This is a digital download file of 40 playing cards (20 pairs). The cards can to copied and laminated. Students play "Go Fish" using the cards. Unlike the traditional "Go Fish” students have to match the category AND subcategory to make a pair. Cards are made with categories of: States of matter, Physical changes of matter, physical properties of matter, chemical changes of matter, and physical changes of matter. Each category has 4 separate subcategory pairs.