100 likes | 273 Views
Metric Units (SI Units). Measurements. Must have a number and a unit (Ex) 13 vs. 13 cm The number tells how much you have The unit tells what you are measuring (Ex) cm = length; g = mass; L = volume; J = energy; °C = temperature.
E N D
Measurements • Must have a number and a unit (Ex) 13 vs. 13 cm • The number tells how much you have • The unit tells what you are measuring (Ex) cm = length; g = mass; L = volume; J = energy; °C = temperature
SI Units (≈metric units)(International System of Units) • Notice the basic units have one letter. • * All other units are derived units and have two letters or more.
How to Use Prefixes 1 kg = 1000 g 1 cm = 0.01 m 1 mL = 0.001 L 1 Ms = 1000000 s 1 µL = 0.000001 L
Math Review (1) (Ex) (2)
Unit Conversion • Conversion factors (CF) 1. always in fraction form 2. always equal to 1 (Ex) 3. More than 1 CF can be multiplied 4. Units are treated like variables (Ex)
Converting Units (Ex) Convert 1.74 m to cm (Ex) Convert 14.5 nm to mm.
Practices Convert the units 1) 592 cmto in 2) 8.5 L/min to gal/sec 3) 65 km/hr to mile/min