Transcript Accuracy and Precision

Accuracy and Precision
Sig Fig Quiz
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Objectives
◦ Today I will be able to:
 Differentiate between accuracy and precision
 Apply making accurate and precise measurements to a lab
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Informal assessment – monitoring student questions, group
interactions during the lab and responses to the discussion
after the lab
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Formal assessment – analyzing responses to the lab
calculations and results section and the exit ticket
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Common Core Connection
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Build Strong Content Knowledge
Attend to precision
Model with mathematics
Use appropriate tools strategically
Reason abstractly and quantitatively
Lesson Sequence
Evaluate: Warm-Up
 Evaluate: Sig Fig Quiz
 Engage/Explore: Accuracy and Precision
Lab 1
 Elaborate: Accuracy and Precision Notes
 Engage/Explore: Accuracy and Precision
Lab 2
 Elaborate: Lab Discussion
 Evaluate: Exit Ticket
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Warm-Up
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What are some techniques I can use to make
precise measurements in lab?
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Why is it important to make accurate and
precise measurements?
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Take out your cell-phone and grab a sticky
note (Quiz Time)
◦ Put your name on the sticky
Objective
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Today I will be able to:
◦ Differentiate between accuracy and precision
◦ Apply making accurate and precise
measurements to a lab
Homework
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Write the conclusion for the Accuracy
and Precision Lab
Lesson Sequence
Warm-Up
 Sig Fig Quiz
 Accuracy and Precision Lab 1
 Accuracy and Precision Notes
 Accuracy and Precision Lab 2
 Lab Discussion
 Exit Ticket
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Sig Fig Quiz
Put everything away except for a pencil or pen and a
calculator
Part 2 – Sig Fig Quiz
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Copy 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 = ______________
Take 2-3 minutes to read the lab procedure. Put
a box around measurements you will record
into the data table.
ACCURACY AND
PRECISION LAB
Lab Safety/ Clean Up
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No closed toe shoes or aprons are
required
Accuracy and Precision Lab Trial 1
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Collect 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 Discussion
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At your table discuss the following
questions and be prepared to share out:
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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 Examples
Which requires P or A?
http://blog.affinitymed.com/wpcontent/uploads/2009/06/6-7-09-kobe-shootingin-the-paint-small.jpg
http://i.cdn.turner.com/si/multimedia/photo_gallery/0808/oly.
phelps.sequence/images/opgm-37117-mid.jpg
Lets Think…
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Identify the 3 different targets using the
terms accurate or precise
Accuracy and Precision Lab Trial 2
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Collect data for trial 2 and complete the
trial 2 calculations at your desk. Record
your percent error on the board.
Trial 2 Discussion
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At your table discuss the following
questions and be prepared to share out:
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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 Ticket
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At what times in your daily life must you
make precise, and or accurate,
measurements?
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Can you think of any careers where
accurate measurements would be
important?
◦ List several answers on the index card