Download - Variable Basics Ppt
What is a Variable?
Types of Variables
• Manipulated Variable
The condition that will be changed in an experiment.
• Responding Variable
The condition that will be measured in an experiment.
Types of Variables
• Controlled Variables
The conditions that are kept the same (unchanged) in an experiment.
Types of Variables
Identify variables for the following experiments.
You can do it!
Practice
• Does changing the temperature of a ball affect the height the ball will bounce?
Testable Question #1
HotCold
Manipulated Variable
Responding Variable
Identify Variables #1
Cold Hot
• Does changing the temperature of a ball affect the height the ball will bounce?
• Controlled Variables:
* Same ball
* Dropped from the same height
* Dropped onto the same surface
* etc…
Identify Variables #1
• Does changing the color of light affect the growth rate of plants?
Testable Question #2
Manipulated Variable
Responding Variable
Identify Variables #2
• Does changing the color of light affect the growth rate of plants?
• 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
• How does the size of a parachute affect the time it takes a toy
hippo to fall 10 feet?
Testable Question #3
Manipulated Variable
Responding Variable
Identify Variables #3
• How does the size of a parachute affect the time it takes a toy hippo to fall 10 feet?
• Controlled Variables:
* Same hippo
* Dropped from the same height
* Same parachute fabric
* Same length of strings on the parachute
* etc…
Identify Variables #3