Thanksgiving STEM Activity: Harvest Silo Grain Elevator (THX05)

Bring simple machines, pulley mechanical advantage, axle friction reduction, tension force distribution, cargo balance stability, and mass-distance work calculations to life with the Thanksgiving STEM Activity: Harvest Silo Grain Elevator Challenge (THX05)! Designed for Middle School Physical Science, Physics, Mechanical Engineering, Math, and STEM classes across Grades 6–8, this 3-page, print-ready seasonal lab packet challenges students to engineer pulley-hoist grain elevators attached to harvest silos.

What Is Included in This 3-Page Packet?

• 📋 Page 1: Teacher Guide & Lesson Plan

  Features NGSS alignment (MS-PS3-5 Energy & Mechanical Advantage, MS-ETS1-2 Engineering Design Solutions), key simple machines physics concepts, hoist station setup instructions, math troubleshooting tips, and a full teacher answer key.

• 🌽 Page 2: Student Mission Card & Blueprint

  Hooks students with an agricultural machinery engineering challenge to design mechanical grain elevators for crop storage. Includes material constraints (cardboard silo tube, plastic straws/axles, thread spools, string, paper cup payload bucket, dried corn kernels, strict 25 cm lift height rule) and a dedicated schematic sketching zone to diagram pulley spool placement, string tension vectors, and axle rotational friction points.

• 📊 Page 3: Testing Log & Scientific Reflection

  Features a structured lab data table tracking pulley axle modifications, total corn kernel payload capacity, and hoist smoothness ratings across 3 testing trials. Includes an applied math section to calculate Total Mass-Distance Work Metrics (Work = Mass x Distance) in gram-meters, followed by reflection questions analyzing effort force reduction, mechanical advantage ratios, and bucket center of gravity stabilization.

Educational Value & Key Benefits:

• Hands-On Seasonal Physics: Connects fixed and movable pulley arrangements directly to mechanical advantage and reduced input force requirements.

• Integrates Applied Math & Work Calculations: Teaches students how to record payload mass and vertical displacement distance to compute mechanical work.

• Low-Cost High-Engagement STEM: Uses accessible household items like cardboard tubes, spools, straws, string, and dried corn for an engaging Thanksgiving mechanics lab across Grades 6–8.