Independent Dependent Control Variables

• In a plant growth experiment - How does water affect plant growth?

• -- The amount of water added to the plant(s) is the

• Independent variable

• Dependent variable

• Control Group

• Experimental group

• Constants

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Variable that is manipulated or changed by the experiment

• Independent variable

• Dependent variable

• Control Group

• Experimental group

• Constants

Tags

NGSS.MS-PS2-2

Variable that is measured or observed, data that is collected

• Independent variable

• Dependent variable

• Control Group

• Experimental group

• Constants

Tags

NGSS.MS-PS3-4

Group that does not receive the independent variable being tested; used for comparison

• Independent variable

• Dependent variable

• Control Group

• Experimental group

• Constants

A variable that is changed in a scientific experiment.

• Controlled Variable

• Independent Variable

• Dependent Variable

• Scientific Experiment

The measurable outcome in a scientific experiment.

• Controlled Variable

• Independent Variable

• Dependent Variable

• Scientific Experiment

Tags

NGSS.MS-PS3-5

Mosquito repellent is sprayed on one arm and the other arm is not sprayed. The number of mosquito bites is counted after 2 hours. Identify the control.

• spraying on mosquito repellant

• NOT spraying on mosquito repellant

• number of mosquito bites

• 2 hours

What is being kept constant?

• ramp height

• speed of the ball rolling

• type of ball

Tags

NGSS.MS-PS2-2

Mark notices he has dropped calls on his cell phone when he walks into his bedroom. His friend told him to try and wrap aluminum foil around his phone to get better signal. Mark talks on the phone 3 times while walking into his bedroom and drops 2 of the 3 calls. He wraps his phone in aluminum foil and talks on the phone 3 more times while walking into his bedroom. With the aluminum foil on his phone he only drops 1 phone call.

• Number of dropped calls

• Control

• 3 calls made without aluminum foil.

• Dependent Variable

• Wrapping the phones in foil

• Independant Variable

Tags

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

Manipulated variable

• Independent variable

• Dependent variable

• Control Group

• Experimental group

• Constants

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-5