How did prehistoric people use animal skins? Check all that apply. as blankets
to plant crops
to build shelters
to make clothing
as cups and dishes
as chairs and tables

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