This resource is a short performance assessment, adapted from Stanford University’s SNAP project to provide NGSS- aligned assessment on HS-PS1-3. Students are given a scenario, where they have to find out the best salt to prevent ice from forming on the wintery roads. Students plan and conduct an investigation using five different substances to find out the best substance to prevent ice from forming Then they explain the best substance based on the patterns of the properties which stem from the strength of electrical forces between particles. At the end of this performance assessment task, students are assessed with grading rubrics for designing and conducting the experiment and taking appropriate data and on the rationale for the choice of their material based upon the properties and the strength of electrical forces between the particles
Educator and learner
Free access - The right to view and/or download material without financial, registration, or excessive advertising barriers.