Term Definition Sentence reason for doing something Becoming rich and famous was a _______________ for many of the early explorers. contest to see who is the best There was a lot of _________________ between the European countries to claim land in the New World before the others. empire all the land that a nation controls The three great kingdoms, or ___________, of Ghana, Mali, and Songhai became more powerful by controlling trade. navigation how you know where you are going The sextant was one of the new tools used for _____________ that helped sailors locate where they were on the sea. obstacle a thing that blocks one's way or prevents or hinders progress. One of the major _____________ the sailors faced was disease and starvation. motivation competition Picture interaction conquest conquistador indigenous infectious an exchange of ideas or products. The ________________ between the Native Americans and the explorers was diverse, ranging from friendly welcomes to deadly attacks. when one society takes over another society The ______________ of North and South America was important to the countries of Spain, France, England, and Portugal. Spanish explorer who conquered that Native Americans _________________ rode horses so that they could cover longer distances without getting tired. natural to an area Coffee was a plant ________________ to the Americas. contagious, as in a disease Smallpox was an _______________ disease and killed many Native Americans when the Europeans arrived.