Which five states were added to the united states as a result of the northwest ordinance

Where did the domestication of crops and animals begin?

How did industrial production improvements impact export-dependent areas of the world during the great depression?   a.  demand for certain raw materials rose.      b.  demand for certain raw materials fell.      c.  the new technology was exported to most raw material producing nations.      d.  there was a decrease in tariffs.

Why is it useful for historians to base certain studies on the analysis of historical periods