Pollution Pathways and Ecosystem Impacts is a Grade 7 Science resource for Interactions and Ecosystems that examines how pollutants enter ecosystems and affect organisms and food web interactions. Students explore nutrient runoff, hydrocarbons, airborne deposition, bioaccumulation, and biomagnification while connecting pollution pathways to ecological effects.

From Pollution Pathways to Ecosystem Effects

Students examine how different pollutants can move into aquatic and terrestrial ecosystems through nutrient runoff, hydrocarbons, and airborne deposition. They then consider what happens after pollutants enter an ecosystem, including effects on organism health and food web interactions.

The resource gives particular attention to bioaccumulation and biomagnification, helping students identify how these processes relate to pollution in aquatic and terrestrial systems. A reading passage also asks students to use evidence to answer questions about the effects of pollution, connecting scientific information with evidence-based reasoning.

Question Types and Student Practice

The worksheet includes multiple-choice questions, true-false questions, short-answer questions, a reading passage, matching, a cloze passage, an essay, and a Did You Know feature. This combination gives students opportunities to recognize key ideas, explain ecological relationships, work with scientific vocabulary, interpret information from a passage, and communicate their reasoning in writing.

Included Teacher and Student Support

• Student worksheet focused on pollution pathways and ecosystem impacts
• Student Notes & Lesson Summary supplement for reinforcing the lesson concepts
• Separate Teacher Guide with Learning Objectives, Teaching Tips, Discussion Questions, and Common Mistakes

Practical Classroom Use

Use this Grade 7 ecosystems worksheet after direct instruction as independent practice, a lesson review, or a structured classroom assignment. The reading component provides an opportunity to connect pollution concepts with evidence, while the varied response formats let students demonstrate their understanding in more than one way.

For instruction within the Alberta framework, the resource keeps students focused on concrete ecological relationships: how pollutants enter ecosystems, how they affect organisms and food webs, and how bioaccumulation and biomagnification help explain pollution impacts. The accompanying notes and teacher guide provide additional support for lesson delivery, classroom discussion, and addressing common mistakes.