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Accuracy, precision, errors and significant figures

9th grade (Year 10 in England) · 16 questions · Common Core: NGSS.SEP 5, NGSS.HS-PS1-7 · England: KS4 Working scientifically, KS4 Combined Science: Working scientifically

Name

Date

Score/ 16

  1. Question 1

    A calculator gives a density of 358.04. Write it to 2 significant figures.

    Answer

  2. Question 2

    A balance reads 0.5 g with nothing on it. With a rock on it, it reads 15.5 g. What is the true mass of the rock, in g?

    Answerg

  3. Question 3

    What is the resolution of a ruler marked in millimetres?

    • A. 1 mm
    • B. 1 cm
    • C. 0.1 mm
    • D. 1 m

  4. Question 4

    A calculator gives a density of 0.72742. Write it to 2 significant figures.

    Answer

  5. Question 5

    A balance reads −0.3 g with nothing on it. With a rock on it, it reads 43.6 g. What is the true mass of the rock, in g?

    Answerg

  6. Question 6

    What is the resolution of a ruler marked in millimetres?

    • A. 1 cm
    • B. 0.1 mm
    • C. 1 mm
    • D. 1 m

  7. Question 7

    A calculator gives a density of 1649.8. Write it to 2 significant figures.

    Answer

  8. Question 8

    A balance reads 0.5 g with nothing on it. With a rock on it, it reads 24.6 g. What is the true mass of the rock, in g?

    Answerg

  9. Question 9

    Readings of the same length: 12.1, 12.1, 12.2, 12.1 cm. The true length is 13.0 cm. The readings are…

    • A. neither repeatable nor close
    • B. accurate but not precise
    • C. accurate and precise
    • D. precise but not accurate

  10. Question 10

    A calculator gives a density of 0.92604. Write it to 3 significant figures.

    Answer

  11. Question 11

    A balance reads −0.3 g with nothing on it. With a rock on it, it reads 48.3 g. What is the true mass of the rock, in g?

    Answerg

  12. Question 12

    What is the resolution of a ruler marked in millimetres?

    • A. 1 cm
    • B. 1 mm
    • C. 1 m
    • D. 0.1 mm

  13. Question 13

    A calculator gives a density of 79.709. Write it to 3 significant figures.

    Answer

  14. Question 14

    A balance reads −0.2 g with nothing on it. With a rock on it, it reads 49.5 g. What is the true mass of the rock, in g?

    Answerg

  15. Question 15

    A balance shows 0.3 g when nothing is on it. What kind of error is this?

    • A. a zero error (a systematic error)
    • B. an anomalous result
    • C. a random error
    • D. no error

  16. Question 16

    A calculator gives a density of 1452.3. Write it to 2 significant figures.

    Answer

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  1. 360
  2. 15 g
  3. 1 mm
  4. 0.73
  5. 43.9 g
  6. 1 mm
  7. 1600
  8. 24.1 g
  9. precise but not accurate
  10. 0.926
  11. 48.6 g
  12. 1 mm
  13. 79.7
  14. 49.7 g
  15. a zero error (a systematic error)
  16. 1500