[Test students' ability to predict whether everyday objects will sink or float and to design and carry out simple water tests to observe, record, and explain outcomes. Scope: making age-appropriate hypotheses, conducting controlled trials with common classroom items, using drawings or checklists to compare predictions to results, discussing how basic object properties (material, size, shape, air pockets) influence buoyancy, and drawing simple conclusions. Focus on applying prediction and observation skills with safe, supervised activities for Pre-K–Grade 2.]