Question 1

What are SI Units?

Accepted Answer

The metric system units used by scientists to report measurements.

Answer

A system of imperial measurements.

Answer

Units of mass only.

Answer

Units of temperature only.

Question 2

What is the purpose of significant figures in measurements?

Accepted Answer

To clearly indicate the meaningful digits in a measured or calculated quantity.

Answer

To make measurements less accurate.

Answer

To reduce the size of the measurement.

Answer

To increase the amount of data collected.

Question 3

What is the density of a substance with a mass of 845.7 g and a volume of 55.4 cm3?

Accepted Answer

15.3 g/cm3

Answer

10.8 g/cm3

Answer

14.2 g/cm3

Answer

12.5 g/cm3

Question 4

How would you convert 4.1 meters to centimeters?

Accepted Answer

410 cm

Answer

400 cm

Answer

41 cm

Answer

4.1 cm

Question 5

What is the relationship between Kelvin and Celsius?

Accepted Answer

K = °C + 273

Answer

K = °C - 273

Answer

K = °C / 273

Answer

K = °C × 273

Question 6

What is a physical property?

Accepted Answer

A characteristic that can be observed or measured without changing the substance's identity.

Answer

A measurement of a substance's chemical reactivity.

Answer

A property that describes how likely a substance will change its identity.

Answer

A property that can only be measured in chemical reactions.

Question 7

What phase of matter is defined as having a definite shape and volume?

Accepted Answer

Solid

Answer

Liquid

Answer

Gas

Answer

Plasma

Question 8

What is meant by 'accuracy' in measurements?

Accepted Answer

How close an answer is to the accepted or correct value.

Answer

The consistency of repeated measurements.

Answer

The total number of measurements taken.

Answer

The range of values from the measurements.

Question 9

What is a chemical change?

Accepted Answer

A process where a substance changes its chemical composition, becoming another substance.

Answer

A measurement of physical properties.

Answer

A change in the state of matter.

Answer

A combination of different substances.

Question 10

If you have a 20-mile/hour speed, how do you convert it to meters/second?

Accepted Answer

Approximately 8.9 m/s

Answer

32.2 m/s

Answer

10.6 m/s

Answer

35.0 m/s

Question 11

What is the primary system of units used by scientists for measurements?

Accepted Answer

SI Units

Answer

British Units

Answer

Imperial Units

Answer

US Customary Units

Question 12

How do you convert units in chemistry?

Accepted Answer

You need to know where you are starting, where you are finishing, and the conversion factors.

Answer

Use a calculator for all conversions

Answer

Assume all measurements are in SI Units

Answer

Understand the scientific notation only

Question 13

What is the formula to convert Kelvin to Celsius?

Accepted Answer

K = °C + 273

Answer

K = °C x 273

Answer

K = °C / 273

Answer

K = °C - 273

Question 14

What is density?

Accepted Answer

Density = mass/volume

Answer

Density = mass + volume

Answer

Density = mass - volume

Answer

Density = volume/mass

Question 15

What is an example of a derived unit?

Accepted Answer

meters/second (m/s)

Answer

liter (l)

Answer

gram (g)

Answer

meter (m)

Question 16

Which of the following is a characteristic of a physical change?

Accepted Answer

A substance changes physical state without changing its identity.

Answer

There is a change in temperature

Answer

The chemical composition changes

Answer

The substance becomes a new substance

Question 17

What does precision refer to in measurements?

Accepted Answer

The closeness of a set of measurements to each other.

Answer

The correctness of a measurement compared to the actual value

Answer

The ability to measure without errors

Answer

The average of several measurements

Question 18

What does the percent error formula require?

Accepted Answer

Experimental value minus accepted value, divided by accepted value, times 100.

Answer

Experimental value plus accepted value divided by accepted value times 100

Answer

Experimental value divided by accepted value times 100

Answer

Accepted value minus experimental value times 100

Question 19

What is one reason for using significant figures in measurements?

Accepted Answer

To clearly indicate the meaningful digits in a measured or calculated quantity.

Answer

To convert units more quickly

Answer

To standardize all measurements

Answer

To make calculations easier

Question 20

Which of the following phases of matter has particles that are far apart and arranged randomly?

Accepted Answer

Gas

Answer

Plasma

Answer

Liquid

Answer

Solid

Question 21

What system do all scientists use to report measurements consistently?

Accepted Answer

SI Units

Answer

US Standard Units

Answer

Imperial Units

Answer

Customary Units

Question 22

What is the unit of mass in the SI system?

Accepted Answer

gram

Answer

joule

Answer

meter

Answer

liter

Question 23

What conversion factor is used to convert meters to centimeters?

Accepted Answer

100

Answer

10

Answer

1000

Answer

1

Question 24

If the temperature is 0°C, what is it in Kelvin?

Accepted Answer

273

Answer

32

Answer

100

Answer

212

Question 25

What does precision refer to in measurements?

Accepted Answer

Closeness of a set of measurements to each other

Answer

Average of multiple trials

Answer

Closeness to an accepted value

Answer

Variability in measurements

Question 26

What is density defined as?

Accepted Answer

Mass divided by volume

Answer

Mass times volume

Answer

Mass plus volume

Answer

Volume divided by mass

Question 27

Which of the following is a derived unit?

Accepted Answer

meters/second

Answer

meter

Answer

liter

Answer

gram

Question 28

How do you convert grams to kilograms?

Accepted Answer

Divide by 1000

Answer

Multiply by 1000

Answer

Add 1000

Answer

Subtract 1000

Question 29

What does a physical property describe?

Accepted Answer

Observable and measurable traits without changing the substance

Answer

How a substance reacts chemically

Answer

Energy changes during a reaction

Answer

Change in the substance's identity

Question 30

What is the purpose of using significant figures in measurements?

Accepted Answer

To clearly indicate the precision of a measurement

Answer

To convert units

Answer

To round numbers

Answer

To simplify calculations

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