How did the united states change between 1776 and 1870

1. what was the purpose of the communist international organization?

Is the weather changing? consider the data of severe weather that includes tornadoes occurring throughout the u. s. over the last four years. compare the severe weather for the last three years. then compare the first three months of 2017 with that data. based on previous years, what might the prediction be for weather during 2017?

Which statement best describes the effect disease had on european and american indian population?