Question 1

Which of the following statements best describes the relationship between significant figures and measurement precision?

Accepted Answer

The more significant figures in a measurement, the more precise it is.

Question 2

When recording a measurement, what must you include in addition to the known numbers?

Accepted Answer

An additional estimated decimal place

Question 3

A student measures the length of a pencil and records it as $$8.00\ \mathrm{cm}. $$How many significant figures are in this measurement?

Accepted Answer

3

Question 4

Which of the following measurements has the greatest number of significant figures?

Accepted Answer

$$8.00\ \mathrm{cm}$$

Question 5

If a graduated cylinder shows a liquid level at $$6.78\ \mathrm{mL}$$, how many significant figures does this measurement have?

Accepted Answer

3

Question 6

Why is it important to estimate one additional decimal place when recording a measurement?

Accepted Answer

It reflects the uncertainty in the measurement and improves precision.

Question 7

A ruler is marked in millimeters. If you measure an object and record its length as $$12.30\ \mathrm{cm}$$, which digit is the estimated digit?

Accepted Answer

0

Question 8

Which of the following is the correct way to report the length of an object measured with a ruler marked in centimeters, if the object falls between $$3.1\ \mathrm{cm}$$ and $$3.2\ \mathrm{cm}$$?

Accepted Answer

$$3.15\ \mathrm{cm}$$

Question 9

A student reads the volume of a liquid in a burette as $$6.78\ \mathrm{mL}. If $$the burette is marked every $$0.1\ \mathrm{mL}$$, which digit is uncertain?

Accepted Answer

8

Question 10

Which of the following measurements is the most precise?

Accepted Answer

$$6.78\ \mathrm{mL}$$

Question 11

A student measures the mass of a sample and records $$0.200\ \mathrm{g}. $$How many significant figures are in this measurement?

Accepted Answer

3

Question 12

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

Accepted Answer

Leading zeros are significant.

Question 13

A measurement is recorded as $$0.0080\ \mathrm{mL}. $$How many significant figures does it have?

Accepted Answer

3

Question 14

Which of the following measurements is least likely to be considered precise?

Accepted Answer

$$0.2\ \mathrm{g}$$

Question 15

A student measures the temperature of a solution and records $$25.0\ ^\circ\mathrm{C}. $$What does the zero in $$25.0$$ represent?

Accepted Answer

It is an estimated digit and is significant.

Question 16

If a measurement is recorded as $$1200\ \mathrm{cm}$$, how many significant figures does it have?

Accepted Answer

2

Question 17

A scientist records the mass of a sample as $$0.050\ \mathrm{g}. $$Which of the following best explains the number of significant figures?

Accepted Answer

There are two significant figures because the zero after the five is significant.

Question 18

A student measures the length of a desk as $$1.20\ \mathrm{m}. $$Which digit is the uncertain digit?

Accepted Answer

0

Question 19

Why is it important to use significant figures when reporting scientific measurements?

Accepted Answer

To indicate the accuracy and reliability of the measurement.

Question 20

A student records the volume of a liquid as $$7.0\ \mathrm{mL}$$ using a graduated cylinder. What does the zero in $$7.0$$ indicate?

Accepted Answer

It is a significant figure and shows the precision of the measurement.

Significant Figures and Precision in Measurements

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