He "dust bowl" was an ecological situation associated with
a. world war i.
b. world war ii.
c. the cold war.
d. the great depression.

Look at the map of cities in the united states at the turn of the twentish century what impact did railroads have on cities across the united states at the turn of the twentish century

Which statement best describes a contribution of the works of nicolas copernicus and galileo galilei?

Principles of cultural identity have been used to justify conflict. true false