The kids wondered if this were true. They set out to find out. Luckily, we had a dragon-coin-bank filled with coins. They separated out a pound of quarters and a pound of dimes. Then they added up the monetary worth of the coins. Their results showed that a pound of quarters and a pound of dimes equal approximately the same amount of money (about $20).
The numbers came out to be a little different, but very, very close. The kids new this would happen, but seeing it proven through their own actions was exciting for them. They came up with their own ideas as to why the two pounds of coins might not be worth exactly the same amount:
1: the scale isn't precise
2: the coins are all used, so some might be too old and thus "rubbed" to be less weight than a new coin
3: perhaps all the coins weren't made of the same materials, depending on when they were minted
It's definitely times like these when I see "it all working" the way it's supposed. They started with a question, a curiosity, or theory. They figured out how to investigate. They came to a conclusion. They accounted for margins of error. This experience was worth a lot more.
(written July 31, 2015)
