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Red Flags
Adult supervision is required when children
use sharp objects. An adult should supervise the children’s
poking holes in the carton and hammering nails into the can.
Questions to Ask
How is the flow different? Can the children draw pictures of the
water flowing out of the 3 different holes?
Science Connection
Water pressure is the force of the weight of water pushing on the
water below it. Water at the level of the top hole has the least
water pushing down on top of it so it has lower pressure. Water
at the level of the bottom hole has the most water on top of it
creating more pressure. The amount of pressure determines how far
horizontally the stream of water goes from the container.
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Why
To be a hydrologist and study the flow of water.
What You Need
An empty milk carton
3 Sharp pencils
Water
Sink
What to Do
Using a sharp pencil, carefully poke a hole into one side of the
empty container. Do not remove the pencil. Using the two
remaining pencils, poke two more holes on the same side—one
above the first hole and one below it. Remember to leave the pencils
in the holes. Fill the carton with water and place it on the edge
of the counter—with the holes aiming toward the sink. Pull
out the pencils one at a time.
Vocabulary
Liquid: Feels wet, takes on the shape of the container it is in.
Liquids flow.
Stream: A current or flow of water
Try This
Poke holes in the different sides. What happens?
Can you poke holes into the carton when it is filled with water?
Which is more fun—when it’s empty or when it’s
filled? Why?
You might want to color the water.
Using a hammer and nails, the children can make holes in an empty
coffee can. Fill it with water and see what happens. Try covering
with the plastic lid. Does it make a difference? Why?
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