Trophic Cascades: Apex Predators, Keystone Species, and Gray Wolf Reintroduction in Yellowstone CER Phenomena Worksheet | Biology | Grades 9–12

Trophic Cascades: Apex Predators, Keystone Species, and Gray Wolf Reintroduction in Yellowstone CER Phenomena Worksheet is a Claim-Evidence-Reasoning phenomena worksheet for high school Biology (grades 9–12) on Trophic Cascades: Apex Predators, Keystone Species, and Gray Wolf Reintroduction in Yellowstone (chapter: Principles of Ecology).

Pairs with: Principles of Ecology Slide Show Presentation; Principles of Ecology Guided Notes; Principles of Ecology Lesson Quiz; Principles of Ecology Unit Test.

Sections: National Teaching Standard & Investigation Objective; Investigation Evidence Dossier (documents 1–5); Document-based Scientific Writing Prompt (dbq); Student CER Writing Response Section; 4-point Analytic CER Scoring Rubric; 1. Exemplary Model Thesis / Claim:; 2. Designated Evidence Points From Documents:; 3. Comprehensive Scientific Reasoning:. Sample item: “Teacher: _______________________”

What's inside: Trophic Cascades: Apex Predators, Keystone Species, and Gray Wolf Reintroduction in Yellowstone CER Worksheet (editable .docx + PDF, about 1,619 words, 7 pages); answer key / model answers for the teacher.

Standards: HS-LS2-1 — Use mathematical and/or computational representations to support explanations of factors that affect carrying capacity of ecosystems at different scales. HS-LS2-4 — Use mathematical representations to support claims for the cycling of matter and flow of energy among organisms in an ecosystem. HS-LS2-5 — Develop a model to illustrate the role of photosynthesis and cellular respiration in the cycling of carbon among the biosphere, atmosphere, hydrosphere, and geosphere.

Resource type: CER Phenomena Worksheet. Format: editable Microsoft Word file plus a ready-to-print PDF.

Classroom use: Students read the case, analyze the data, and write a CER argument; a model answer and scoring guide are included. Built for high school Biology, grades 9–12.

Format note: These files are delivered in Microsoft Office formats (Word and/or PowerPoint). If you open a worksheet that includes tables in Apple Pages or another non-Microsoft app, table formatting may not display correctly. For best results, use Microsoft Word or PowerPoint (or upload the file to Google Docs). If you run into any formatting issues, contact us and we can send a PDF version.