What metal did Sumerians learn to use?

bronze
iron
nickel
steel

The california gold rush: actually had only a small impact on california’s population because its rich farmlands already attracted thousands of new settlers each year. attracted almost equal numbers of men and women. resulted in laws that discriminated against “foreign miners.” made considerable wealth for average miners because gold mining demanded no real investment of capital. hurt the development of san francisco because gold discoveries shifted interest to areas outside of town.

What was the national government’s biggest concern is facing a war under the articles of confederation

What happened in the tinker v des monies? and why is it important what happened in the hazlewood v. kuhlmeier? why is it important?