This product entirely in French from Chez Nathalie is a unit on sound. There are a variety of texts, diagrams, activities and answer keys on sound sources, sound waves, audible and inaudible sounds, human hearing, reflection, refraction, diffraction and more. This document also contains an experiment and a quiz. Specifically, this product contains:1 – Title Page 2 – Table of Contents 3 – Properties of Sound 4-6 – Natural and Artificial Sounds + Activity + Answer Key 7-10 – Sound Propagation +