10th grade Significant figures in measurements and calculations worksheet

Significant figures in measurements and calculations

Grade 10 Science Worksheet

Circle the best answer, or write your answer on the line.

1. 1.

   A rectangular tile measures 2.4 cm by 3.42 cm. What is its area, to the correct number of significant figures, Ari?
2. 2.

   A rectangular tile measures 0.53 cm by 7.861 cm. What is its area, to the correct number of significant figures, Bo?
3. 3.

   A rectangular tile measures 6.1 cm by 2.237 cm. What is its area, to the correct number of significant figures, Esme?

4. Read this first

   The same handful of rice weighed with three tools (example data)

   tool	smallest mark (g)	reading (g)
   kitchen scale	1	12
   school balance	0.1	12.3
   analytical balance	0.001	12.304

5. 4.

   Using the table, which reading has the most significant figures, Jun?

   • 12 g
   • 12.304 g
   • 12.3 g
6. 5.

   Using the table, why does the analytical balance give more significant figures, Kira?

   • It rounds the rice's mass upward
   • The rice got heavier
   • Its smallest mark is finer
7. 6.

   Using the table, how many significant figures does the school balance's reading have, Luz?

   • 3
   • 5
   • 2
8. 7.

   A carton holds 12 eggs. How many significant figures does the 12 have, Milo?

   • Unlimited: it is a count
   • One significant figure
   • Two, like any two-digit number
9. 8.

   Does the 100 in 1 m = 100 cm limit the significant figures in a conversion, Noah?

   • No: it is defined, so exact
   • Yes: it has one significant figure
   • Yes: it has three
10. 9.

    How should 1200 with 3 significant figures be written so the count is clear, Tala?

    • 12.00 × 10²
    • 1.20 × 10³
    • 1.2 × 10³
11. 10.

    Which is 0.000340 in scientific notation, keeping its significant figures, Zee?

    • 3.4 × 10⁻⁴
    • 34.0 × 10⁻³
    • 3.40 × 10⁻⁴