Untitled Lesson

Open Ended

How do you think the use of a universal measurement system like SI impacts scientific research and collaboration?

Multiple Choice

Why is the SI system of measurement significant for scientists around the world?

• It improves communication, offers convenience, and reduces errors.

• It is the oldest measurement system.

• It is only used in Europe.

• It is easier to memorize than other systems.

Multiple Choice

Which SI base unit is used to measure temperature in chemistry?

• Meter

• Kelvin

• Second

• Mole

Open Ended

What is a derived unit? List 5 examples.

Multiple Choice

Which of the following metric prefixes represents the smallest value?

• Milli

• Micro

• Nano

• Pico

Fill in the Blanks

How many grams are in 1 Mega gram?

Multiple Choice

Arrange the following steps of dimensional analysis in the correct order: Convert to the base unit, Start with what is given, Convert to the desired unit.

• Start with what is given, Convert to the base unit, Convert to the desired unit

• Convert to the base unit, Start with what is given, Convert to the desired unit

• Convert to the desired unit, Convert to the base unit, Start with what is given

• Start with what is given, Convert to the desired unit, Convert to the base unit

Open Ended

Explain how you would convert 4.5 ng to mg using dimensional analysis.

Fill in the Blanks

Convert 1.5 dm to hm.

Fill in the Blanks

How many Megaseconds are in 7.12 x10^21 microseconds?

Multiple Choice

Which of the following is NOT a step in dimensional analysis with derived units?

• Start with what is given

• Convert one unit at a time to the base unit, then the desired unit

• Make sure your final derived unit matches the unit you are looking for

• Estimate the answer before converting units

Fill in the Blanks

Convert 8.3 m/s to nm/ms.

Multiple Choice

Which of the following conversions is correct for 2.4 g/mL to kg/μL?

• 2.4 x 10^-6 kg/μL

• 2.4 x 10^-3 kg/μL

• 2.4 x 10^3 kg/μL

• 2.4 x 10^6 kg/μL

Multiple Choice

Why are measurements always uncertain?

• Because instruments are always faulty

• Because smallest digits are always estimated or error in instrument or human

• Because measurements are always rounded up

• Because standards are not defined

Multiple Choice

Which of the following best describes an estimated digit in measurement?

• A digit that is always exact and never rounded

• A digit that is read from equipment and rounded as the last digit

• A digit that is ignored in scientific measurements

• A digit that is only used in calculations, not in measurements

Multiple Select

Which of the following pieces of equipment require you to include an estimated digit when recording measurements?

• Triple Beam Balance

• Thermometer

• Calculator

• Graduated Cylinder

Fill in the Blanks

Measured values are recorded to the correct number of

figures.

Multiple Choice

If a ruler allows you to measure up to the tenths place, to what place can you estimate one digit further?

• Hundredths place

• Ones place

• Tenths place

• Thousandths place

Multiple Choice

When reading a graduated cylinder, what is the best way to record the measurement including the estimated digit?

• Record only the whole number

• Record to the nearest tenth and estimate one more digit

• Record to the nearest hundredth only

• Round to the nearest whole number

Open Ended

Explain how you determine the correct number of digits to record from a measurement scale, using the examples of a ruler and a graduated cylinder.

Fill in the Blanks

What is the measurement with an estimated digit?

Fill in the Blanks

To what place can the graduated cylinder be estimated?

Multiple Choice

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

• 1.01

• 100

• 0.0001

• 5,000

Open Ended

Explain the difference in how you determine the number of significant figures in a number with and without a decimal point.

Multiple Choice

When adding or subtracting numbers, how do you determine the number of decimal places to use in your final answer?

• Use the number with the most decimal places

• Use the number with the least decimal places

• Use the number with the most significant figures

• Use the number with the least significant figures

Open Ended

Calculate the result of 2.67 - 1.34 using the correct number of significant figures.

Open Ended

Reflecting on today's lesson about scientific measurements and the SI system, what is one question you still have or one thing you would like to know more about?

Multiple Choice

Why do scientists worldwide use the SI system of measurement?

• To improve communication, convenience, and diminish likelihood of errors

• Because it is the oldest system

• Because it is only used in Europe

• Because it is required by law in every country