Hook your students with one of the coolest natural phenomena on Earth: sand dunes that “sing.” This high-interest nonfiction reading explains how dunes produce real booming/whistling sounds and connects the phenomenon to mechanical waves and wave properties (frequency, amplitude, wavelength). It includes 10 rigorous comprehension questions AND a complete answer key, making it perfect for zero-prep sub plans, early finishers, or a phenomenon-based lesson opener. ✅ What’s Included 7-pag