Reaction Mechanisms & Catalysts Phenomena-Based Lesson: Catalytic Destruction of One Hundred Thousand Ozone Molecules by a Single Stratospheric Chlorine Radical Presentation | Chemistry II | Grades 9–12

This is the student-facing slide presentation that introduces the phenomenon, walks the class through observations and driving questions, and frames the evidence students will use for the Phenomena-Based Lesson in the Chemistry II (grades 9–12) chapter Reaction Mechanisms & Catalysts, built around the phenomenon Catalytic Destruction of One Hundred Thousand Ozone Molecules by a Single Stratospheric Chlorine Radical. It is sold separately from the other two parts of the set.

• What's inside: Student Slide Show (editable .pptx + PDF, 22 slides).
• Resource type: Phenomena-Based Lesson – Presentation. Format: editable Microsoft PowerPoint file plus a ready-to-print PDF.

Classroom use: Open with the phenomenon slide show, let students record ideas on the response sheet, and lead the discussion with the teacher guide. Built for Chemistry II, grades 9–12.

Sample question“How can a single catalytic chemical atom tear through hundreds of thousands of stable molecules without ever being consumed or destroyed itself?”

Complete the set: Reaction Mechanisms & Catalysts Phenomena-Based Lesson: Catalytic Destruction of One Hundred Thousand Ozone Molecules by a Single Stratospheric Chlorine Radical Teacher Discussion Guide; Reaction Mechanisms & Catalysts Phenomena-Based Lesson: Catalytic Destruction of One Hundred Thousand Ozone Molecules by a Single Stratospheric Chlorine Radical Student Response Sheet. Scaffolded version: Reaction Mechanisms & Catalysts Scaffolded Phenomena-Based Lesson: Catalytic Destruction of One Hundred Thousand Ozone Molecules by a Single Stratospheric Chlorine Radical Presentation.