🧱 Atom and Molecule Model Build

In teams, students construct a draft model set using beads, clay, paper circles, or a digital modeling tool: one atom, one simple molecule such as water or carbon dioxide, and one extended structure connected to cells or food. They label each model with substance name, particle counts, and a model key, then add a notebook sketch that matches the physical or digital version. Teams must use their evidence table from earlier phases to justify each structural choice.