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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
57
Am usement Par k Ex perienc e
9. Students should prepare two graphs to present their data. They should connect the points of their
g
raphs using smooth curves rather than just connecting the dots.
a. Graph #1: for the seat attached to a yellow Rod:
i) x-axis – number of teeth moved along the large yellow Gear: 10, 20, 30, 40, 50, etc.
i
i) y-axis – displacement values that correspond to the teeth numbers above.
b. Graph #2: for the seat attached to a red Rod. Follow the same graphing format as used above.
10. Students should describe their results in their journals.
a. Were they able to determine any patterns in the data from their data table?
b. Were they able to determine any patterns in the data from their graphs?
c. How are the two graphs similar? How are they different?
d. What information do the graphs provide about the motion of the seats?
Whole Class
11. Students should share their graphs and discuss what happened with the displacement of each type
of seat as the large arms rotate.
a. What patterns emerged as the data was plotted? Was the pattern obvious when the data table
was reviewed?
b. What do the patterns suggest?
c. Can you think of other systems that might produce a similar pattern?
Teacher’s Notes
The students’ ability to answer 11c above will be dependent on their prior knowledge. Please provide
other examples if necessary.
ASSESSMENT
• Student notebooks and their explanations.
• The teacher can also have small group discussions with the students regarding the motion and path
that each small arm takes.
WEB SITES
http://homepage.mac.com/teast/scrambler.html
Animation of how a scrambler works.
http://www.mos.org/sln/Leonardo/InventorsToolbox.html
This web site has pictures and descriptions of different gear types.
… 59 …


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