Measurement Systems

EARLY SYSTEMS

Measurements are relative

Foot = human foot Inch = 3 barley cornsYard = nose to outstretched fingertipMile = 1,000 pacesGallon = simply the name for a pail

Even God needs measuerments

Genesis 7Cubit = elbow to tip of mid finger

Need for Consistency

The English System

Do you know our current system?

How many inches in a foot?How many feet in a yard?How many feet in a mile?How many ounces in a cup?How many cups in pint?How many pints in a quart?

The English System cont.

How many quarts in a gallon? How many cups in a gallon? How many ounces in a pound? How many pounds in a ton? How many mass ounces in a ton? Are fluid ounces and weight ounces the same?

What is the abbreviation for a pound?

CONFUSED????

Need for simplicity

Metric system “BORN” August 1, 1793 in France

THE METRIC SYSTEM

First legal to use in the USA in 1866 International acceptance by 1875Britain mandates use in 1965Canada in 1970Today only major country in the world

that does not legally require its use is ……..

THE U.S.A.

ONLY 3 BASIC UNITS:

MASS (WEIGHT) = GRAMVOLUME = LITERDISTANCE = METER

PREFIXES

KILO = 1,000 HECTO = 100 DECA = 10

MEGA = MILLION

DECI = .1 (1/10) CENTI = .01 (1/100) MILLI = .001 (1/1000)

MICRO = one millionth NANO = one billionth

English to Metric conversions

1 gallon = 3.78 liters1 pound = 453 grams1 inch = 2.54 centimeters1 foot = .3048 meters1 yard = .91 meters1 mile = 1, 609 meters

Only need to know APPROXIMATES

Visualize:

1 gram = weight of a small paperclip5 gram = weight of a nickel1 kg = 2.2 lbs = approx. weight of

textbook1 mg = weight of a piece of dust

Visualize:

1 m = length of a baseball bat, golf club, etc…

1 mm = thickness of an ID card 1 cm = width of little finger / pencil 1 km = 5 city blocks (8 blocks = 1 mile) 1 ml = single drop of liquid / teardrop

Metric to metric CONVERSIONS

State the relationship and then determine direction to move decimal pointExp kg to g would be

1000 to 1

move to the right

THUS: 12kg equals 12000 grams and

12000g equals 12kg

DIRECTION

If larger to smaller unit move decimal to right

If smaller unit to larger unit move to left