Free Printable WorksheetScienceGrade 9Science CurriculumNGSS HS-PS3-2, HS-PS3-4

9.17 Phase Changes and Heating Cooling Curves 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 9.17 Phase Changes and Heating Cooling Curves. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Phase Changes and Heating-Cooling Curves: MCQ focus: identify melting, freezing, vaporization, condensation, sublimation, and deposition on diagrams and heating curves. 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-PS3-2, HS-PS3-4 - NGSS-aligned Phase Changes and Heating-Cooling Curves: NGSS: HS-PS3-2; HS-PS3-4; prerequisite MS-PS1-4; NRC/DCI: PS3.A-B; SEP/CCC: Analyzing data / Energy and matter; Common: HSN-Q.A; 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 9.17 Phase Changes and Heating Cooling Curves skill assessments:

Problem 1Difficulty: Mastery

Use the graph. Segment H-I is horizontal and labeled liquid plus gas while heat is added. Which statement best describes the particles during H-I?

AAll particles are fixed in a solid lattice.

BGas particles become closer together to form liquid.

CSome particles remain liquid while others escape into the gas phase.

DThe sample's chemical bonds form a new substance.

Solution & Explanation:During vaporization, liquid and gas coexist. Energy helps particles separate into the gas phase without changing chemical identity.

Problem 2Difficulty: Mastery

Use the graph. Segment N-O is horizontal and labeled solid plus liquid while the graph is read right to left as cooling. Which phase change is occurring on N-O?

AFreezing

BMelting

CSublimation

DVaporization

Solution & Explanation:The segment has solid and liquid together at the melting/freezing point. Because the graph is being read as cooling, liquid becomes solid by freezing.

Problem 3Difficulty: Mastery

A scientist records energy leaving a gas sample while its temperature remains constant as crystals form. Which explanation best fits the data?

AVaporization is occurring because liquid changes to gas while absorbing energy.

BDeposition is occurring because gas changes directly to solid while releasing energy.

CMelting is occurring because solid changes to liquid while releasing energy.

DSublimation is occurring because solid changes directly to gas while absorbing energy.

Solution & Explanation:Crystals forming from a gas with energy leaving indicates deposition. The temperature plateau is consistent with a phase change.

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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-PS3-2, HS-PS3-4 (NGSS: HS-PS3-2; HS-PS3-4; prerequisite MS-PS1-4; NRC/DCI: PS3.A-B; SEP/CCC: Analyzing data / Energy and matter; Common: HSN-Q.A; RST.9-10.7; State refs: CA/NYSSLS same HS-PS PE family; FL SC.912.P.8; TX IPC matter strand.).