Free Printable WorksheetScienceGrade 7Science CurriculumSCI.7.32

7.32 Conservation of Matter in Organisms Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 7 Science worksheet provides structured practice on 7.32 Conservation of Matter in Organisms. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Conservation of Matter in Organisms - Which statement best supports conservation of matter in a biological process? (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 7.32 Conservation of Matter in Organisms skill assessments:

Problem 1Difficulty: Mastery

Advanced model: A team evaluates whether its egg development model conserves matter by tracing atoms across organism inputs, body materials, wastes, and gases using a model-revision checklist. A bird embryo develops inside an egg before hatching. Which statement about matter is best?

AAtoms from the yolk and albumen are rearranged into the embryo, carbon dioxide, water, and wastes. (based on the evidence)

BMatter is created from energy whenever the organism grows. (based on the evidence)

CThe process changes atoms into pure energy instead of rearranging them. (based on the evidence)

DAtoms disappear when food or water is used by the organism. (based on the evidence)

Solution & Explanation:Embryo growth uses stored food matter and exchanges gases through the shell. Conservation of matter means atoms are transferred and rearranged among molecules; they are not created from nothing or destroyed, even when matter enters or leaves an organism.

Problem 2Difficulty: Mastery

Advanced model: A team evaluates whether its compost mass model conserves matter by tracing atoms across organism inputs, body materials, wastes, and gases using a model-revision checklist. A compost bin loses mass over time while air can move through it. Which explanation best fits conservation of matter?

ADecomposers release some atoms as carbon dioxide and water vapor, and other atoms remain in compost material.

BMatter is lost because biological processes use it up completely.

CThe organism can grow without taking in atoms from the environment.

DFood molecules turn into energy with no atoms left in products.

Solution & Explanation:When matter leaves an open system as gases or vapor, the remaining mass can decrease while atoms are conserved. Conservation of matter means atoms are transferred and rearranged among molecules; they are not created from nothing or destroyed, even when matter enters or leaves an organism.

Problem 3Difficulty: Mastery

Advanced model: A team evaluates whether its sweating model conserves matter by tracing atoms across organism inputs, body materials, wastes, and gases using a model-revision checklist. A runner drinks water and later sweats. What matter pathway is shown?

ASunlight or motion becomes new atoms in the organism. (based on the evidence)

BThe total kinds and numbers of atoms do not need to be tracked. (based on the evidence)

CAtoms stop existing when they leave the organism as waste or gas. (based on the evidence)

DWater matter enters the body and some leaves as liquid sweat or water vapor. (based on the evidence)

Solution & Explanation:Phase changes and body processes move water matter without destroying it. Conservation of matter means atoms are transferred and rearranged among molecules; they are not created from nothing or destroyed, even when matter enters or leaves an organism.

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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 SCI.7.32 (Grade 7 science practice focused on conservation of matter in organisms.).