Accuracy and PrecisionSig Fig Quiz

Objectives◦ Today I will be able to:

Differentiate between accuracy and precision Apply making accurate and precise measurements to a lab

Informal assessment – monitoring student questions, group interactions during the lab and responses to the discussion after the lab

Formal assessment – analyzing responses to the lab calculations and results section and the exit ticket

Common Core Connection ◦ Build Strong Content Knowledge◦ Attend to precision ◦ Model with mathematics◦ Use appropriate tools strategically ◦ Reason abstractly and quantitatively

Lesson SequenceEvaluate: Warm-UpEvaluate: Sig Fig QuizEngage/Explore: Accuracy and

Precision Lab 1Elaborate: Accuracy and Precision

NotesEngage/Explore: Accuracy and

Precision Lab 2Elaborate: Lab DiscussionEvaluate: Exit Ticket

Warm-UpWhat are some techniques I can use to

make precise measurements in lab?

Why is it important to make accurate and precise measurements?

Take out your cell-phone and grab a sticky note (Quiz Time)◦Put your name on the sticky

ObjectiveToday I will be able to:

◦Differentiate between accuracy and precision

◦Apply making accurate and precise measurements to a lab

HomeworkWrite the conclusion for the

Accuracy and Precision Lab

Lesson SequenceWarm-UpSig Fig QuizAccuracy and Precision Lab 1Accuracy and Precision NotesAccuracy and Precision Lab 2Lab DiscussionExit Ticket

Sig Fig QuizPut everything away except for a pencil or pen and a calculator

Part 2 – Sig Fig QuizCopy the problem onto the front or

back of your quiz. Solve and record your answer to the correct number of sig figs.1. 12.3 + 14.06 + 4.0001 = _____________

2. 16.33 + 12.465 + 0.022 = ____________

3. 34.5 x 0.0001 = _____________

4. 150.00 x 65.4 = ______________

ACCURACY AND PRECISION LAB

Take 2-3 minutes to read the lab procedure. Put a box around measurements you will record into the data table.

Lab Safety/ Clean Up No closed toe shoes or aprons

are required

Accuracy and Precision Lab Trial 1Collect data for trial 1 and

complete the trial 1 calculations at your desk. Do not complete trial two calculations yet. Record your percent error on the board.

Trial 1 DiscussionAt your table discuss the

following questions and be prepared to share out:◦What was your percent error?◦Were your measurements accurate?◦Were your measurements precise?◦How did the accuracy and precision

of your measurement affect the volume you calculated?

HOW DO YOU DEFINE ACCURACY? PRECISION?

Accuracy

Measurement is close to the accepted value

Precision

Having more significant figures in a measurement

Sports ExamplesWhich requires P or A?

http://blog.affinitymed.com/wp-content/uploads/2009/06/6-7-09-kobe-shooting-in-the-paint-small.jpg

http://i.cdn.turner.com/si/multimedia/photo_gallery/0808/oly.phelps.sequence/images/opgm-37117-mid.jpg

Lets Think…Identify the 3 different targets

using the terms accurate or precise

Accuracy and Precision Lab Trial 2Collect data for trial 2 and

complete the trial 2 calculations at your desk. Record your percent error on the board.

Trial 2 DiscussionAt your table discuss the

following questions and be prepared to share out:◦What was your percent error?◦Were your measurements accurate?◦Were your measurements precise?◦How did the accuracy and precision

of your measurement affect the volume you calculated?

Conclusion Using the data and the information used in the discussion write your conclusion for the lab. If you do not finish writing the conclusion in class, it will become your homework.

Exit TicketAt what times in your daily life

must you make precise, and or accurate, measurements?

Can you think of any careers where accurate measurements would be important?◦List several answers on the index

card