In science experiments, there are several types of variables:
Independent variable: The variable you change; found on the x-axis.
Dependent variable: The variable you measure; found on the y-axis.
Control variables: Variables kept constant to ensure accurate results.
Example: Testing if tire air pressure affects gas mileage.
Independent variable: Air pressure (20 PSI vs. 35 PSI)
Dependent variable: Gas mileage (miles per gallon)
Control variable: Same car used for each test
Summary:
Change the independent variable
Measure the dependent variable
Keep control variables the same
Closing note: “Kindness multiplies kindness.”
Science Variables Worksheet Key
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