Lubrication & Cooling Systems Phenomena-Based Lesson: Hydrodynamic Oil Wedge Degradation, Viscosity Breakdown, and Cylinder Fin Fouling Presentation | Small Gas Engine | 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 Small Gas Engine (grades 9–12) chapter Lubrication & Cooling Systems, built around the phenomenon Hydrodynamic Oil Wedge Degradation, Viscosity Breakdown, and Cylinder Fin Fouling. It is sold separately from the other two parts of the set.

• What's inside: Student Slide Show (editable .pptx + PDF, 23 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 Small Gas Engine, grades 9–12.

Sample question“Why can grass clippings clogging an air-cooled engine's cooling fins cause its lubricating oil to turn into thin black water, welding the connecting rod to the crankshaft?”

Complete the set: Lubrication & Cooling Systems Phenomena-Based Lesson: Hydrodynamic Oil Wedge Degradation, Viscosity Breakdown, and Cylinder Fin Fouling Teacher Discussion Guide; Lubrication & Cooling Systems Phenomena-Based Lesson: Hydrodynamic Oil Wedge Degradation, Viscosity Breakdown, and Cylinder Fin Fouling Student Response Sheet. Scaffolded version: Lubrication & Cooling Systems Scaffolded Phenomena-Based Lesson: Hydrodynamic Oil Wedge Degradation, Viscosity Breakdown, and Cylinder Fin Fouling Presentation.