1. Uncertainty & Graphs PowerPoint

2. Communicating Uncertainty in Measurement
Limit of Precision
What is the smallest increment on the measuring tool?
1 mL
LOP is +/- 1 mL
Uncertainty
How many significant figures can your measuring tool allow you?
36.5 mL (3 sig figs)
Uncertainty is +/- 0.1 mL

3. By the way…

4. Each tool below has a different uncertainty of measurement
Each tool below has a different uncertainty of measurement. State how many significant figures there are for each one, and state the limit of precision (LOP) for each one.
10 mL
0.1 mL
1 mL
2 sf
3 sf
4 sf

5. DISCUSS: How are the LOP and Uncertainty related?

6. Determine the measurement in cm communicated by each ruler, and determine the uncertainty.

7. Making a proper Graph Every graph MUST HAVE:
a Title (with the manipulated and responding variable)
label x-axis with the manipulated variable & units
label y-axis with the responding variable & units
data points plotted
a line of best fit

8. Make a graph from the following Data Table

10. Slope & Y-intercept 5.0 g/cm3
Slope = y2 – y1 WHAT IS THE SLOPE OF THE GRAPH x2 – x1 YOU CREATED? Show your work g – 30.0 g cm3 – 6.0 cm *in a Mass vs. Volume graph, the slope is equal to the density
Y-intercept = when the line crosses through the y-axis; when x = 0 *in the case of a Mass vs. Volume graph… can something that has 0 g of mass still have volume?
5.0 g/cm3 =