1. Standards of Measurement
Section 1.2

2. Measurement
Standard- exact quantity people agree to use for comparison
Unit- description of what standard was used
SI system- international system of units
Allows easy communication between scientists
g, m, L, s, A, K, mol - base units- unit by itself

3. Metric Prefixes Giga- 1,000,000,000 G Mega- 1,000,000 M Kilo- 1,000 k
Hecto h
Deca – da
Base Unit
Deci d
Centi c
Milli m
Micro μ

4. Metric Conversions
Conversion factor- ratio equal to 1 that can be used to convert between units
Volume- space occupied by an object
Mass- amount of matter in an object
Density- mass per unit volume- reason same volume may have different mass
Derived unit- combinations of base units
g/ml

5. Temperature Temperature- measure of average KE of molecules
Celsius
Fahrenheit
Kelvin
0 K = oC
K = oC
oC = K