1. The document outlines an 8 minute class activity where students will complete warm-up questions with their partner, take guided notes on sound waves and electromagnetic radiation, and use light and sound as tools. 2. The next section discusses how echolocation, sonar, and ultrasound use reflected sound waves and how lasers produce coherent, monochromatic light through stimulated emission. 3. Applications of lasers and other electromagnetic waves are then outlined, including cutting, surgery, barcodes, communications, and disinfection. The class will end by working with partners on a joke activity.