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1. As you turn the crank on your Eggbeater,
look at the direction the Gears turn.
Would this tool work as well if it used
spur gears? Explain.
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a.
Fill a bowl or laundry tub about
6 centimeters deep with water.Then, add
a small amount of dish soap. Use a spoon
to stir the mixture.Time how long it takes
to cover the surface of the water with
bubbles.
b.
Now, start over with new water and
soap.Try stirring the mixture with your
Eggbeater. How long does it take to cover
the water surface with bubbles when you
use the Eggbeater? Which tool is best for
the job? Why?
3. Observe the rotating motion of the
beaters when you turn the crank.
Do the beaters turn in the same or
opposite directions? If the beaters turned
differently, do you think they would work
better? Why or why not? Explain
your answer.
4. Write an ad describing this handy,
time-saving tool.Then illustrate and design
an advertisement for your Eggbeater.
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1. The arrangement of the crown gears
(vertical and horizontal) and the two pairs
of Gears make the beaters turn in
opposite directions. Using spur gears
would probably not work as well because
then you would have to do your turning
in a horizontal plane, at the top of the
Eggbeater where you hold it, which would
be awkward.
2 The Eggbeater should allow students to
whip up soap bubbles much faster than
they could using a spoon. One reason for
this is because the large Gears attached
to the crank make the small Gears turn
the beaters very fast.Also, the two
beaters turning in opposite directions
make the soapy water churn and mix well.
3. The beaters turn in opposite directions.
If the beaters turned in the same direc-
tion, the Eggbeater would still work but
having them turn differently makes mixing
faster and easier. Encourage students to
experiment with the Eggbeater to
determine how they could make the
beaters turn in the same direction to see
how effective they are.
4. Have magazines or catalogs accessible to
students so they can each get ideas about
how to write advertisements for their
Eggbeaters.Their ads might include
illustrations, recipes, quotes from “satisfied
customers” or even impressive technical
jargon. Encourage them to be creative and
think of other uses for the Eggbeater.
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ANSWERS
QUESTIONS
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Summary of Contents for Education Simple Machines Deluxe GEARS
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