When is a Glass of Water Really Full?
It's often hard to tell. A glass full of water is like a bus at rush hour-you
can usually squeeze a bit more into it. Surprise yourself by finding out how
much more you can put into a full glass of water.
You'll need:
- a glass
- some food colouring
- some coins
- Fill a glass right to the top with water coloured with a few drops
of food colouring.
- Gently start dropping coins into the water. (It's best to hold the
coins on edge and slip them into the water.) You'll notice that the
top of the water bulges out above the top of the glass. How many coins
can you add before the water overflows?
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Excerpt from The Jumbo Book of Science
by the Ontario Science Centre, used by permission of Kids
Can Press Ltd., Toronto.
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