The winter is here!
Notice the sound similarities in the words
化学 /huàxué/ CHEMISTRY (TEACHINGS of the TRANSFORMATIONS)
滑雪 /huáxuě/ TO SKI (lit. TO SLIDE ON SNOW)
家 /jiā/ in the word 化学家 /huàxuéjiā/ A CHEMIST helps to create professions with a high level of sophistication – but not all of them.
We find it in professions of VISUAL AND MUSIC ARTISTS, WRITERS, SCIENTISTS etc.
What these professions have usually in common is that they can be (and often are) done individually, a lot of these professions can be done from HOME, which is the primary meaning of 家 /jiā/.