Unit 1 - Measurement

1
Unit 1 - Measurement

• I. Units of Measurement (p.34-45)
• Number vs. Quantity
• SI Base Units Prefixes
• Derived Units
• Density Calculations

2
A. Number vs. Quantity

• Quantity - number unit

UNITS MATTER!!
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B. SI Units
Quantity
Base Unit
Symbol
Length
meter
m
Mass
kilogram
kg
Time
second
s
Temp
kelvin
K
Current
ampere
A
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B. SI Units
Prefix
Symbol
Factor
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C. Derived Units

• Combination of base units.
• Volume - length ? length ? length
• 1 cm3 1 mL 1 dm3 1 L
• Density - mass per unit volume (g/cm3)