This exercise allows students to compare and contrast the nucleus of two comets and listen to audio files of NASA scientists and middle-school students conducting the activity. The imagery and data are authentic and related to real-world science that is currently underway. By comparing their responses to those of NASA scientists, students realize that while their vocabulary may be different, their process parallels that of the scientists and the task of doing science is well within their reach. The teacher's guide is available here: http://epoxi.umd.edu/pdfs/Comparing_Comets_TG.pdf Audio files for the activity can be found here: http://epoxi.umd.edu/3gallery/aud_compcomets.shtml Educational levels: Middle school, Middle school, High school, High school
