Includes:-3 sets of differentiated definition posters of transparent, translucent, and opaque (one set of singles with name and picture; one set of singles with name, picture, and definition; and one set with all three names, definitions, and pictures).-Memory Card game (or can be used in pocket chart).-Fill in the blank worksheet-Cut and paste worksheet with answer sheetCheck out my other science units here:Plant Structures and FunctionsPlanets Unit (Grades 1-4)