How many years were between the ice age and the Middle Ages 12,000 years
11,000 years
15,000 years
10,000 years
13,000 years
14,000 years

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

What emperor was given credit for having the aqueducts built

What is one way china and canada are different