Independent vs. Dependent Variables

In an experiment testing plant growth under different light conditions, what is the dependent variable?

• Type of plant

• Amount of water

• Growth rate

• Type of light

What is the independent variable, when studying the effect of study time on test score?

• Test score

• Type of subject

• Study time

• Classroom environment

In testing how temperature affects the solubility of sugar in water, what is the dependent variable?

• Amount of sugar

• Type of sugar

• Solubility of water

• Temperature

What is the independent variable in an experiment measuring the impact of exercise on heart rate?

• Type of exercise

• Time of day

• Heart rate

• Intensity of exercise

When analysing the effect of caffeine on alertness, what is the dependent variable?

• Type of caffeine

• Dosage of caffeine

• Level of alertness

• Time of consumption