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.