Learning Target 3 Understand how the properties of a medium affect the speed of sound.

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Presentation transcript:

Learning Target 3 Understand how the properties of a medium affect the speed of sound.

What does the speed of sound depend on? The speed of sound depends on the elasticity, density, and temperature of the medium the sound travels through.

How does the elasticity affect the speed of sound? Elasticity is the ability of a material to bounce back after being disturbed. The more elastic a medium, the faster sound travels in it. Sounds can travel well in solids, which are usually more elastic than liquids or gases. The particles of a solid do not move very far, so they bounce back and forth quickly as the compressions and rarefactions of the sound waves pass by. Most liquids are not very elastic. Sound does not travel as well in liquids as it does in solids. Gases generally are not very elastic. Sound travels slowly in gases.

How does density affect the speed of sound? Density is how much matter, or mass, there is in a given amount of space, or volume.

How does density affect the speed of sound? In materials in the same state of matter—solid, liquid, or gas—sound travels more slowly in denser mediums. The particles of a dense material do not move as quickly as those of a less dense material. Sound travels more slowly in dense metals, such as lead or silver, than in iron or steel. hehe

How does temperature affect the speed of sound? In a given medium, sound travels more slowly at lower temperatures than at higher temperatures. Why? At a low temperature, the particles of a medium move more slowly than at a high temperature. So, they are more difficult to move, and return to their original positions more slowly.

Learning Target 4 Understand how the properties of a medium affect the speed of sound.

https://www.youtube.com/watch?v=GkiZhieigqE