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Cornell Notes pages 42-43, 52-57 classification the arrangement of things in groups of similar items Classification identifies organisms so that we can see the relationship between living things. Aristotle 350 B.C. Greek philosopher developed a system of classifying things into plants and animals microscope led to the discovery of tiny forms of life Linnaean system 1700s Swedish scientist Carl Linne’ new classification system useful for storing and finding information about living things His system became the basis for modern classification. He changed his name to Carolus Linnaeus because Latin was the language of that time period. Naming Living Things Linnaeus gave each organism a two-part name. First: genus, start with a capital letter Second: species, start with a small letter and underline or italics genus: group of organisms that share major characteristics & closely related species: name of one specific organism Seven Levels of Classification Domain: Archaea, Bacteria, Eukarya Phylum Class Order Family Genus Species Dogs Prefer Cheese Over Fried Green Spinach species: Felis domesticus house cat species: Panthera tigris tiger Dichotomous Key a series of choices that lead to the correct name of the organism The dichotomous key is a guide used to identify living things.