Physical Science
MS-PS1-1
Atomic models of molecules and structures
Performance expectation
Develop models to describe the atomic composition of simple molecules and extended structures.
Clarification
Emphasis is on models of molecules with varied complexity and repeating extended structures.
Assessment boundary
Assessment excludes valence electrons, bonding energy, ionic subunit detail, and a complete atom-by-atom description of complex structures.
SEP
Practice
- Developing and Using Models
DCI
Core idea
- PS1.A
CCC
Reasoning lens
- Scale, Proportion, and Quantity
Evidence map
Rooms connected to MS-PS1-1.
“Primary” means the chapter includes an observable performance and assessable artifact for this expectation; “supporting” builds context.
Connections recorded in the official model
ELA/literacy: RST.6–8.7
Mathematics: MP.2, MP.4, 6.RP.3
California Environmental Principles and Concepts: No direct mapping recorded.
Verified 2026-07-29. Open the official California source.