Dichotomous Key Name: _________________ Materials: Brown bag containing ruler, pencil, pen, eraser, paper clip, scissors, rubber band, thumb tack, glue stick Directions: Navigate this dichotomous key to find out the “scientific name” of your objects. Label your picture accordingly. 1a. Item made of at least some metal................................................................. ........go to 2 1b. Item does not contain any metal................................................................. .........go to 6 2a. Item used as writing instrument............................................................ ..............go to 3 2b. Item not used as writing instrument............................................................ .......go to 4 3a. Item writes with ink................................................................... ...................mandibulus 3b. Item writes with carbon................................................................ ............................ursa 4a. Item has sharp cutting edge.................................................................. ..................tutus 4b. Item does not have a sharp, cutting edge.............................................................go to 5 5a. Item has a sharp, pointed end................................................................... .............saltus 5b. Item does not have a sharp, pointed end.......................................................combustus 6a. Item is hard.................................................................. ..........................................go to 7 6b. Item is not hard .................................................................