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Knex 78890 - Education Amusement Park Experience Teachers Guide Manual

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LESSON 8
8: U
8: U
NDERSTANDING
NDERSTANDING
D
D
ISPLACEMENT
ISPLACEMENT
www.knexeducation.com
In Groups
2. Distribute the necessary K’NEX Education materials for building the Scrambler. Directions for
construction can be found in the Building Instructions booklet and on the CD-ROM, both of which
a
re included in this set.
3. Before they turn on the ride, ask students to:
a. Examine the gear structure and make predictions about which smaller arms, those of shorter
length (yellow) or those of longer length (red), will turn faster.
b. Record their predictions and reasoning in their journal. Students should use the terms “gears,”
“rotation,” and “revolution” in their explanations.
c. Predict the number of times each of the seats attached to the different sized smaller arms will
rotate during one rotation of the large arms.
4. Students will test their predictions by turning on the ride and observing which seats turn faster
(complete more rotations), during one rotation of the large arms:
a. those attached to the smaller arms (yellow) of shorter length, or
b. those attached to the longer arms (red) of shorter length
Teacher’s Notes
• Suggest that students place a piece of masking tape on one of the large arms and one on each
on each of the two types of short arms. These pieces of tape will make the counting process
much easier.
Whole Class
5. Students will share their findings related to the motion of the smaller arms. Teachers may want to
focus the students’ attention on questions such as:
a. Which arm would you want to be on to travel the fastest/slowest?
b. Why do you think the different arms turned at different rates?
6. After this discussion, invite students to record written responses to the following in their journals:
a. How many times did the small arms with yellow Rods turn as the large arms made one
complete rotation?
b. How many times did the small arms with red Rods turn as the large arms made one
complete rotation?
c. How did the arrangement of gears on each of the small arms cause these results?
ACTIVITY 2: WHICH SCRAMBLER SEATS TRAVEL FURTHER?
In Groups
1. Ask students to predict which seats travel the greatest distance in their small circular paths as the
large arms make one complete rotation:
a. Those attached to the yellow arms (smaller arms of shorter length).
b. Those attached to the red arms (smaller arms of longer length).
They should enter their predictions in their journals.
… 54 …


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