Free Printable WorksheetScienceGrade 8Science CurriculumLS.8.85

8.85 Cellular Respiration Matter and Energy Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 8 Science worksheet provides structured practice on 8.85 Cellular Respiration Matter and Energy. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Cellular Respiration: Matter and Energy - Which explanation best cellular respiration as a process that releases energy from food molecules and cycles matter with the environment? (NGSS MS‑LS1‑7; CCC: Energy/Matter; TEKS §112.28 Grade 8; FL NGSSS; VA SOL; MA STE)

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 8

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 8.85 Cellular Respiration Matter and Energy skill assessments:

Problem 1Difficulty: Mastery

In a sealed chamber, germinating seeds are placed with a dish of sodium hydroxide (NaOH) that absorbs CO2. After an hour, the pressure in the chamber decreases. "Which explanation best connects this observation to cellular respiration and matter movement?,A. Seeds produce oxygen

Solution & Explanation:so gases are removed. | C. Pressure decreases because energy leaves the chamber as heat. | D. Seeds consume O2 during respiration. They produce CO2

Problem 2Difficulty: Mastery

A graph shows that after a chemical is added, oxygen use by mitochondria decreases and the stored energy difference across the membrane quickly drops. Which explanation best fits the pattern?

AThe chemical makes the membrane leaky while oxygen use increases.

BExtra ADP was added to help mitochondria make more ATP.

CThe chemical speeds up only the first step of breaking down glucose.

DThe chemical blocks the oxygen-using step of respiration, so oxygen use and ATP production drop.

Solution & Explanation:If a chemical blocks the oxygen-using step of aerobic respiration, oxygen use decreases and the mitochondrion cannot keep building the membrane energy difference needed for ATP production.

Problem 3Difficulty: Mastery

A student compares glucose with a fatty acid as food molecules. Which explanation best supports why the fatty acid can lead to more ATP in a simplified respiration model?

AThe fatty acid stores more chemical energy in its bonds, so more energy can be transferred during respiration.

BThe fatty acid yields more ATP because it contains more nitrogen atoms.

CThe fatty acid yields more ATP because it requires no oxygen.

DThe fatty acid yields more ATP because it is already ATP.

Solution & Explanation:A fatty acid can store more chemical energy than one glucose molecule. During respiration, cells can transfer more of that energy into ATP and heat.

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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 8 Science students. It aligns with educational standard LS.8.85 (Trace how cells release usable energy from food during cellular respiration.).