The students' conjectures: during an archeological dig, the students found a voussoir from a semicircular stone arch. a voussoir is a trapezoidal (wedge-shaped) stone used to build an arch or vault. what are the students trying to find out?

They are trying to find out how many stones there are in the original arch.

Explanation:

Once they've identified the stone, and its main features, they can address what kind of arch was being built there. After this general understanding, the students can predict how many stones were used to raise the arch, and how they were arranged on the structure. The prediction can be proved after all the original structure being totally understood.

i'll just take the points xd

world war i had a devastating effect on german-americans and their cultural heritage. up until that point   german-americans, as a group, had been spared much of the discrimination, abuse, rejection, collective mistrust experienced by so many different racial and ethnic groups in the history of the united states. indeed, over the years, they had been viewed as a well integrated and esteemed part of american society. all of this change with the outbreak of war.