NCEA L1 Science Practice Questions - NCEA Level 1 Science - New Zealand Exam

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A student measures the time taken for a toy car to roll down a ramp three separate times under identical conditions, obtaining times of 2.4 s, 2.5 s, and 2.4 s. How does repeating trials under identical conditions improve an investigation?

It eliminates systematic errors caused by poorly calibrated measuring tools It improves reliability by minimizing the impact of random timing errors It changes the independent variable to reveal non-linear relationships It automatically converts qualitative observations into quantitative data

Correct Answer:

It improves reliability by minimizing the impact of random timing errors

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