Percent Increase and Decrease Quiz
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Pi-Day Catapult — Optimize Angle & Tension (Predict vs. Measure) | MS–HS NGSS
Description (NGSS included) Celebrate Pi-Day with a data-driven projectile challenge! Students tune angle and tension on a simple launcher, then predict vs. measure range and compute percent error. Teams graph Range vs. Angle (and optional Range vs. Pullback) and explain results with CER. 🧠📈 🔬 Investigate: hold one variable constant to fairly test the other. 🧮 Model: use a calibration shot or R ≈ (v²·sin(2θ))/g to predict. 📊 Analyze: compare predicted vs. measured; percent error
3rd - 12th
Engineering, General Science, Physics
Bridge of Love (Truss Strength) — popsicle-stick “arch/Truss” with tensile tests
Design, build, and break (safely!) a popsicle-stick truss/arch bridge to explore tension vs. compression, load paths, and failure modes. Teams prototype, test with a hanging bucket, and compare strength-to-weight for engineering optimization. 💪📈 Students will: 🧠 Plan a design that meets criteria & constraints (span, clearance, materials). 🧪 Build & test a truss/arch using craft sticks and glue; add weight gradually until first crack & max load. 📊 Record & analyze mass, first-crack lo
3rd - 12th
Engineering, General Science, Physics
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