Students will discuss vibrations, frequency, amplitude, and wavelength. They will observe instruments, hypothesize how sound waves are created, and experiment with creating sound.
Students will experiment to identify how vibrations cause sound. A student worksheet is provided.
This lesson is designed to help students understand that vibrations are responsible for the sounds we hear. Additionally, they learn that sound vibrations can travel through different mediums. Students experience vibrations using several of their senses: They feel the vibrations in their throat as they hum music, and on their lips as they play their straw kazoos. They see that when a ruler is struck, it vibrates, producing a sound. Drums are also used to show vibrations, as students watch grains of rice bouncing on the surface of the drum after it has been hit, and a laser pointer creates a laser show in the classroom when reflected off a vibrating mirror. Finally, students design a test that uses their sense of hearing to judge the effectiveness of different solids to transmit sound vibrations.
Sound is energy that travels as a result of vibration. It can be characterized by frequency, loudness, and pitch, and it is measured in decibels.
The classroom resource provides a video that will explain sound energy, how it moves, and how it is measured. This resource can provide background information for students before they create their own models and conduct their own experiments. There is also a short test that can be used to assess students' understanding.
The teacher will present an informational text from the website, ReadWorks. The students and teacher can interact with this non-fiction text by annotating the text digitally. The students will answer the questions associated with the article as an assessment. This learning activity can be used as an introduction to sound waves, serve as reinforcement after students have already learned this concept, or be used as an assessment at the conclusion of a lesson. This article will describe an experiment that can be performed for students to view the motion of sound waves.
The teacher will present an informational text from the website, ReadWorks. The students and teacher can interact with this non-fiction text by annotating the text digitally. The students will answer the questions associated with the article as an assessment. This learning activity can be used as an introduction to sound waves, serve as reinforcement after students have already learned this concept, or be used as an assessment at the conclusion of a lesson. This informational text could provide background knowledge before students perform an experiment using a guitar.