1. 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

2. 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

3. 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

4. PRECISION AND ACCURACY September 6-7, 2012

5. ACCURACY The accuracy of an experiment/object/value is a measure of how closely the experimental results agree with a true, accepted value.

6. 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.

7. 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.

8. 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 Precision Low Accuracy Low Precision High Accuracy High Precision High Accuracy

9. EXIT TICKET - QUIZ 1.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?