1. INSANER Variables 2. Compare your catapult designs with your neighbor.
Objective: To explore the design of a catapult in order to determine the variables that can affect the launch distance.
Core Question: What can affect the distance a catapult launches a projectile?
Drill: 1. Take out yesterday’s dittos.
2. Compare your catapult designs with your neighbor.
3. Determine how you can improve your design.
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2. INSANER Variables Discussion: Catapult Designs Sharing the prototype.
Lets examine the parts!
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3. INSANER Variables
List some possible independent variables for this investigation.
Angle of the base
Length of the lever arm
Angle of the lever arm
Type of projectile holder
Thickness of the rubber band
Type of fulcrum bar
Fulcrum height
Type of lever arm
Type of projectile
Height of tension bar
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4. INSANER Variables
What is the dependent variable in this investigation?
The distance a projectile is launched
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5. ***You will receive grades as both a group and as individuals.
INSANER Variables
Group/Independent Variable Selection
Draw a card.
Leave it face down.
All students with the same number are a team.
The person with the spade is the captain.
***You will receive grades as both a group and as individuals.
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6. INSANER Variables Ditto: “Organizational Steps”
1. Complete #1 and #2 for your assigned variable.
2. Enter the constants into the chart in #3.
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7. INSANER Variables Homework:
Write a set of procedures for making a peanut butter and jelly sandwich.
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