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

Bring earthquake engineering, lateral shear force resistance, triangular cross-bracing geometry, center of mass control, aspect ratio calculations, and seismic testing to life with the Back to School STEM Activity: Straw Tower Earthquake Challenge (BTS12)! Designed for Middle School Physical Science, Earth Science, Civil Engineering, Math, Homeroom, and STEM classes across Grades 6–8, this 2-page, print-ready lab packet challenges student teams to engineer 30 cm tall free-standing straw towers capable of surviving a 10-second seismic shake test.

What Is Included in This 2-Page Packet?

• 🏗️ Page 1: Student Mission Card & Blueprint

  Hooks students with a real-world earthquake hazard and civil engineering scenario. Includes strict material and design limits (20 drinking straws, 50 cm masking tape, 30 cm minimum height rule, unattached free-standing base, 10-second shake survival test) alongside a dedicated Seismic Tower & Cross-Bracing Blueprint workspace to sketch triangular trusses and base footprint geometries.

• 📊 Page 2: Testing Log & Scientific Reflection

  Features a structured lab testing table tracking base shape strategy, final tower height in centimeters (cm), and 10-second seismic shake test survival results across 3 prototype trials. Includes an applied math section to compute Height-to-Base Aspect Ratios (Aspect Ratio = Height / Base Width) to evaluate structural balance, followed by engineering reflection questions evaluating triangulation rigidity, dampening flexibility, center of mass stabilization, and structural failure modes.

Educational Value & Key Benefits:

• Hands-On Seismic Physics: Demonstrates how cross-bracing and wide base geometry dissipate lateral shear forces during simulated earthquakes.

• Integrates Applied Math & Aspect Ratios: Teaches students how to calculate geometric height-to-base ratios to predict structural tipping points.

• Low-Cost High-Energy STEM: Uses simple classroom supplies like plastic straws and masking tape for an active, engaging physical and Earth science challenge across Grades 6–8.