# MS-PS1-5 Matter and its Interactions

MS-PS1-5   Matter and its Interactions

Students who demonstrate understanding can:

MS-PS1-5. Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved. [Clarification Statement: Emphasis is on law of conservation of matter and on physical models or drawings, including digital forms, that represent atoms.] [Assessment Boundary: Assessment does not include the use of atomic masses, balancing symbolic equations, or intermolecular forces.]
The performance expectation above was developed using the following elements from the NRC document A Framework for K-12 Science Education:

## Science and Engineering Practices

### Developing and Using Models

Modeling in 6–8 builds on K–5 and progresses to developing, using and revising models to describe, test, and predict more abstract phenomena and design systems.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

### Science Models, Laws, Mechanisms, and Theories Explain Natural Phenomena

• Laws are regularities or mathematical descriptions of natural phenomena.

## Crosscutting Concepts

### Energy and Matter

Connections to other DCIs in this grade-band:

Common Core State Standards Connections:

RST.6-8.7 ELA/Literacy - Integrate quantitative or technical information expressed in words in a text with a version of that information expressed visually (e.g., in a flowchart, diagram, model, graph, or table). (MS-PS1-5) Mathematics - Reason abstractly and quantitatively. (MS-PS1-5) Model with mathematics. (MS-PS1-5) Use ratio and rate reasoning to solve real-world and mathematical problems. (MS-PS1-5)

MS-PS1-5   Matter and its Interactions

Students who demonstrate understanding can:

MS-PS1-5. Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved. [Clarification Statement: Emphasis is on law of conservation of matter and on physical models or drawings, including digital forms, that represent atoms.] [Assessment Boundary: Assessment does not include the use of atomic masses, balancing symbolic equations, or intermolecular forces.]
The performance expectation above was developed using the following elements from the NRC document A Framework for K-12 Science Education:

## Science and Engineering Practices

### Developing and Using Models

Modeling in 6–8 builds on K–5 and progresses to developing, using and revising models to describe, test, and predict more abstract phenomena and design systems.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

### Science Models, Laws, Mechanisms, and Theories Explain Natural Phenomena

• Laws are regularities or mathematical descriptions of natural phenomena.

## Crosscutting Concepts

### Energy and Matter

Connections to other DCIs in this grade-band:

Common Core State Standards Connections:

RST.6-8.7 ELA/Literacy - Integrate quantitative or technical information expressed in words in a text with a version of that information expressed visually (e.g., in a flowchart, diagram, model, graph, or table). (MS-PS1-5) Mathematics - Reason abstractly and quantitatively. (MS-PS1-5) Model with mathematics. (MS-PS1-5) Use ratio and rate reasoning to solve real-world and mathematical problems. (MS-PS1-5)

MS-PS1-5   Matter and its Interactions

Students who demonstrate understanding can:

MS-PS1-5. Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved. [Clarification Statement: Emphasis is on law of conservation of matter and on physical models or drawings, including digital forms, that represent atoms.] [Assessment Boundary: Assessment does not include the use of atomic masses, balancing symbolic equations, or intermolecular forces.]
The performance expectation above was developed using the following elements from the NRC document A Framework for K-12 Science Education:

## Science and Engineering Practices

### Developing and Using Models

Modeling in 6–8 builds on K–5 and progresses to developing, using and revising models to describe, test, and predict more abstract phenomena and design systems.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

### Science Models, Laws, Mechanisms, and Theories Explain Natural Phenomena

• Laws are regularities or mathematical descriptions of natural phenomena.

## Crosscutting Concepts

### Energy and Matter

Connections to other DCIs in this grade-band: