MS-PS4-2 - Develop and use a model to describe that waves are reflected, absorbed, or transmitted through various materials.

Clarification Statement - Emphasis is on both light and mechanical waves. Examples of models could include drawings, simulations, and written descriptions.

Assessment Boundary - Assessment is limited to qualitative applications pertaining to light and mechanical waves.

6.MS-PS4-2 - Use diagrams and other models to show that both light rays and mechanical waves are reflected, absorbed, or transmitted through various materials.

Clarification Statement - Materials may include solids, liquids, and gases. Mechanical waves (including sound) need a material (medium) through which they are transmitted. Examples of models could include drawings, simulations, and written descriptions.

Assessment Boundary - State assessment will be limited to qualitative applications.