Vocabulary
nomad - a person who regularly moves fromp lace to place
technology - tools and methods used to help humans perform tasks
archaeologist - scientist who learns about past human life by studying fossils and artifacts
artifacts - weapon, or tool, or other item made by humans
fossils - the trace of imprint of a plant or animal that has been preserved in rock
revolution - a major change
surplus - an extra amount
specialization - the development of different kinds of jobs
domesticate - to tame animals and plants for human use
