smc-1120-20-Scientific Notation

Measurement, STD1 M1 2022 HSC 1 MC

What is 650 000 000 expressed in standard form?

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♦ Mean mark 45%.

What is 0.002073 expressed in standard form with two significant figures?

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♦♦♦ Mean mark 12%.

What is 0.002073 expressed in standard form with two significant figures?

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♦♦ Mean mark 35%.
COMMENT: A notable knowledge gap flagged by this result.

What is 1 560 200 km written in standard form correct to two significant figures?

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♦♦ Mean mark 30%.
COMMENT: Incredibly, the first MC question in 2015 had the lowest mean mark of all MC questions in the exam!

What is mm expressed in scientific notation?

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The mass of a sample of microbes is 50 mg. There are approximately microbes in the sample.

In standard form, what is the approximate mass in grams of one microbe? (2 marks)

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♦♦♦ Mean mark 20%.
IMPORTANT: Can you solve: 8 apples weigh 1kg, what does 1 apple weigh? This is exactly the same concept.