Foam starts to appear once you profusely foment (stir up) a soapy hot water bucket(2nd meaning ).
Science students can easily remember it as it sounds similar to fermentation.. and stirring is an important part of fermentation process.
f[oment] => moment. In dynamic kinetics, moment incite wheel to rotate.
FIRST - MOMENT...the initial or first moments of any successful person began with motivation
when a dog "foams at" the mouth it is "agitated"
sounds like ferment....when you ferment something you apply warmth to it(by keeping it in a cloth or closed vessel)
foment sounds like ferment
a batsman comes into form(sounds like foam) when he is INSPIRED by some one
STIRRING UP a soapy hot water bucket PROMOTES/INCITE the growth of FOAM.
stop stirring up eggs for a moment(foment) and add flour
sounds like tournments where players usually stir up and get instigated
extract the word "Foam" and think of the Foam used in fire extinguishers to put out a fire->Foment means to instigate,cause to burn,...