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1. With the help of an adult, start your Food
Mixer by plugging the cord into the gray
K’NEX Motor. How are the Gears in this
model different from the Gears in the
K’NEX Eggbeater model? Describe the
difference in writing.
2. If you changed the blue Gears on the shafts
of the beaters to larger Gears, would the
beaters turn faster, slower or at the same
speed? Predict what would happen.Write
down your prediction and then experi-
ment to find out.
3. Try using your Food Mixer to stir up a
bowl of jelly beans. Put jelly beans of two
different colors in a bowl, with the colors
separated on each side of the bowl.
Watch how the two beaters turn in
opposite directions and mix the colors
together.Then, remove one beater and try
mixing with a single beater.Which way
works better – using one or two beaters?
Why? Explain your answer. If the beaters
turned in the same direction, would the
Food Mixer mix the jelly beans as well?
Experiment with the Mixer design and
function to find out.
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* CAUTION:
Supervise students when they
use the K’NEX Motor.
Plug the transformer
into the wall yourself and let them connect
the small plug to the Motor. Make sure the
Motor is not used near water and that
students have dry hands when handling
the plug.
1. In the Food Mixer, a Worm Gear turns
the axle that holds the upright Gears; in
the Eggbeater, you turn the crank to turn
the upright gear axle.The horizontal
Gears (on the shafts of the beaters) turn
the same way in both models.
2. If you increase the diameter of the Gears
at the top of the beater shafts, the beaters
will turn more slowly. Encourage students
to think about the problem and make a
prediction before they experiment to find
out the answer. Refer them to the
“What’s the Mechanical Advantage?”
Reference Sheet.
3. When students try mixing jellybeans, use
two or more colors to really bring out
the mixing process. Have several students
in a group watch as the colors mix
together. Encourage them to see how the
beaters turning in opposite directions
really churn up the jellybeans and mix
them better than a single beater does.
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ANSWERS
QUESTIONS
1-888-ABC-KNEX
WARNING:
Important note:
Be extremely
careful whenever using electrical devices.
Teachers should monitor student activities at all
times, and should examine devices before use.
Summary of Contents for Education Simple Machines Deluxe GEARS
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