Back to School STEM Activity: Straw Tower Earthquake Challenge (BTS12)

🏗️ Back to School STEM Activity: Straw Tower Earthquake Challenge (BTS12) Test structural stability and earthquake engineering under simulated seismic conditions! The Straw Tower Earthquake Challenge (BTS12) challenges middle school student teams to build a free-standing tower at least 30 cm tall using only straws and tape that can survive a 10-second earthquake shake test. Students learn about seismic forces, triangular cross-bracing, center of mass, and height-to-base aspect ratios while engineering earthquake-resistant structures! 📦 What is Included in This 2-Page Packet: Page 1: Student Mission Card & Blueprint: Real-world earthquake engineering and seismic hazard scenario. Clear material constraints box (20 straws, 50 cm tape, 30 cm minimum height, unattached base, 10-second shake survivability). Dedicated Seismic Tower & Cross-Bracing Blueprint sketching zone for planning triangular trusses and base geometry. Page 2: Testing Log & Scientific Reflection: Structured Data Testing Table: Track base geometry, tower height in centimeters, and shake test survival across 3 prototype tests. Applied Math Connection: Calculate height-to-base aspect ratios (Height / Base Width) to evaluate structural balance and stability. Engineering Reflection Questions: Analyze triangulation vs rectangular frames, center of mass control, and structural flexibility vs rigidity. 📐 Core STEM Skills Covered: Earthquake Engineering, Lateral Shear Forces & Seismic Stability Triangular Cross-Bracing, Base Geometry & Center of Mass Data Logging, Aspect Ratio Calculations, and Height Measurement (cm) Iterative Prototyping and Failure Analysis 💡 Why Teachers Love This Resource: High-Energy Hands-On Testing: Students love watching their towers endure the 10-second shake test! Low-Cost Materials: Uses simple plastic drinking straws and masking tape. Clean 2-Page Layout: Keeps student blueprints, aspect ratio math, and reflections organized on a single front-and-back printable sheet. Format: High-resolution, print-ready PDF format (2 Pages).