This picture shows 200 kernels of popcorn in a 1000 mL graduated cylinder and 200 pieces of popped popcorn in another. Popped popcorn typically fills about 40 times the space it did when it was just a ...

Most rain gauges just use a graduated cylinder to capture water as it falls from the sky. That will give you a reasonably accurate measure of how much it rained, but it tells you nothing about how ...