Independent Variables
In an experiment testing how often to water a plant, what is the independent variable?
Frequency of watering
What is the dependent variable in a study measuring the effect of temperature on the dissolving rate of sugar?
Time taken for sugar to dissolve
Name one controlled variable in an experiment testing how temperature affects the rate of a chemical reaction.
Concentration of reactants
What’s the independent variable in an experiment testing how different water temperatures affect how quickly sugar dissolves?
Water temperature
In a paper airplane experiment, what’s the independent variable?
Size of paper
What are you measuring when testing how far a car rolls down a hill?
Distance rolled
Name one controlled variable in a test measuring how different fertilizers affect plant growth.
Same type of plant, same amount of water
A scientist wants to know if different types of music affect how well students perform in math. What is the independent variable?
Type of music
In an experiment testing how light affects plant growth, what is the independent variable?
Amount of light
In a bouncing ball experiment, what would you measure as the dependent variable?
Height of bounce
In a plant growth experiment, name one controlled variable.
In a plant growth experiment, name one controlled variable.
A chef tests if baking time affects how soft bread turns out. What’s the dependent variable?
Softness of bread
If you test how sugar dissolves in hot vs. cold water, what is the independent variable?
Water temperature
You test whether music affects concentration. What is the dependent variable?
You test whether music affects concentration. What is the dependent variable?
True or False: Controlled variables are the things you keep the same.
True
A student wants to know if wearing sneakers vs. sandals affects running speed. What’s the independent variable?
Type of footwear
A scientist tests whether different fertilizers affect the number of tomatoes a plant produces. What’s the independent variable?
Type of fertilizer
If you test whether soil type affects how fast water drains, what’s the dependent variable?
Speed/rate of water drainage
In an experiment testing the effect of exercise on heart rate, name TWO controlled variables
Age group of participants, type of exercise
A teacher tests whether the color of paper (white, blue, yellow) affects how much students remember. Identify all variables.
Independent: Paper color; Dependent: Memory/recall score; Controlled: Same words, same time, same students