Which is a reserved power held by the states

Abird conservation society has a database of every bird spotted by members in the past year. to make this data part of a gis would require tying each sighting to

Before the civil war, the constitution protected slavery -true -false

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