3 Accuracy and Precision You must use the correct equipmentAccuracy is how close you come to the desired valuePrecision is how close all of the data is to itself
4 Significant Figures The amount of rounding that is acceptable Calculators do not use significant figuresSig Figs are essential to reporting the resultsThis discusses how certain one is of each number
5 Significant Figures Rules 1. ALL non-zero numbers are significant 2. All zeros between non-zero numbers are significant3. Zeros to the right of a non-zero number are significant ONLY if a decimal is used4. Zeros to the left of non-zero numbers are not significant
6 Significant Figures46.3All three numbers are significant40.789All five numbers are significant7.890All four numbers are significantAll six numbers are significantFour numbers are significant
7 Significant Figures Multiplication and Division The answer must have the same number of significant figures as the measurement with the SMALLEST number of significant figuresx =On the calculator it reads:The measurement with the smallest number of sig figs is with four sig figs, so round so the answer has four sig figs, or 14.24
8 Significant Figures Addition and subtraction The answer can be no more certain than the least certain number in the calculation
9 Scientific NotationThis shows significant figures by condensing to a single digit decimal place486,000,000,000 becomes 4.86 x 1011becomes 6.8 x 10-14Must have single digit decimal placeWhen the exponent is positive, the number is greater than 1When the exponent is negative, the number is less than 1
10 Scientific NotationWhen putting scientific notation in the calculator, use the EE or EXP button, do not put x 10 ^ exponentIf this is done, the calculation will be incorrect!