How does activity change heart rate? In this inquiry lab, students design a fair test, collect BPM data (watch/sensor or manual count), and graph results to explain patterns using CER. Great for PE crossovers, biology, or a winter wellness mini-unit. 🫀⏱️📈 What students do 🧠 Define the problem: plan a fair test (IV = activity, DV = BPM, controls = timing/posture/method). 🔬 Measure pulse: resting → activity (e.g., jacks/jog/fast walk); repeat 3 trials and average. 📊 Graph & analyze: B