1. INTRODUCTION TO MEASUREMENT, THE METRIC SYSTEM, SCIENTIFIC NOTATION, and DIMENSIONAL ANALYSIS

2. UNITS OF MEASURE ARE IMPORTANT

3. UNITS OF MEASUREMENT

5. Example

7. METRIC SYSTEM
Metric system (Le Systeme International d’ Unites) AKA “S.I.”– common units of measurement for everyone (else) 
Based on multiples or divisions of base unit 10 (remember the Dewey decimal system?)
Common metric units of measure for:
Length meter
Mass gram
Volume Liter
Time second
Energy Joule

8. METRIC PREFIXES

10. Metric Prefixes
106
105
104
103
102
101
100
10-1
10-2
10-3
10-4
10-5
10-6
Base
unit
Mega
Kilo
Deka
centi
deci
milli
micro
Meter
Liter
gram

13. Measurement
All measurements have some degree of error associated with them – we like to have high accuracy and high precision
Accuracy: Being able to come up with the “correct” or “accepted” value
Precision: Being able to come up with the same value repeatedly
Low accuracy / High precision
High accuracy / Low precision
Low accuracy / Low precision
High accuracy / High precision

14. Reading measurements
Always report measurements to one more decimal place than you are able to measure with the given scale I.e. you estimate the last digit
Always include the unit used to make the measurement – otherwise, your number is meaningless!! (ml, g, cm etc.)
When reading liquid volumes, read from the bottom of the meniscus
ruler
Graduated cylinder

15. Measurement
•      Accuracy: Being able to come up with the “correct” or “accepted” value
Precision: Being able to come up with the same value repeatedly
Low accuracy / High precision
High accuracy / Low precision
  Low accuracy / Low precision
   High accuracy / High precision

18. METRICS AND MEASUREMENT
Described in terms of ACCURACY and PRECISION

19. METRICS AND MEASUREMENT
Measurements can be:
QUANTITATIVE: numerically represented and measured
Ex. : length of hair = 4.7 cm, volume of soda = 356 mL
QUALITATIVE: descriptive
Ex. : color of hair = brown, taste of soda = sweet