Sound Waves – How Can a Sound Make Something Move?
Our next science unit explores the question: How can a sound make something move? Students will begin by investigating a puzzling phenomenon in which loud music from a truck causes nearby windows to visibly shake. From this shared experience, students will generate questions and develop explanations about what sound is, how it is produced, how it travels, and how it can affect objects at a distance.
During the first portion of the unit, students will investigate how sounds are made. Through hands-on investigations, they will examine what happens when speakers and musical instruments produce sound. They will analyze patterns in vibrations and explore how differences in loudness and pitch relate to how an object moves. Students will represent these ideas using motion graphs and models.
In the second part of the unit, students will explore how sound travels from one place to another. Through experiments and simulations, they will examine what is happening in the matter between a sound source and a receiver. Students will develop and revise models to explain how sound moves through solids, liquids, and gases, and why sound cannot travel through empty space.
In the final portion of the unit, students will investigate how sound transfers energy and how this energy can cause other objects to move. Students will also study how the human ear detects sound, examining how vibrations are ultimately translated into signals the brain can interpret.
Throughout the unit, students will engage in scientific practices such as developing and revising models, analyzing data, amd constructing arguments from evidence. By the end of the unit, students will revisit the original phenomenon and use their accumulated understanding to construct a comprehensive explanation of how sound can make something move.