You probably already know everything is made up of little tiny things called atoms or even that each atom is made up of even smaller particles called protons, neutrons and electrons.
Droši vien jau zini, ka visu veido mazmazītiņas daļiņas — atomi. Varbūt pat zini, ka katru atomu  veido vēl mazākas daļiņas — protoni, neitroni un elektroni.