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Class 9 Science Exploration: Entering the World of Secondary Science Hypothesis and experimentationHard

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A student tests friction by using different toy cars on different surfaces. What should be changed to make the experiment valid?

Answer and explanation

Correct answer: Use the same car on all surfaces

Different cars may influence the result so only surface type should change. In exams change one factor at a time.

Related tags

Friction Controlled-Variable Toy-Car Validity Hypothesis And Experimentation Exploration: Entering The World Of Secondary Science Exploration Entering The World Of Secondary Science Science

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