físicas

físicas

"Físicas" means "physical" or "physics" depending on context.

Here, 'físicas' is used as an adjective describing 'classes', specifically the type of education being physical.

As aulas de educação física são muito importantes.

Physical education classes are very important.

Here, 'físicas' again functions as an adjective, describing the activities as involving physical effort or motion.

Ele prefere atividades físicas ao ar livre.

He prefers outdoor physical activities.

In this sentence, 'físicas' describes changes, highlighting their nature as physical transformations.

As mudanças físicas nos materiais foram analisadas no experimento.

The physical changes in the materials were analyzed in the experiment.