Chapter 4: Metric System Standard Units & Metric Conversions
What is Metrics? Also Called International System (SI) Based on factors of ten
Why use metrics in science? Factors of ten are much easier to work with. Research does not just occur in the U.S.—a global community requires a universal measuring system.
Standard Units Length Mass Time Temperature Amount of substance meter kilogram second Deg. Celsius mole
Though this is the standard, we will mostly use liters! Derived Units Area Volume Density Concentration Energy Square meter (m2) Cubic meter (m3) Though this is the standard, we will mostly use liters! Kg/m3 Moles/liter Joules (force x length
Metric Prefixes Each prefix signifies an amount of base units represented.
King Henry Died by drinking cockroach milkshakes!!!
Kilo- 1000 Hecto- 100 Deka- 10 Base unit Deci- .1 or 1/10th Centi- .01 or 1/100th Milli- .001 or 1/1000th
Other prefixes Mega- 1 000 000 Giga- 1 000 000 000 Tera- 1 000 000 000 000 Micro- .00001 or 1/1000000th Nano- .000000001 or 1/billon Pico- .000000000001
Sample Problems 268 grams =_____milligrams 5,638 centimeters =___meters 8 meters =_____Kilometers
Sample Problems .0096 Kilograms =_____decigrams 13 liters =_____deciliters 2.85 milliliters =___centiliters 2.5 centigrams =_____grams
Sample Problems 28 Decameters =____Kilometers .03 Kilometers =____centimeters 8 liters =____deciliters