Free Printable WorksheetScienceGrade 7Science CurriculumMS-LS2-3

7.38 Matter Cycling and Energy Flow in Ecosystems Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 7 Science worksheet provides structured practice on 7.38 Matter Cycling and Energy Flow in Ecosystems. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Matter Cycling and Energy Flow in Ecosystems - Which ecosystem model best represents matter cycling and energy flow between living and nonliving parts? (NGSS MS‑LS2‑3)

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 7.38 Matter Cycling and Energy Flow in Ecosystems skill assessments:

Problem 1Difficulty: Mastery
Which ecosystem model is best aligned to MS-LS2-3?
AA model that shows only predator-prey arrows among animals
BA model that says matter disappears when organisms die and energy cycles forever
CA model that shows sunlight entering producers, matter moving through consumers and decomposers, and materials returning to air, water, or soil
DA model that shows rocks, clouds, and sunlight but no organisms
Solution & Explanation:The best model includes both living and nonliving parts, shows matter cycling, and shows energy flowing into and through the system.
Problem 2Difficulty: Mastery
Use the meadow model to answer the question. Which missing arrow is most important for completing matter cycling?
Ahawk -> cloud
Bsoil -> sunlight
Cdead grass and animal waste -> decomposers
DSun -> hawk
Solution & Explanation:That missing arrow shows how matter from organisms returns to decomposers instead of stopping at consumers.
Problem 3Difficulty: Mastery
Use the graph to answer the question. Why do herbivore numbers decline after decomposers are removed?
AHerbivores depend only on decomposers for food, not on plants.
BPredators become producers after decomposers are removed.
CSoil nutrients drop, plant growth falls later, and herbivores then have less food matter and energy available.
DRemoving decomposers causes sunlight to disappear immediately.
Solution & Explanation:The delayed decline matches the idea that decomposers support plant growth, which supports herbivores.

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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 7 Science students. It aligns with educational standard MS-LS2-3 (Primary standard selected for prompt fields in this prompt cell: NGSS MS-LS2-3. Skill statement in this prompt cell: Which ecosystem model best represents matter cycling and energy flow between living and nonliving parts? Associated standards listed with this skill in this prompt cell: NGSS MS-LS2-3. Use this prompt-provided wording as the supporting standard description for this workflow.).

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