How do archeologists keep track of where they found each artifact?

Explain how colonists treated the native americans and what happened to natives. ! ^^^ 12 points

How are the republican and democratic presidential candidates chosen? a. they are nominated by their state governments. b. each is nominated by his or her respective party. c. each is chosen by the governor of his or her home state. d. they are chosen by the house of representatives.

Did the both the us and ussr have atomic weapons after 1949