Social Studies Vocabulary Chapter 4, Lessons 1, 2, 3 expedition – journey made for a special purpose colony – settlement far from the country that rules it Columbian Exchange – movement of people, animals, plants, diseases, and ways of life between the Eastern Hemisphere and the Western Hemisphere following the voyages of Columbus. conquistador – Spanish word for conquerors that came to the Americans in the 1500s. ally – a friend who will help in a fight. conquest – capture or taking of something by force. colonist – person who lives in a colony. convert – to change from one belief to another. society – a group of people forming a community. encomienda – grant given by the King of Spain to wealthy settlers in New Spain. mission – religious settlement where missionaries live and work. Plantation – a large farm with many workers who live on the land they work. missionary – a person who teaches his or her religion to others who have different beliefs.