Units and Significant Figures

Question 1

What is the base unit of length in the metric system?

Answer 1

meter (m)

Question 2

How many centimeters are in one meter?

Answer 2

100 cm

Question 3

How many millimeters are in one meter?

Answer 3

1000 mm

Question 4

What is the relationship between millimeters and centimeters?

Answer 4

10 mm = 1 cm

Question 5

How many kilometers are in one meter?

Answer 5

0.001 km

Question 6

What is the base unit of mass in the metric system?

Answer 6

gram (g)

Question 7

How many grams are in one kilogram?

Answer 7

1000 g

Question 8

How many milligrams are in one gram?

Answer 8

1000 mg

Question 9

How many liters are in one cubic meter?

Answer 9

1000 L

Question 10

What is the formula to calculate the volume of a regular object?

Answer 10

length x width x height

Question 11

What is the formula for density?

Answer 11

density = mass / volume

Question 12

What units are commonly used to express density?

Answer 12

• g/mL
• g/cm³
• g/cc

Question 13

What is the mnemonic to remember metric prefixes?

Answer 13

Most Kings Hate Dragons Because Dragons Cook Many Marshmallows Nightly

Question 14

What does significant figures refer to in scientific measurements?

Answer 14

Digits that are certain except the last, which is an estimation

Question 15

Are all non-zero numbers considered significant figures?

Answer 15

Yes

Question 16

In the number 1.0082, how many significant figures are there?

Answer 16

5 significant figures

Question 17

What are placeholder zeros?

Answer 17

Zeros that are not significant

Question 18

In the measurement 0.000000931, how many significant figures are present?

Answer 18

3 significant figures

Question 19

How do you determine significant figures in multiplication and division?

Answer 19

The answer has the same number of significant figures as the number with the least significant figures

Question 20

How do you determine significant figures in addition and subtraction?

Answer 20

The answer has the same number of decimal places as the number with the least decimal places

Question 21

What is accuracy in measurements?

Answer 21

Agreement of a measurement with a true value

Question 22

What is precision in measurements?

Answer 22

Agreement among repeated measurements of the same quantity

Question 23

What is the volume of an object that measures 2.8 cm x 3.2 cm x 2.5 cm?

Answer 23

22.4 cm³

Question 24

Fill in the blank: 1 liter = _______ milliliters.

Answer 24

1000 mL

Question 25

Fill in the blank: 1 kilogram = _______ grams.

Answer 25

1000 g

Question 26

True or False: In numbers with no decimal point, zeros at the end are significant.

Answer 26

False

Question 27

How many significant figures does the number 2020 have?

Answer 27

Depends on context; could be 2, 3, or 4

Question 28

What happens to significant figures in mixed operations?

Answer 28

Determined in the same order as mathematical operations

Question 29

What is the density of a substance with a mass of 56.8 g occupying a volume of 23.4 mL?

Answer 29

Density = mass/volume = 56.8 g / 23.4 mL

Question 30

How many significant figures does the number 1000 have?

Answer 30

1 significant figure (without decimal point)

Question 31

In scientific notation, how are significant figures defined?

Answer 31

All digits in the coefficient are significant