Free Printable WorksheetScienceGrade 8Science CurriculumSCI.8.81

8.81 Cell Transport Diffusion and Osmosis Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 8 Science worksheet provides structured practice on 8.81 Cell Transport Diffusion and Osmosis. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Cell Transport: Diffusion and Osmosis - Which explanation best diffusion and osmosis across semi‑permeable membranes and predict direction of water movement in simple scenarios? (NGSS MS‑LS1‑2; CCSS RST.6–8.7; 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 8.81 Cell Transport Diffusion and Osmosis skill assessments:

Problem 1Difficulty: Mastery

A dialysis tube and the beaker around it are separated by a membrane that lets only water pass. The beaker has a slightly higher concentration of dissolved particles than the tube. Which way does water move?

AToward the beaker (outside)

BNo net movement

CWater direction cannot be known without volume

DToward the tube (inside)

Solution & Explanation:Water moves toward the side with the higher dissolved-particle concentration. Since the beaker is more concentrated, water moves out of the tube and toward the beaker.

Problem 2Difficulty: Mastery

In a three-compartment setup: A and B are separated by a membrane permeable only to water. B and C are separated by a membrane permeable to water and glucose. Solutes: A has 0.30 M sucrose (nonpermeating). B has 0.10 M sucrose (nonpermeating). C has 0.30 M glucose (permeating to B). After a long time, where does water end up moving from B?

AFrom B toward C, because glucose starts higher in C.

BFrom B toward A, because A has more trapped sucrose than B.

CWater moves equally to A and C so B never changes.

DNo net movement because glucose crosses.

Solution & Explanation:Between A and B, only water moves and sucrose is trapped. A (0.30 M sucrose) is more concentrated than B (0.10 M), so water moves from B to A. Glucose between B and C can equalize, so it doesn’t create a lasting pull.

Problem 3Difficulty: Mastery

A cell is placed in a solution that is isosmotic to the cell, but the cell still swells. "What must be true about the solutes in the solution?,A. Some outside solute is permeating

Amaking the solution hypotonic.

BAll solutes are nonpermeating

Solution & Explanation:but if many outside particles can enter

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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 SCI.8.81 (Explain how materials move across cell membranes by diffusion and osmosis.).