What do we mean when we say that the Texas government has a system of checks and balances

Which of the following was a reason why the loss of alsace and lorraine to germany was a major blow to france?

After the congress of vienna europe

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