This Physical Science Waves unit lesson focuses on sound waves: compression, rarefaction, frequency, amplitude, pitch, echo and speed of sound. This 60-90 science complete lesson includes set of differentiated notes, warm-ups, an activity for students to demonstrate their understanding, a slide presentation on the lesson, and a mini quiz built into the presentation (PDF). This product is part of my Waves Complete Interactive Notebook.★★★Check out my complete Physical Science Year Bundle! ★★★Wave