This lesson describes how sound is reflected, transmitted, and absorbed, focusing on applications in technology like SONAR and in animals like echolocation. It is part of a five-lesson series on Waves and Electromagnetic Radiation (click for bundle). This lesson supports MS-PS4 (Waves and their Applications) of the NGSS. The handout and included answer key work together with videos and links found at Reflection, Transmission and Absorption of Sound on the How About Science? website. H