Which words best help to create a fast pace in the excerpt ?

The final solution was nazi germany’s plan to

What happened 10 million years ago? if u answer, u get 50 ! plz answer ; -;

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