sona lon (toki Elena: φυσική (physikḗ)) li sona pi pali lon. ni li jo e pali e wawa e tawa. sona lon li suli mute kin tawa nasin sona. tenpo mute la, sona lon en nasin sona ante li wan.
jan li alasa sona lon tan tenpo pini suli. taso, pilin jan pi sona lon li ante lon tenpo. tenpo mute la, jan li kepeken sona lon sin tawa pana ilo sin. ni wan li sona pi wawa linja.