Why Classify? What is classification? Organizing things based on their characteristics-placing them in groups Taxonomy – giving objects a name What do we classify? Cavemen . . . Scientists . . . Musicians . . . YOU????? Aristotle Back in the B.C. days Classified things by how they moved If they moved – Animal If they didn’t move – Plant If they were an animal, how did they move? Walking Swimming Flying So what’s the problem? Things that move alike may NOT be related Things that don’t move alike may BE related Some things don’t fit in any category Some things can fit in several categories Then what do we do? Agree on what to look at Agree on what to call it Change things if you find out more Classification systems Classification key ( or “dichotomous” key) Binomial nomenclature (two names) Let’s do it!!!!