In the U S A the system of weights and measured first adopted was that of the English, though a few differences came inwhen decisions were made at the time of standardization in 1836. For instance, the wine-gallon of 231 cubic inches was usedinstead of the English one (as defined in 1824) of about 277 cubic inches. The U S A also took as their standard of drymeasure the old Winchester bushel of 2150.42 cubic inches, which gave a dry gallon of nearly 269 cubic inches.

Even as late as the middle of the 20th century there were some differences in UK and US measures which were nominally thesame. The UK inch measured 2.53998 cm while the US inch was 2.540005 cm. Both were standardized at 2.54 cm in July1959, though the U S continued to use 'their' value for several years in land surveying work - this too is slowly beingmetricated.

4 inches= 1 hand1.98 hands= 1 link1.5151 links= 1 foot3 feet= 1 yard2yards= 1 fathom2.75 fathoms= 1 rod, pole, or perch4 rods= 1 chain10 chains= 1 furlong1.0909 furlongs= 1 cable’s length7.333 cable’s length’s = 1 mile1.1508= 1 international nautical mile

Make the following conversions:1 yard= ____ links 1 fathom= ____ poles1 international nautical mile= ____ furlongs

1 mile= ____ inches

144 square inches= 1 square foot (ft2)9 square feet= 1 square yard (yd2)

272 1/4 square feet= 1 square rod 9 (sq rd)160 square rods= 1 acre

640 acres= 1 square mile (mi2)1 mile square= 1 section of land

36 sections= 1 township

1 square yard= ____ square inches1 township= ____ acres

How many square feet is the Pekin township?

33.6003 cubic inches= 1 pint (pt)2 pints= 1 quart8 quarts= 1 peck

3.2143 pecks= 1 cubic foot (ft3)1.2444 cubic feet= 1 bushel (bu)

21.6972 bushels= 1 cubic yard 9 (yd3)

1 quart= ____ cubic inches32 pints= ____ cubic feet

1 bushel= ____ quarts

20 minims (min)= 1 fluid scruple3 scruples= 1 fluid dram (fl dr)1 1/3 fluid drams= 1 teaspoon

3 teaspoons= 1 tablespoon2 tablespoons= 1 fluid ounce (fl oz)

4 fluid ounces= 1 gill4 gills= 1 pint

2 pints= 1 quart4 quarts= 1 gallon2 gallons= 1 peck4 pecks= 1 bushel

8 bushels= 1 quarter

1 gill= ____ scruples 80 tablespoons= ____ pints 500 minims= ____ tablespoons 1 bushel= ____ gills

20 grains= 1 scruple1.2 scruples= 1 pennyweight1.393 pennyweights= 1 dram

16 drams= 1 ounce (oz)1.0971 ounces= 1 ounce troy (oz t)12 ounces troy= 1 pound troy (lb t)1.2153 pounds troy= 1 pound (lb)

100 pounds= 1 hundredweight1.12 hundredweight's= 1 long hundredweight

17.8571 long hundredweight's= 1 ton1.24 ton= 1 long ton

40 grains= ____ drams1 pound= ____ ounces troy2000 pounds= ____ ton(s)

1 ounce= ____ pennyweights

Le Systeme international d’Unites was adopted by nearly every country in the world in October 1960. It is based upon 7 fundamental units. We will look at 3 of them, 2 of which are metric units. They are:the meter (the distance light travels, in a vacuum, in 1/299792458 of a second), the kilogram (the mass of an international prototype in the form of a platinum-iridium cylinder kept at Sevres in France), and the Kelvin (1/273.16 of the thermodynamic temperature of the triple point of water).

yotta, (Y), 10 24

zetta, (Z), 10 21

exa, (E), 10 18

peta, (P), 10 15

tera, (T), 10 12

giga, (G), 10 9

mega, (M), 10 6

kilo, (k), 10 3

hecto, (h), 10 2

deka, (da), 10 1

deci, (d), 10 –1

centi, (c), 10 –2

milli, (m), 10 –3

micro, (u), 10 –6

nano, (n), 10 –9

pico, (p), 10 –12

femto, (f), 10 –15

atto, (a), 10 –18

zepto, (z), 10 –21

yocto, (y), 10 –24

Here are some common prefixes used in the metric system.

Units of length10 millimeters (mm) = 1 centimeter (cm)10 centimeters = 1 decimeter (dm)10 decimeters = 1 meter (m)10 meters = 1 dekameter (dam)10 dekameters = 1 hectometer (hm)10 hectometers = 1 kilometer (km)

Units of area100 square millimeters (mm 2 ) = 1 square centimeter (cm 2 )100 square centimeters = 1 square decimeter (dm 2 )100 square decimeters = 1 square meter (m 2 )100 square meters = 1 square dekameter ( dam 2 )100 square dekameters = 1 square hectometer ( hm 2 )100 square hectometers = 1 square kilometer ( km 2 )

46 hm = ____ cm 11 m = ____ km1 m 2 = ____ cm 2

Units of liquid volume10 milliliters ( mL ) = 1 centiliter ( cL )10 centiliters = 1 deciliters ( dL )10 deciliters = 1 liter ( L )10 liters = 1 dekaliter ( daL )10 dekaliters = 1 hectoliter ( hL )10 hectoliters = 1 kiloliter ( kL )

Units of mass10 milligrams ( mg ) = 1 centigram ( cg )

10 centigrams = 1 decigram ( dg )10 decigrams = 1 gram ( g )

10 grams = 1 dekagram ( dag )10 dekagrams = 1 hectogram ( hg )10 hectograms = 1 kilogram ( kg )

1000 kilograms = 1 megagram ( Mg ) or metric ton

Units of dry volume1000 cubic millimeters ( mm 3 ) = 1 cubic centimeter ( cm 3 )1000 cubic centimeters = 1 cubic decimeter ( dm 3 )1000 cubic decimeters = 1 cubic meter ( m 3 )

CONVERT30 mL = ____ L1400 mg = ____ g3m 3 = ____ mm 3

32 degrees Fahrenheit is the freezing point of water at sea level212 degrees Fahrenheit is boiling point of water at sea level

0 degrees Celsius is the freezing point of water1oo degrees Celsius is the boiling point of water

273 Kelvin is the freezing point of water373 Kelvin is the boiling point of water

86 degrees F = ____ degrees C 29 degrees Celsius = ____ Kelvin

60 seconds= 1 minute60 minutes= 1 hour

24 hours= 1 day28, 29, 30, or 31 days= 1 month

12 months= 1 year10 years= 1 decade

10 decades= 1 century10 centuries= 1 millennium

How many seconds in a year?

First: Answer a couple of questions!Which measurement system do you think is more reliable?

Justify your answer!What are some reasons for the international community of scientists

development of SI?Second:Create your own units of measurement for

length and mass! Provide a standard you would base the measurements on.

Name the unit!Show at least five examples of how you would use the measurements in

everyday life.

STATE GOAL 11: Understand the processes of scientific inquiry and technological design to investigate questions, conduct experiments and solve problems.

STATE GOAL 13: Understand the relationships among science, technology and society in historical and contemporary contexts.

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