The independent variable is changed; the dependent variable is measured.
1. A student tests how water temperature affects the time sugar takes to dissolve, recording the time for each trial. Which variable is the dependent variable?
2. A student changes the amount of light plants receive and records their growth. Which variable is the independent variable?
3. Which form correctly expresses a scientific hypothesis involving the variables in an experiment?
What form does a hypothesis take, and which variables does it involve?
An if–then statement involving an independent variable and a dependent variable.
What is the purpose of an if–then hypothesis?
It states a relationship involving an independent variable and a dependent variable.
Which variable is changed or tested in an experiment?
The independent variable.
Which variable is measured in an experiment?
The dependent variable.
What materials and method should be used to draw and label a diagram?
Use pencil and a ruler, and label it with words.
What does a conclusion answer about the independent variable?
The question being investigated.
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