Which Weighs More . . .

Which do you think weighs more, 101 pieces of popped or unpopped popcorn? We made predictions and then investigated. More students made predictions that unpopped would weigh more, even though the popped popcorn took up a lot more space. We counted out both forms of popcorn and weighed them. Our results told us that the

unpopped weighed more. With a little more investigating, here is what we learned. The unpopped popcorn has moisture/water in it. When popped, the heat causes the water to come out as steam. This takes weight out of the popcorn.