States of Matter: Solid, Liquid, or Gas card sort can work well individually as well as an addition to other units and can be extended in various ways. Perfect for K (kindergarten), 1st (first) grade, 2nd (second) grade, and 3rd (third) grade. Suggested ImplementationSolid, Liquid, or Gas is excellent for Primary - 3rd graders, and can be used up to a 6th grade child as a springboard for further research. Set of Printable Files Includes18 Labeled Picture CardsPliersWoodHatCarRockClockCocoaWate