Foil Boat Buoyancy STEM Challenge BTS5

Middle School Back to School Icebreaker: 2-page STEM packet on Archimedes’ principle, hull surface area, cargo mass math, & naval teamwork.

Kick off your school year with a classic marine engineering and density challenge! The Foil Boat Buoyancy Challenge (BTS5) challenges middle school students to act as naval architects, designing and folding a cargo hull out of a single square of aluminum foil to hold the maximum possible payload weight before sinking!

Students must apply principles of Archimedes’ Principle, displaced water volume, surface area, and center of gravity while competing to build the highest-capacity vessel in the class.

What Is Included in This 2-Page Packet?

Page 1: Student Mission Card & Blueprint: Real-world naval architecture scenario, clear material limits box (single foil square, zero fasteners, free-floating rule, controlled penny loading), and a dedicated Naval Hull Architecture Blueprint sketching zone for pre-build hull geometry planning (barge vs. box vs. canoe).

Page 2: Testing Log & Scientific Reflection: Structured Data Testing Table (track hull geometries, capacity estimates, and actual pennies supported across 3 trial runs), Applied Math Connection (convert penny counts into total supported cargo mass in grams using 2.5g per penny and calculate estimation variance percentage), and reflection questions analyzing Archimedes’ Principle, water displacement volume, center of gravity stability, and hull failure modes.

Core STEM Skills Covered:

Naval Architecture, Buoyancy & Archimedes’ Principle (Displaced Water Volume)

Center of Gravity, Mass Distribution & Hull Structural Stability

Data Logging, Cargo Mass Math (grams), and Estimation Variance Percentage

Prototyping, Failure Analysis, and Iterative Hull Folding

Why Teachers Love This Resource:

Dollar-Store Friendly & Ultra Low-Prep: Requires only aluminum foil, water tubs, and pennies!

High-Engagement Team Builder: Perfect for the first week of school, introductory density units, or physics warm-ups.

Clean 2-Page Layout: Keeps student hull sketching, mass calculations, and reflection prompts organized on a single front-and-back printable sheet.

Print-Ready: High-resolution, 2-page PDF format ready for instant printing.