MCA Science Grade 5 Practice Questions - Minnesota Comprehensive Assessment (MCA) Science - Grade 5 Exam

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A student times how long it takes a toy car to roll down a 1-meter ramp. Why is it important to repeat the investigation three times and calculate an average?

To change the independent variable after each attempt To reduce the effect of accidental timing errors and increase reliability To ensure the car moves faster during the final trial To make the science lab take more time to complete

Correct Answer:

To reduce the effect of accidental timing errors and increase reliability

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