Welcome to our Temp. Home!DO NOW: Make sure you have the Foldable and something to write with. Open your notebook to the Table of Contents and fill in the

following: 9/6 Precision and Accuracy Pg. 8

If your name is not on this

old list of seating, find a seat that

says EMPTY. Do not sit at

the Pink Table

Welcome to our Temp. Home!DO NOW: Make sure you have the Foldable and something to write with. Open your notebook to the Table of Contents and fill in the

following: 9/6 Precision and Accuracy Pg. 8

If your name is not on this

old list of seating, find a seat that

says EMPTY. Do not sit at

the Pink Table

Welcome to our Temp. Home!DO NOW: Make sure you have the Foldable and something to write with. Open your notebook to the Table of Contents and fill in the

following: 9/6 Precision and Accuracy Pg. 8

If your name is not on this

old list of seating, find a seat that

says EMPTY. Do not sit at

the Pink Table

PRECISION AND

ACCURACYSeptember 6-7, 2012

ACCURACY• The accuracy of an

experiment/object/value is a measure of how closely the experimental results agree with a true, accepted value.

PRECISION• Precision of an

experiment/object/value is a measure of the reliability of the experiment, or how reproducible the experiment is and how repeatable the measurements are.

Class Demo: Paper Ball Darts• We will be having a little

target practice today using a bouncy ball and a target.

• Each table will choose 2-3 people to throw a ball to a target across the room from their table.

• We will gather data points to describe precision and accuracy.

Based on our definitions of PRECISION and ACCURACY, look at each picture and determine whether it has

high/low accuracy and high/low Precision

High PrecisionLow Accuracy

Low PrecisionHigh Accuracy

High PrecisionHigh Accuracy

EXIT TICKET - QUIZ1. In your own words, describe how your results from

an experiment can be PRECISE.2. In your own words, describe and give an example of

how your data collected during a lab can be described as ACCURATE.

3. If the boiling pt. of water is 100C and you measured 5 different water-based substance boiling points to be within 2 degrees from 100C, would your results be accurate, precise, or both?

4. You measured the weight of 3 different unknown masses using a Newton's Scale and found that each weighed approx. 50N to 60N. Would your results be accurate, precise, or both?