Why were American leaders so much concerned about sedition and dissent during World War I than they were during the Civil War or World War II?

In which case did the supreme court's decision allow schools to use forced bussing to ensure integration of its schools?

How was apartheid practiced in south africa

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