This low-prep card sort activity allows your students to explore the evolution of atomic theory through the ideas of Democritus, Dalton, Thomson, Rutherford, Chadwick, and Bohr. The sorting cards contain model names, images, descriptions, and support for each atomic theorist's model. This activity can be used as a lesson introduction or a formative assessment depending on the needs of your 7th - 12th grade science students. This digital resource includes:Teacher's Guide: outlines preparation o