Answer:standard unit of measurement provides a reference point by which objects of weight, length or capacity can be described. Although measurement is an important part of everyday life, kids don't automatically understand that there are many different ways to measure things.
Explanation:
Historians identify turning points and recognize that the choice of specific dates gives a higher value to ones narrative, region, or group
The Ohio River, as the dividing line between<span> slave states, </span>south,<span> and free-soil states, </span>north.
