Unit: Sound and Light Lesson 1 “The Nature of Sound” Essential Questions: 1.) What is sound? 2.) What factors affect the speed of sound?
What is sound? Sound is a disturbance that travels through a medium as a longitudinal wave
A sound wave begins with a vibration Sound often travels through air, but it can also move through solids and liquids too Sound waves can bend around objects
What factors affect the speed of sound? Temperature Sound travels slower at colder temperatures
Stiffness Sound travels faster in solids than in liquids and gases
Density Sound travels slower in denser materials