Waht is a type of political subdivision of a nation

In 1956, people in demanded that soviet troops to be removed as the part of a call for democratic reforms

Match each model with its name and the name of the scientist who created it.

Ascientist performs an experiment where she measures the mass of a piece of metal, pours acid onto the metal, washes the metal, and then re-measures the mass of the metal. the scientist repeats the experiment several times, each time increasing the amount of acid used. the dependent variable in the experiment is the: initial mass of the metal final mass of the metal amount of acid used washing the metal