1. Chapter 4 Measurement

2. §4.1 – Accuracy (Significant Digits) Numbers – Exact (counting) – Approximate (all measurements) Measurements and rounding – Error – Need for significant digits Measurement handout – Examples

3. §4.2 – Precision and Greatest Possible Error Precision – (from p. 152) – the precision of a measurement means the smallest unit with which the measurement is made; that is, the position of the last significant digit – Figure 4.4 (p. 153) Greatest possible error – (from p. 154) – the greatest possible error of a measurement is equal to one-half its precision – Figure 4.5 (p. 153) Problems 4.2 #5, 6, 13

4. §4.3 – Vernier Calipers Uses (Figures p. 156) Metric measurements – Example 1 (p. 157) – 4.3A problems #2, 4 (p. 158) English (U.S.) measurements – Example 4 (p. 160) – Problems 4.3B #2, 4 (p. 161)

5. §4.4 – Micrometer Caliper Metric measurements – Example 2 (p. 164) – 4.4A problems #2, 4 (p. 164) English (U.S.) measurements – Example 4 (p. 166) – Problems 4.4B #2, 4 (p. 167)

6. §4.5 thru 4.6 – Arithmetic with measurements Measurement document – adding and subtracting – Problems 4.5 #26, 52 (p. 172) Measurement document – multiplying and dividing – Problems 4.6 #20, 32 (p. 175)

7. §4.7 – Relative Error and Percent of Error Greatest possible error – ½ the precision Percent of error – relative error expressed as a percent – Problems 4.7 #4, 18, 22 (p. 178) Tolerance – acceptable amount that a part or component may vary from a given size – Discuss example 4 p. 178 Graded Activity #5 – do #24 together first