VARIABLES There are three types of variables in

VARIABLES

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

Purpose: What amount of water will make the flower grow the tallest? FLOWER TYPE AMOUNT OF WATER HEIGHT OF FLOWER 10 m. L 30 centimeters 5 m. L 10 centimeters ROSE

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?

Purpose: What amount of water will make the flower grow the tallest? What is the control variable? ? ? FLOWER TYPE AMOUNT OF WATER HEIGHT OF FLOWER 10 m. L 30 centimeters 5 m. L 10 centimeters ROSE

INDEPENDENT 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?

Purpose: What amount of water will make the rose grow the tallest? What is the independent variable? FLOWER TYPE AMOUNT OF WATER HEIGHT OF PLANT 10 m. L 30 centimeters 5 m. L 10 centimeters ROSE

DEPENDENT 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?

Purpose: What amount of water will make the rose grow the tallest? What is the dependent variable? FLOWER TYPE AMOUNT OF WATER HEIGHT OF PLANT 10 m. L 30 centimeters 5 m. L 10 centimeters ROSE

PRACTICE What age of student will put together a puzzle the quickest? Student age 9 years old 14 years old 18 years old Puzzle 100 piece animal puzzle Time 45 minutes 34 minutes 29 minutes

Student age 9 years old 14 years old 18 years old Puzzle 100 piece animal puzzle Time 45 minutes 34 minutes 29 minutes Control: Puzzle Independent: Student age Dependent: Time

WHICH GENDER MOUSE (MALE OR FEMALE) WILL GET THROUGH THE MAZE THE QUICKEST? Maze type Mouse gender Time Zig-zag maze Male 48 seconds Zig-zag maze Female 17 seconds

WHICH GENDER MOUSE (MALE OR FEMALE) WILL GET THROUGH THE MAZE THE QUICKEST? Maze type Mouse gender Time Zig-zag maze Male 48 seconds Zig-zag maze Female 17 seconds