Initial Model

1.A.2 Develop an initial model to describe changes and mechanisms at both the observable and the particle level that cause hail to fall during a brief time period.

See Pre-Assessment Reference for Students Initial Models for complete guidance on ideas to look for in the initial models.

If you haven’t already, copy both Initial Model and Representing Particle-Level Changes in the System for future reference so you can assess individual student growth between now and future key summative assessment points in the unit. Additionally, this initial model collection will help you (1) get a sense of commonalities and differences across models and (2) plan for the consensus model discussion during day 2 by serving as an individual pre-assessment of student understanding.