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 • EVERYDAY METRIC UNITS
 • PREFIXES
 • SYMBOLS
 • Base Unit - meter  (m)
                   • centimeter  (cm)
                   • millimeter  (mm)
                   • kilometer  (km)
 • Derived Unit - liter  (L)
                   • milliliter  (mL)
 • Base Unit - kilogram  (kg)
                  • gram  (g)
                  • milligram  (mg)
                  • tonne  (t)
 • Temperature
 • Evolution of Measures
 • Inch-Pound Non-System

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WHAT IS A KILOGRAM?

The Base Unit for MASS is
kilogram
Use the symbol kg

This 22 kilogram salmon
is about
1 meter
long

Remember, kilo is the prefix for 1000 times as much.
So, one thousand grams (1000 g) is simply written
1 kg (1 kilogram)

This package of ground meat
is about 1 kg (1 kilogram).

A new born baby can be about the mass of
3 kg...

and a six week old puppy can be
as heavy
as 1 kg.

A 5 kg roast can easily serve
over 10 or 12 people.

 A 10 kg turkey should
easily serve
about 20 happy appetites.

 

A 40 kg bag of concrete mix
requires a strong back
to carry.

 

Smaller Measurements from a kilogram

1 gram
(1 g)

Remember, kilo is the prefix
meaning 1000 times.
So, 1 000 g (grams) is the mass of
1 kg (kilogram).
Pronounced "KILL-oh-gram"
NOT "kill-AH-gram".

Smaller Measurements from a gram

1 milligram
(1 mg)

Remember, milli is the prefix meaning
1 one thousandth (0.001).
So, 1 one thousandth of the unit of measure gram
being 1 milligram is simply written 1 mg

LARGER Measurement from a kilogram

(1 tonne)
(1 t)

There are exactly 1000 kg (kilograms)
in 1 t (spelled tonne)

DID YOU KNOW? ( Video)
that you can divide 1 meter by exactly
10 equal parts (10 cm x 10 cm x 10 cm)
then make a cube (1000 cm
ณ) of it to fill with water
and you will find that it contains exactly
1 L (1 liter) (1000 mL
) of water
and is the mass of exactly 1 kg (1 kilogram) (1000 g).

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SMALLER METRIC
MEASURES

1 cmณ (1 cubic centimeter)

filled with water contains exactly
1 mL (1 milliliter)

and is the mass  of exactly
1 g (1 gram)


•
"centimeters milliliters milligrams"

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2018 - REDEFINITION of the KILOGRAM 
For more than a century the world's fundamental unit of mass has been based on a single, cylindrical piece of metal. And authorized copies of it stored in secured chambers around the world including the United States, over the years in infinitesimal ways, are shedding or accumulating atoms here and there, thus throwing off the accuracy of the objects meant to be the world standard for measurements of mass.
The 4 cm tall ingot of platinum and iridium, known as the International Prototype Kilogram, offered the world a standardized way of measuring what earlier scientists defined as 1 kilogram being the mass of 1 liter of distilled water (at sea level).
But to ensure greater accuracy there is a method of nano-measurement using "Watt Balance" housed at the U.S. National Institute for Standards and Technology (NIST) near Washington, DC, which is a bid to recast the kilogram as a mathematical equation, unerring, immutable and ultimately easy for experts to reproduce.
And it is expected to yield groundbreaking calculations.
The ultimate purpose of the "Watt Balance" is to help scientists generate a reliable calculation of Planck's Constant. A universal value that quantifies the relationship between energy, light and an object's mass, which in turn will produce a new, more accurate basis for defining the kilogram worldwide.
The race to reinvent the unit of measurement was considered important, partly because the kilogram is the only holdout in the metric system still based on a physical object rather than a formula derived from a universal constant.
The meter, once pegged to the length of a bar of platinum, was redefined in 1983 by a formula using the speed of light as the distance light travels in a vacuum over 1/299,792,458 of a second. Which means that the length of a meter will never change.

•

HIGGS Boson
In July of 2012, scientists at the world's biggest atom smasher in Switzerland claimed the discovery of a new subatomic particle.
They called it "consistent" with the long-sought Higgs boson, popularly known as the "God particle" that helps explain what gives all matter in the universe size and shape.
It also adds to the "Big Bang" theory in creation of the universe.

The Higgs boson, which until now has been a theoretical particle, is seen as the key to understanding why matter has mass, which combines with gravity to give an object weight. Very similar to the idea of gravity as Isaac Newton discovered it to be where gravity was there all the time before Newton explained it.