V ARIABLES. There are three types of variables in an experiment. You can only change ONE variable (one thing) in an experiment.

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Presentation transcript:

V ARIABLES

There are three types of variables in an experiment. You can only change ONE variable (one thing) in an experiment

FLOWER TYPE AMOUNT OF WATER HEIGHT OF FLOWER ROSE 10 mL30 centimeters ROSE5 mL10 centimeters Purpose: What amount of water will make the flower grow the tallest?

CONTROL VARIABLE/CONTROL GROUP 1. A controlled variable/group is a variable/group that DOES NOT CHANGE. IT STAYS THE SAME. 1. Ask yourself: What does not change in this experiment or what stays the same?

FLOWER TYPE AMOUNT OF WATER HEIGHT OF FLOWER ROSE 10 mL30 centimeters ROSE5 mL10 centimeters Purpose: What amount of water will make the flower grow the tallest? What is the control variable?????

I NDEPENDENT VARIABLE 1. An independent variable is something that is being changed or what your testing in the experiment. 1. You can only have ONE independent variable!!!!!!! 2. Ask yourself: What is being changed in the experiment or what am I testing?

FLOWER TYPE AMOUNT OF WATER HEIGHT OF PLANT ROSE 10 mL30 centimeters ROSE5 mL10 centimeters Purpose: What amount of water will make the rose grow the tallest? What is the independent variable?

D EPENDENT VARIABLE A dependent variable is the variable that changes because of the independent variable. It is the end result of the experiment. Ask yourself: What is the end result of my experiment?

FLOWER TYPE AMOUNT OF WATER HEIGHT OF PLANT ROSE 10 mL30 centimeters ROSE5 mL10 centimeters Purpose: What amount of water will make the rose grow the tallest? What is the dependent variable?

PRACTICE Student agePuzzleTime 9 years old100 piece animal puzzle 45 minutes 14 years old100 piece animal puzzle 34 minutes 18 years old100 piece animal puzzle 29 minutes What age of student will put together a puzzle the quickest?

Student agePuzzleTime 9 years old100 piece animal puzzle 45 minutes 14 years old100 piece animal puzzle 34 minutes 18 years old100 piece animal puzzle 29 minutes Control: Puzzle Independent: Student age Dependent: Time

W HICH GENDER MOUSE ( MALE OR FEMALE ) WILL GET THROUGH THE MAZE THE QUICKEST ? Maze typeMouse gender Time Zig-zag maze Male48 seconds Zig-zag maze Female17 seconds

W HICH GENDER MOUSE ( MALE OR FEMALE ) WILL GET THROUGH THE MAZE THE QUICKEST ? Maze typeMouse gender Time Zig-zag maze Male48 seconds Zig-zag maze Female17 seconds