Measurement

Multiple Choice

Which of the following best describes a measurement?

• A qualitative observation

• A comparison to an agreed upon standard with a number and a unit

• A random guess

• A personal opinion

Open Ended

Why is it important for every measurement to have both a number and a unit?

Multiple Choice

Why is it important for scientists to use a set of standard units when comparing measurements?

• To ensure measurements are meaningful and comparable

• To make measurements more complicated

• To avoid using any units at all

• To make results less precise

Multiple Select

Which of the following are standard SI base units and their correct symbols?

• meter (m)

• kilogram (kg)

• liter (L)

• second (s)

Multiple Choice

Which of the following is the correct SI unit and symbol for temperature?

• kelvin, K

• celsius, C

• fahrenheit, F

• joule, J

Multiple Choice

If you have a mass of 1 milligram (mg), how many grams (g) is that equivalent to?

• 0.001 g

• 0.01 g

• 0.0001 g

• 1 g

Open Ended

Explain how the prefixes 'kilo-' and 'milli-' change the value of a base unit in the SI system. Provide an example for each.

Multiple Choice

Which prefix represents 0.001 times the base unit?

• kilo

• centi

• milli

• nano

Open Ended

Explain how the relationship between milliliters and cubic centimeters is established, and why they are considered equivalent.

Multiple Choice

Which of the following is the correct equivalent for 1 foot?

• 1 foot = 12 inches

• 1 foot = 30.48 centimeters

• 1 foot = 0.3048 meters

• 1 foot = 2.54 centimeters

Multiple Choice

Which of the following best describes dimensional analysis?

• Using units as a guide to problem solving

• Writing numbers without units

• Ignoring units in calculations

• Adding units only at the end

Multiple Choice

Which of the following statements about conversion factors is correct?

• They are relationships between two units and can be exact or measured.

• They are always measured values only.

• They only apply to length units.

• They do not require significant figures.

Multiple Choice

What is the purpose of arranging conversion factors so that the starting unit cancels in dimensional analysis?

• To ensure the correct unit is obtained in the answer

• To make calculations longer

• To avoid using significant figures

• To convert numbers to fractions

Open Ended

Explain how conversion factors are used in dimensional analysis to solve problems involving unit conversions.

Open Ended

List the steps involved in the systematic approach to solving unit conversion problems as described in the slides.

Multiple Choice

If you have 15 inches, how many centimeters is that? (Use the conversion factor 1 in = 2.54 cm)

• 38.1 cm

• 30.0 cm

• 25.4 cm

• 15.0 cm

Multiple Choice

What is the conversion factor from inches to centimeters?

• 1 in = 2.54 cm

• 1 in = 1.54 cm

• 1 in = 3.14 cm

• 1 in = 0.54 cm

Open Ended

Why is it important to use significant figures when rounding your final answer in a unit conversion problem?

Open Ended

List the steps required to convert a quantity from kilometers to miles using a solution map and conversion factors.

Multiple Select

Which of the following are necessary steps in solving a unit conversion problem from kilometers to miles?

• Write down the given quantity and its unit

• Write down the quantity to find

• Collect needed conversion factors

• Ignore significant figures

Open Ended

After learning about measurements, what questions do you still have or what would you like to explore further about the topic of measurement?

Multiple Choice

What are the key characteristics of a measurement as described in the lesson?

• It is a qualitative observation and does not require a standard.

• It is a quantitative observation, compared to an agreed standard, and has a number and a unit.

• It is only a guess based on previous experiences.

• It does not require any units or numbers.