50c tails we got 55 | I guessed 150 |
| 20c | On the 20c heads we got 31 | I guessed 50 |
Analysis: I thought that we were going to get a bigger syringe for bigger drops. So that means I thought that we would fit bigger drops, but in reality we only fit a very small amount of small drops.
Conclusion: During this experiment many people got things wrong and things right, but overall I know now that coins actually don’t hold as much water as you think. I believe that the coins couldn’t hold as much water because the impact of more drops made the water spread out more. This causes the water to slip off the sides. Sometimes small ridges can interfere with how that water will sit on top of the coin and that also impacts the results.
(Photo of a coin with the water going on!)
Question for further investigation: I would like to know how many drops of water could fit on a coin if there was to be a small earthquake simulator under the coin while you drop the water on.