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# Variable Basics Ppt

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Science Fair Prep

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• 1. What is a Variable?
• 2. Types of Variables
• Manipulated Variable
• The condition that will be changed in an experiment.
• 3.
• Responding Variable
• The condition that will be measured in an experiment.
Types of Variables
• 4.
• Controlled Variables
• The conditions that are kept the same (unchanged) in an experiment.
Types of Variables
• 5.
• Identify variables for the following experiments.
• You can do it!
Practice
• 6.
• Does changing the temperature of a ball affect the height the ball will bounce?
Testable Question #1 Hot Cold
• 7. Identify Variables #1
• Does changing the temperature of a ball affect the height the ball will bounce?
Cold Hot Manipulated Variable Responding Variable
• 8.
• Controlled Variables:
• * Same ball
• * Dropped from the same height
• * Dropped onto the same surface
• * etc…
Identify Variables #1
• 9.
• Does changing the color of light affect the growth rate of plants?
Testable Question #2
• 10. Identify Variables #2
• Does changing the color of light affect the growth rate of plants?
Manipulated Variable Responding Variable
• 11.
• Controlled Variables:
• * Same type / size of plant
• * Same wattage of bulb
• * Same amount of water
• * Same soil
• * Light on for the same amount of
• time
• * etc…
Identify Variables #2
• 12.
• How does the size of a parachute affect the time it takes a toy
• hippo to fall 10 feet?
Testable Question #3
• 13. Identify Variables #3
• How does the size of a parachute affect the time it takes a toy hippo to fall 10 feet?
Manipulated Variable Responding Variable
• 14.
• Controlled Variables:
• * Same hippo
• * Dropped from the same height
• * Same parachute fabric
• * Same length of strings on the parachute
• * etc…
Identify Variables #3