Free Printable WorksheetScienceGrade 7Science CurriculumMS-PS1-4

7.74 Particle Model of Matter and States Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 7 Science worksheet provides structured practice on 7.74 Particle Model of Matter and States. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Particle Model of Matter and States - Which particle model best explains a change of state due to thermal energy transfer? (NGSS MS‑PS1‑4; IXL K, J)

Whether you are an educator preparing classroom handouts, a tutor reinforcing weekly topics, or a parent supporting homeschool learning, this printable resource gives students the deliberate practice required to achieve subject fluency and master state standards.

Grade

Grade 7

Subject

Science

Domain

Science Curriculum

Formats

PDF & DOCX

Sample Practice Problems

Preview the types of problems and questions covered in this worksheet

Below are sample questions representative of the exercises included on this worksheet and related 7.74 Particle Model of Matter and States skill assessments:

Problem 1Difficulty: Mastery

A class is asked to develop a model for a pure substance as thermal energy is added or removed. Which feature must the best model include?

AA claim that temperature can never stay constant during heating or cooling

BA prediction of how particle motion, spacing, and state change while the particles remain the same substance

CA picture showing that particles disappear whenever the state changes

DA rule that only solids and gases can be modeled with particles

Solution & Explanation:MS-PS1-4 models should predict how heating or cooling changes particle motion, spacing, temperature, and state without changing the identity of the substance.

Problem 2Difficulty: Mastery

Which summary best explains how thermal energy transfer can change state without changing particle identity?

AEvery change of state creates new particles with new formulas.

BThermal energy changes the size of each particle until it fits a new state.

CParticle identity changes only when the temperature stays constant.

DAdding or removing thermal energy changes particle motion and spacing, so the same particles can move among solid, liquid, and gas states.

Solution & Explanation:Phase changes are physical changes. The same particles remain present while their motion, spacing, and arrangement respond to energy transfer.

Problem 3Difficulty: Mastery

A student models deposition by drawing liquid droplets first and then ice crystals. Under what condition would that model need revision?

AWhen evidence shows the gas changed directly to solid without any liquid stage

BWhen particles remain the same substance throughout the change

CWhen the temperature stays constant during the change

DWhen the model is drawn with arrows to show motion

Solution & Explanation:Deposition is a direct gas-to-solid change. If no liquid stage is observed, a model that includes droplets would need revision.

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Frequently Asked Questions

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QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Grade 7 Science students. It aligns with educational standard MS-PS1-4 (Primary standard selected for prompt fields in this prompt cell: NGSS MS-PS1-4. Skill statement in this prompt cell: Which particle model best explains a change of state due to thermal energy transfer? Associated standards listed with this skill in this prompt cell: NGSS MS-PS1-4; IXL K, J. Use this prompt-provided wording as the supporting standard description for this workflow.).