Free Printable WorksheetScienceGrade 9Science CurriculumNGSS HS-PS1-1, HS-PS1-3

9.14 Pure Substances and Mixtures Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Physical Science with Earth and Science Science worksheet provides structured practice on 9.14 Pure Substances and Mixtures. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Pure Substances and Mixtures: MCQ focus: identify elements, compounds, homogeneous mixtures, and heterogeneous mixtures using particle diagrams and examples. Aligned to NGSS high school Physical Science, Earth and Space Science, and Engineering Design; NRC/DCI; SEP/CCC; CCSS math/literacy connections; selected CA NGSS, NYSSLS, Florida CPALMS, and Texas TEKS references NGSS HS-PS1-1, HS-PS1-3 - NGSS-aligned Pure Substances and Mixtures: NGSS: HS-PS1-1; HS-PS1-3; NRC/DCI: PS1.A; SEP/CCC: Developing models / Patterns; Common: RST.9-10.7; State refs: CA/NYSSLS same HS-PS PE family; FL SC.912.P.8; TX IPC matter strand.

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

Physical Science with Earth and Science

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 9.14 Pure Substances and Mixtures skill assessments:

Problem 1Difficulty: Mastery

Use the four-quadrant particle chart shown. Which classification best fits Sample FF?

ACompound, because two particle types are included.

BHomogeneous mixture, because every quadrant contains at least one particle.

CHeterogeneous mixture, because different regions have different proportions of particle types.

DElement, because each particle is unbonded.

Solution & Explanation:A homogeneous mixture would have similar proportions in every region. The unequal quadrant compositions show a heterogeneous mixture.

Problem 2Difficulty: Mastery

A clear mouthwash contains water, flavor molecules, dye, and other dissolved ingredients evenly distributed in one liquid phase. What is the best classification?

AElement, because the liquid is transparent.

BHomogeneous mixture, because multiple dissolved substances are uniformly mixed.

CCompound, because the ingredients cannot be seen separately.

DHeterogeneous mixture, because more than one substance is listed.

Solution & Explanation:The mouthwash is a homogeneous mixture because its ingredients are physically mixed and uniform throughout the liquid.

Problem 3Difficulty: Mastery

A gas cylinder contains methane, CH4, with the same molecule in every particle. Each molecule has carbon bonded to hydrogen. What is the best classification?

AHeterogeneous mixture, because each molecule has different atom types.

BElement, because methane is a pure gas.

CCompound, because carbon and hydrogen are chemically bonded in a fixed ratio.

DHomogeneous mixture, because carbon and hydrogen are evenly present.

Solution & Explanation:Methane is a compound because its particles contain different elements bonded together as identical CH4 molecules.

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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 Physical Science with Earth and Science Science students. It aligns with educational standard NGSS HS-PS1-1, HS-PS1-3 (NGSS: HS-PS1-1; HS-PS1-3; NRC/DCI: PS1.A; SEP/CCC: Developing models / Patterns; Common: RST.9-10.7; State refs: CA/NYSSLS same HS-PS PE family; FL SC.912.P.8; TX IPC matter strand.).