15.
what was the columbian exchange?
o native americans taught european travelers where to search for gold.
o
french voyages between the eastern and western hemispheres took place.
o
native americans brought diseases to the europeans for which they had no immunity.
o
a transfer of people, products, and ideas occurred between the hemispheres.

on this day in 1913, henry ford installs the first moving assembly line for the mass production of an entire automobile. his innovation reduced the time it took to build a car from more than 12 hours to two hours and 30 minutes.

thurgood marshall

explanation: in 1954, thurgood marshall and a team of naacp attorneys won brown v. board of education of topeka, kansas. in this landmark decision, the supreme court held that segregation in public education violated the equal protection clause of the fourteenth amendment.