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Chapter 3 - Measuring and Calculating
Si system
34
Chemistry
10/06/2011
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Term
Si System / System Internationale
 Definition

Scientific Unit of Measurement

Formed in France 1799

Aka the Metric System
Term
What are the 7 Base quantities and their units?
 Definition

Length - m eters

Mass - g rams

Time - s econds

Temperature - K elvin

Electric Current - a mpere

luminous intensity - candela (cd)

amount of substance - mol e
Term
Name the unit and symbol for LENGTH
 Definition

Meters

 

m
Term
Name the Unit and symbol for MASS
 Definition

grams

g
Term
name the unit and symbol for time
 Definition

seconds

s
Term
Name the unit and symbol for TEMPERATURE
 Definition

Kelvin

 

K
Term
Name the unit and symbol for electric current
 Definition

ampere

 

a
Term
name the unit and symbol for luminous intensity
 Definition

candela

 

cd
Term
name the unit and symbol for amount of substance
 Definition

mole

mol
Term
Derived unit
 Definition
a unit formed from a combo of the 7 base units
Term
What is the derived unit for Volume?
 Definition
cm3 or mL
Term
What is the derived unit for density?
 Definition
g/cm3 or g/mL
Term
What is the derived unit for Joule?
 Definition
energy
Term
What is the derived unit for Newton
 Definition
weight
Term
What is the derived unit for speed?
 Definition
m/s
Term
American System
 Definition
FPS system..foot pound seconds (includes inches, miles, ounces, pints, gallons)
Term
Accuracy
 Definition
The closeness of a measurement to its value
Term
Precision
 Definition
The repeatebility of a measurement over & over again
Term
Significant Figure / Significant diget (aka SigFig or SigDig)
 Definition
# of a measurement that has actually been determined by the graduations on an instrument
Term

10^9

billion

G

 Definition
Giga's value and prefix
Term
 Definition
Term
Mega's value and prefix
 Definition
Term

10^6

Million

M

 Definition
Mega value and prefix
Term

10^3

1000

k

 Definition
Kilo value and prefix
Term

10^2

100

h

 Definition
Hecto value and prefix
Term

10^1

10

da

 Definition
Deka value and prefix
Term

1

 

(m, L, g, s)

 Definition
Base value and prefix
Term

10^-1

0.01

tenth

d

 Definition
Deci value and prefix
Term

10^-2

0.01

hundreth

c

 Definition
centi value and prefix
Term

10^-3

0.001

thousandth

m

 Definition
milli value and prefix
Term

10^-6

0.000001

millionth

(curved M symbol)

 Definition
Micro value and prefix
Term

10^-9

0.000000001

billionth

n

 Definition
Nano value and prefix
Term

10^-12

trillionth

 Definition
**Pico value and prefix
Term
 Definition