Ages 11–12🔬 Science8 verified questions on this shelf

Repeated tests for reliability

Distinguish between precision (consistency of repeated readings) and accuracy (closeness to true value), use significant figures and standard form correctly, and choose and use appropriate measuring instruments to minimise uncertainty

Try three questions

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Question 1 of 3

Liam measures the length of a wooden plank three times with a ruler. His results are 84.3 cm, 84.5 cm, and 84.4 cm. The true length of the plank is 90.0 cm. Which statement correctly describes his measurements?

Question 2 of 3

A digital balance reads mass to the nearest 0.01 g. Maya measures a sample of sand and the balance shows 3.456 g. To report the measurement with the appropriate number of significant figures, what should Maya write?

Question 3 of 3

Aisha needs to measure exactly 2.5 mL of a liquid for a chemistry experiment. Which tool will let her obtain the most reliable measurement?

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Skill names and descriptions include the Marble Skill Taxonomy © Generative Spark, Inc. (withmarble.com), licensed under ODbL 1.0 (database) and CC BY-SA 4.0 (content). Practice questions are GlowGrades's own, each checked by independent verifiers that must agree before a child ever sees it.