Question 1

Which of the following numbers contains exactly three significant figures?

Accepted Answer

$0.00450$

Question 2

When multiplying $2.34$ (three significant figures) by $0.056$ (two significant figures), how many significant figures should the final answer have?

Accepted Answer

Two

Question 3

Which of the following measurements is most appropriate for expressing the mass of a human body?

Accepted Answer

Kilograms $(kg)$

Question 4

A scientist enters the number $1230.370$ into a calculator. If the number actually has five significant figures, how should it be written?

Question 5

Which of the following numbers has four significant figures?

Accepted Answer

$0.01250$

Question 6

When expressed in scientific notation, the number $-0.00297$ becomes:

Accepted Answer

$-2.97 	imes 10^{-3}$

Question 7

How many significant figures are in the measurement $0.01025$?

Accepted Answer

Four

Question 8

A car’s mass is $1,360,000$ g. How should this be written in kilograms using the correct number of significant figures?

Accepted Answer

$1.36 	imes 10^3$ kg

Question 9

Which rule applies when determining the number of significant figures in the sum $12.34 + 0.0567 + 1.2$?

Accepted Answer

The answer should have the same number of decimal places as the measurement with the fewest decimal places.

Question 10

A laser pulse is $0.15$ ns long. What is the length of this pulse in picoseconds $(ps)$?

Accepted Answer

$150$ ps

Question 11

Which of the following is NOT a rule for determining significant figures?

Accepted Answer

Trailing zeros in a number without a decimal point are always significant.

Question 12

A ball is measured to have a mass of $0.0450$ kg. How many significant figures does this measurement have?

Accepted Answer

Four

Question 13

Which of the following is the correct way to report the sum $13.6 + 0.432$ using significant figures?

Accepted Answer

$14.0$

Question 14

Which measurement is most appropriate for expressing the radius of an atom?

Accepted Answer

Nanometers $(nm)$

Question 15

If you measure the length of a table as $1.234$ m, what is the number of significant figures in your answer?

Accepted Answer

Four

Question 16

Which of the following numbers has only one significant figure?

Accepted Answer

$0.0007$

Question 17

A ball is measured to have a diameter of $0.01250$ m. How many significant figures does this measurement have?

Accepted Answer

Five

Question 18

Which of the following is the correct way to report the product $2.5 	imes 3.42$ using significant figures?

Accepted Answer

$8.6$

Question 19

Which of the following is the correct number of significant figures in $1.0070 	imes 10^3$?

Accepted Answer

Five

Question 20

A ball is measured to have a mass of $0.045$ kg. How many significant figures does this measurement have?

Accepted Answer

Three

Units and Significant Figures in Data

Study Guide - Practice Questions