1 Data Analysis Ch 2. 2 Units of Measurement SI units SI units Base Units Base Units Derived Units Derived Units.

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Presentation transcript:

1 Data Analysis Ch 2

2 Units of Measurement SI units SI units Base Units Base Units Derived Units Derived Units

3 SI units Time Time Seconds (s) Seconds (s) Length Length Meter (m) Meter (m) Mass Mass Kilogram (Kg) Kilogram (Kg) Temperature Temperature Kelvin (K) Kelvin (K) Amount of substance Amount of substance Mole (mol) Mole (mol)

4 Base Units Time Time Seconds Seconds Length Length Meter Meter Mass Mass Kilograms Kilograms

5 Derived Units Volume Volume Cubic centimeters (cm 3 ) Cubic centimeters (cm 3 ) Density Density Grams per Cubic centimeters (g/cm 3 ) Grams per Cubic centimeters (g/cm 3 )

6 Temperature Kelvin Kelvin Celsius Celsius Fahrenheit Fahrenheit

7 How to solve a problem Read the problem carefully. Read the problem carefully. Identify what is being asked. Identify what is being asked. Analyze problem. Analyze problem. List what you know and what you are looking for. List what you know and what you are looking for. Gather information you may need Gather information you may need Conversions, formulas, tables, etc. Conversions, formulas, tables, etc. Solve unknown. Solve unknown. Draw if needed. Draw if needed. Write equation or formula, sub in, solve. Write equation or formula, sub in, solve. Evaluate answer. Evaluate answer. Does it make sense? Does it make sense? Significant figures! Significant figures!

8 Scientific Notation Adding and subtracting Adding and subtracting Multiplying and dividing Multiplying and dividing

9 Dimensional Analysis Conversion factor Conversion factor Unit multiplier Unit multiplier

10 Reliability Accuracy Accuracy Precision Precision Percent error = Percent error =

11 Significant Figures

12 Significant Figures Rules Non-zeroes Non-zeroes Ex: 72.3 g = 3 Ex: 72.3 g = 3 Zeroes BETWEEN non zeroes Zeroes BETWEEN non zeroes 60.5 g = g = 3 Final 0 to right of decimal Final 0 to right of decimal g = g = 4 Zeroes that are placeholders Zeroes that are placeholders g and 320 g = g and 320 g = 2 Counting # and defined terms Counting # and defined terms 6 molecules and 60 s = 1 min 6 molecules and 60 s = 1 min

13 Rounding 5 or greater round UP 5 or greater round UP Less than 5 leave same Less than 5 leave same

14 Sig Fig MATH Rules for adding and subtracting Rules for adding and subtracting Rules for multiplying and dividing Rules for multiplying and dividing

15 Representing Data Graphs Graphs Circle Circle Bar Bar Line Line Slope Slope

16 Credits Information was gathered from Chemistry Glencoe book Information was gathered from Chemistry Glencoe book Images were used from Microsoft Clip Art Images were used from Microsoft Clip Art Media presentation was created by Michelle Estrada Media presentation was created by Michelle Estrada