1. Good Morning! Shoot-Around
What instrument is used to measure meters?
What instrument is used to measure liters?
Recall as many of the Metric Prefixes you can remember from yesterday.

2. Significant Figures, Accuracy, and Precision
Mr. Ramsey

3. Significant Figures
Significant Figures - each of the digits of a number that are used to express it to the required degree of accuracy, starting from the first nonzero digit.

4. Significant Figure Rules
1. Non-zero digits are always significant. 2. Any zeros between two significant digits are significant. 3. A final zero or trailing zeros in the decimal portion ONLY are significant.

5. Significant Figures
Practice
1.247
4.056
0.002
0.0450

6. Significant Figure Rules
For any operation…you always follow the amount of significant figures for the value that is the least accurate (less numbers to the right of the decimal point) Ex: 34.5 is less accurate than = 37.3

7. Significant Figures 4.678 + 1234.1 45.3 + 2.5678 872.43 – 89.8
Practice
– 89.8

8. Accuracy and Precision
Definition
Accuracy – How close a measured value is to the actual true value Precision – How close the measured values are to each other

9. Exit Ticket 2 kg = _________ mg 123.456 + 78.90
How many sig figs?
How many sig figs?
What is the difference between precision and accuracy? When finished please turn your sheet into the tray.