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Materials
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- 9- x 12-inch sheets of construction paper
- masking tape
- cardboard squares
- popcorn
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1. Divide the class into pairs. Give each pair
two 9- x 12-inch sheets of construction paper (color doesn't matter). Have
them roll each sheet into a tube in two different ways — a tall, thin
tube (side to side) and a wide, short tube (top to bottom). Have them use
masking tape to fasten the ends together so that the tube holds its shape,
but make sure they do not overlap the ends too much — they want as
large a tube as possible for the paper they use. Then have them tightly
tape a cardboard square to form a base that will close off the bottom and
allow the tube to stand up.
 2.
Have children examine the two tubes and then guess which one holds more.
Some children may guess that since the tubes were formed from the same-size
sheets of paper, they will hold the same amount. Others may guess that
one tube or the other will hold more. Tally the guesses before children
investigate.
3. Provide popcorn. Have children fill one
tube to the top. Using that filled tube, they can pour it into the other
tube to figure out whether it holds more, less, or the same amount of
popcorn. (If pouring overflows the second tube, the first one is bigger.)
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