A millisecond is a thousandth of a second $(1\textrm{ ms} = 10^{-3}\us)$. A bee's wing flaps every $5\textrm{ ms}$.
A gigametre is one billion meters $(1\textrm{ Gm} = 10^{9}\um)$. The diameter of the Sun is $1.4\textrm{ Gm}$.
 Name $10^n$ Prefix Symbol $10^{-n}$ Prefix Trillion Billion Million Thousand Hundred Ten $10^{\Tred{12}}$ $10^\Tred{9}$ $10^\Tred{6}$ $10^\Tred{3}$ $10^\Tred{2}$ $10^\Tred{1}$ Tera Giga Mega Kilo Hecto Deca T G M k h da $10^{\Torange{-12}}$ $10^{\Torange{-9}}$ $10^{\Torange{-6}}$ $10^{\Torange{-3}}$ $10^{\Torange{-2}}$ $10^{\Torange{-1}}$ Pico Nano Micro Milli Centi Deci p n $\mu$ m c d