1. Chapter 4: Metric System
Standard Units &
Metric Conversions

2. What is Metrics?
Also Called International System (SI)
Based on factors of ten

3. 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.

4. Standard Units
Length
Mass
Time
Temperature
Amount of substance
meter
kilogram
second
Deg. Celsius
mole

5. 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

6. Metric Prefixes
Each prefix signifies an amount of base units represented.

7. King Henry Died by drinking
cockroach milkshakes!!!

8. Kilo
Hecto- 100
Deka- 10
Base unit
Deci or 1/10th
Centi or 1/100th
Milli or 1/1000th

9. Other prefixes
Mega
Giga
Tera
Micro or 1/ th
Nano or 1/billon
Pico

10. Sample Problems 268 grams =_____milligrams
5,638 centimeters =___meters
8 meters =_____Kilometers

11. Sample Problems .0096 Kilograms =_____decigrams
13 liters =_____deciliters
2.85 milliliters =___centiliters
2.5 centigrams =_____grams

12. Sample Problems 28 Decameters =____Kilometers
.03 Kilometers =____centimeters
8 liters =____deciliters