Free Printable WorksheetScienceGrade 7Science CurriculumMS-LS1-7

7.29 Cellular Respiration as Chemical Reactions Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 7 Science worksheet provides structured practice on 7.29 Cellular Respiration as Chemical Reactions. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Cellular Respiration as Chemical Reactions - Which model best shows matter rearrangement and energy release during cellular respiration? (NGSS MS‑LS1‑7)

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 7.29 Cellular Respiration as Chemical Reactions skill assessments:

Problem 1Difficulty: Mastery

A planned final diagram compares four candidate models of cellular respiration for a body cell. Which model should be chosen as the best scientific model?

Athe one that shows glucose and oxygen as reactants, carbon dioxide and water as products, conserved atoms, and released energy as matter moves through the organism

Bthe one that shows glucose turning only into energy and oxygen disappearing

Cthe one that focuses on cell shape only and leaves out molecules and energy

Dthe one that shows carbon dioxide as the only reactant and glucose as the only product

Solution & Explanation:The strongest model for this skill shows the correct reactants and products, conserves atoms, includes energy release, and represents matter moving through the organism.

Problem 2Difficulty: Mastery

Which statement best describes how atoms are rearranged during cellular respiration?

AOnly carbon atoms move into products, while hydrogen and oxygen are destroyed.

BCarbon becomes energy, hydrogen disappears, and oxygen stays unchanged as a gas.

CAll atoms from oxygen become water, and all atoms from glucose become pure heat.

DCarbon from glucose becomes part of carbon dioxide, hydrogen from glucose becomes part of water, and oxygen atoms end up in both product molecules.

Solution & Explanation:A correct model tracks where each type of atom goes. The atoms are rearranged into carbon dioxide and water, and energy is released.

Problem 3Difficulty: Mastery

Two students debate whether the heat released during cellular respiration proves that matter disappeared. Which response is best?

ANo, because cellular respiration does not involve any energy changes at all.

BHeat shows that energy was released, but the atoms are still present in carbon dioxide and water.

CYes, heat always means atoms vanish from the system.

DYes, because released energy replaces the missing carbon atoms.

Solution & Explanation:Energy release does not mean matter disappeared. The atoms from reactants are rearranged into product molecules.

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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-LS1-7 (Primary standard selected for prompt fields in this prompt cell: NGSS MS-LS1-7. Skill statement in this prompt cell: Which model best shows matter rearrangement and energy release during cellular respiration? Associated standards listed with this skill in this prompt cell: NGSS MS-LS1-7. Use this prompt-provided wording as the supporting standard description for this workflow.).