Select all that apply what were the benefits of gathering food along the rivers for the first humans ? a. safety b. relative ease c. large nutritional variety d. fitness e. the ability to save seeds and replant them

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

The code talkers work contributed mostly to

Iron making developed in china almost a thousand years later than in the middle east. true false