The Mystery of the Floating Can
Density is how much mass a material has for a given volume. Objects that are more dense have tightly packed molecules. Floating occurs because objects push aside a certain amount of liquid. If an object pushes away more liquid than its weight, it will float; otherwise it will sink. In the book, The Mystery of the Floating Can, Freddie plays a science trick on his friends Bert, Liza, and Herman.
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