Units of Measure in Physics

Numerical values given physical quantities relative to some standard are called unites of measure. The global standard system of measurement units is called the International System of Units or SI units for sjort.

Seven SI Base Units
meter	distance
kilogram	mass
second	time
ampere	current
kelvin	temperature
mole	amount of substance
candela	intensity of light

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Common Derived SI Units
newton	force		coulomb	charge
Joule	energy		volt	potential
tesla	flux density		farad	capacitance
hertz	frequency		ohm	resistance

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SI unit prefixes
Prefix	10n	Scale	Decimal
yotta- zetta- exa- peta- tera- giga- mega- kilo- hecto- deca- none deci- centi- milli- micro- nano- pico- femto- antto- zepto- yocto- 10 24 21 18 15 12 9 6 3 2 1 0 -1 -2 -3 -6 -9 -12 -15 -18 -21 -24    Septillion Sextillion Quintillion Quadrillion Trillion Billion Million Thousand Hundred Ten One Tenth Hundredth Thousandth Millionth Billionth Trillionth Quadrillionth Quintillionth Sextillionth Septillionth    1,000,000,000,000,000,000,000,000 1,000,000,000,000,000,000,000 1,000,000,000,000,000,000 1,000,000,000,000,000 1,000,000,000,000 1,000,000,000 1,000,000 1,000 100 10 1 0,01 0,01 0,001 0,000,001 0,000,000,001 0,000,000,000,001 0,000,000,000,000,001 0,000,000,000,000,000,001 0,000,000,000,000,000,000,001 0,000,000,000,000,000,000,000,001

As a result 1,000 meters is a kilometer, a hundredth of a meter is centimeter and a thousandth of a meter is a millimeter.