Food webs and matter cycles come into focus in this Grade 7 Science learning stations activity built around ecosystem case studies. Students trace ripple effects through food webs, follow the movement of matter and substances through ecosystems, and use evidence to recognize patterns while considering scientific uncertainty.

Follow Changes Through Ecosystems

The station tasks move beyond identifying producers and consumers. Students examine direct and indirect changes in real food webs and consider how an effect in one part of an ecosystem can connect to changes elsewhere. They also explore the movement of nutrients, water, matter, and pollutants, strengthening their ability to reason about interconnected ecosystem processes.

Case-study evidence gives students a concrete basis for identifying effects and patterns rather than treating ecosystem relationships as isolated facts. The work also asks students to recognize scientific uncertainty when interpreting evidence.

What You Receive

• ✔️ Student station recording sheet for collecting evidence and observations
• ✔️ Station wrap-up for bringing ideas together after the rotation
• ✔️ Case-study station cards focused on food webs and matter movement
• ✔️ Teacher Guide included in the Answer Key PDF

The Teacher Guide adds Learning Objectives, Teaching Tips, Discussion Questions, and Common Mistakes, giving you support for introducing the activity, guiding discussion, and addressing likely misconceptions.

Built for Evidence-Based Ecosystem Thinking

Students practice tracing direct and indirect ecosystem changes, explaining how matter moves through living systems, and interpreting evidence from case studies. Key ideas include food webs, nutrients, water movement, pollutant movement, patterns, effects, and scientific uncertainty.

This makes the activity useful when teaching Alberta Grade 7 Interactions and Ecosystems, especially when you want students to connect ecosystem relationships with evidence instead of working only from definitions.

Use It as a Classroom Rotation

Place the case-study cards at stations and have groups record their thinking on the student recording sheet as they rotate. After students complete the stations, use the wrap-up to consolidate their observations and the Teacher Guide discussion questions to support whole-class conversation.

The combination of station work, evidence analysis, and teacher support provides a focused way to explore how changes and substances move through interconnected ecosystems while giving students practice explaining what the available evidence does—and does not—show.