units of measure
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ampere
a measure of electrical current

Avagadro's number (or constant)
the number of elementary entities per mole of substance and it has the value 6.022×10^{23 }per mole

Avoirdupois
 Weight scale based on a pound = 16 oz.
 Opposite is Troy


Barrel
 liquid measure that equals
 31.5 gallons (US)
 1/2 a hogshead
 1/4 a butt

Beaufort
Scale that measures wind speed & hurricanes

Bit
Smallest unit of information used in computer engineering; equal to 1/8 of a byte

Bolt
A large roll of cloth

Bucket
 Dry measure that equals:
 2 pecks
 or 16 quarts

Bushel
 Dry measure that equals:
 2 buckets
 or 4 pecks

Butt
 Liquid measure that equals:
 2 hogsheads or
 4 barrels or
 126 gallons US

Byte
A unit of information used in computer engineering; equal to 8 bits.

Caliber
diameter of a bullet or shell

Carat
jewler's measure of weight (diamonds) or purity (gold)

Celsius
Temp measurement, also called centegrade, where freezing = 0 and boiling = 100 degrees.

Cord
A quantity of logs measuring 128 cubic feet

Cubit
An ancient unit of length; = to about 18 inches

Curie
A unit of radioactivity

Decibel
A logarithmic measure used for measuring sound.


Elite
Typewriter type that runs 12 characters to the inch.

Fahrenheit
Temp measurement, also called centegrade, where freezing = 32 and boiling = 212 degrees.

Fathom
A measurement of water depth = to 6 feet.

Flagon
A traditional unit of liquid measure = to one gallon.

Furlong
Unit of distance = to 220 yards or 1/8th mile.

Gill
Liquid measure; equals 4 ounces.


Hectare
A unit of land measure = to 2.47 acres.

Hertz
A measure of frequency.

Hogshead
 liquid measure that equals
 63 gallons (US) or
 1/2 a butt

Joule
A quantity of energy

Kelvin
Temperature scale where 0 Kelvin is absolute zero, the point at which all motion ceases; H2O melts at 273 K (= 0° C = 32° F); H2O boils at 373 K (= 100° C = 212° F). Degrees = C + 273.

Knot
Measure of speed on the sea.

League
A unit of nautical distance = to 3 miles or 4.8 km.

Ohm
measure of electrical resistance.

Peck
 Dry measure that equals:
 8 quarts
 or 4 1/4 bushel

pH
A scale that measures whether a substance is an acid or a base. It goes from 014: 0 is an acid, 14 is a base and 7 is neutral.

Pica
A a typographic unit of measure equal to 1/6th of an inch

Quintal
A unit of weight equal to 100 kg.

Richter
A logarithmic scale that mesaures tremors and earthquakes.

rod
16.5 feet or 5.5 yards

SaffirSimpson
a classification used for some Western Hemisphere tropical cyclones (hurricanes) that exceed the intensities of tropical depressions and tropical storms

Score
A traditional unit of quantity equal to 20.

Stone
A unit of weight equal to 14 pounds or 6.4 kg.

Troy
 Weight scale based on a pound = 16 oz.
 Opposite is Avoirdupois

Volt
A unit of electrical output.

Watt
A measurement of power.

640 acres =
one square mile

Explain hierarchy of dry and liquid measure.
 Gallons are always divided into 4 quarts, which are further divided into 2 pints each. For larger volumes of dry commodities, there are 2 gallons in a peck and 4 pecks in a bushel.
 Larger volumes of liquids were carried in barrels, hogsheads, or other containers whose size in gallons tended to vary with the commodity.

ton  long and short
 2000 pounds US (short ton)
 2240 pounds UK (long ton)