What is a Variable?

Types of Variables Manipulated Variable The condition that will be changed in an experiment.

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

Responding Variable

The condition that will be measured in an experiment.

Controlled Variables The conditions that are kept the same (unchanged) in an experiment. Types of Variables

Controlled Variables

The conditions that are kept the same (unchanged) in an experiment.

Identify variables for the following experiments. You can do it! Practice

Identify variables for the following experiments.

You can do it!

Does changing the temperature of a ball affect the height the ball will bounce? Testable Question #1 Hot Cold

Does changing the temperature of a ball affect the height the ball will bounce?

Identify Variables #1 Does changing the temperature of a ball affect the height the ball will bounce? Cold Hot Manipulated Variable Responding Variable

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

Controlled Variables:

* Same ball

* Dropped from the same height

* Dropped onto the same surface

* etc…

Does changing the color of light affect the growth rate of plants? Testable Question #2

Does changing the color of light affect the growth rate of plants?

Identify Variables #2 Does changing the color of light affect the growth rate of plants? Manipulated Variable Responding Variable

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

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…

How does the size of a parachute affect the time it takes a toy hippo to fall 10 feet? Testable Question #3

How does the size of a parachute affect the time it takes a toy

hippo to fall 10 feet?

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

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

Controlled Variables:

* Same hippo

* Dropped from the same height

* Same parachute fabric

* Same length of strings on the parachute

* etc…