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Accuracy and Precision Lab
Unit 1 Day 7
Sept 18/19, 2012
Do Now (put in your notes for today)
Done? Silently read the lab directions for today
Convert the following numbers
to Scientific Notation:
• 405000
• 0.00923
• 23
• 0.00002003
• 679.02
Convert the following to
Regular Notation:
• 2.33 x 10-4
• 8.09 x 105
• 8.1001 x 10-2
• 6.00 x 109
• 9.0889 x 100
Do Now (in your notes) Match each definition below with the correct word on the right.
1. the red diamond on the chemical diamond,
this symbol
2. easily evaporated
3. what you use to clean up an acid spill
4. the degree of exactness of a measurement
that is repeatedly recorded.
5. a measure of how close a value is to the true
value
6. what you use to protect your eyes during lab
a. Volatile
b. Precision
c. Flammable
d. Goggles
e. Accuracy
f. weak base
or baking
soda
Today’s Objective
• SWBAT compare and contrast
precision and accuracy.
• SWBAT give examples of precision
and accuracy.
A1 Announcements
• The following people need to make
up Do Nows:
– Jackie
– Leobardo
– Chris
A2 Announcements
• The following people need to make
up Do Nows:
– Vanessa Sarmiento
A3 Announcements
• The following people need to make
up Do Nows:
– Daniela
– Vanessa
B1 Announcements
• The following people need to make
up Do Nows:
B2 Announcements
• The following people need to make
up Do Nows:
– Carolina
B3 Announcements
• The following people need to make
up Do Nows:
– Alex G.
– Berenice
Page 1
• Lab Write Up Directions
– Stapled/taped/glued
Page 2
• Table of Contents
Title Date
Accuracy and Precision Lab 9/13/12
Page 3
• I: Title – Accuracy and Precision Lab
• II: Purpose - …. Copy from handout
• III: Hypothesis - …. Your best guess
• IV: Materials – …leave blank for now
• V: Procedure – Refer to Accuracy and
Precision Lab handout provided by Ms. O’Neil
Page 3
• VI: Data CollectionTrial Length (cm) % error
1
2
3
4
5
6
7
8
Average
Page 3/4
• VII: Assigned Questions (answer in complete sentences)
– 1. Were your numbers accurate? Why do you think
so?
– 2. Were your numbers precise? Why do you think
so?
– 3. If you were to do this again, do you believe your
numbers would be more accurate or more precise?
Why?
Page 3/4
• VIII: Conclusion - …
A2 – Only Procedure 1
• Take out a piece of paper and tear
into 8 pieces.
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