SoUNd

(a)   is a wave which propagates through a specific medium.

(a)   is a repeated sound reflected from a hard surface.

It is produced by vibrations.

(a)  

The vibrations of the strings from a violin produce .

(a)  

When a sound wave hits a hard surface and it cannot pass through,

the sound bounces back.

True or False

(a)  

•The bouncing back of the sound is called the (a)   .

•When a reflected sound bounces back towards the source, an echo can occur.

True or False

(a)  

(a)   is a repeated sound reflected from a hard surface.

•When sound is reflected from the hard surface  of a smaller space, the sound may bounce off walls several times, producing multiple echoes.

This kind of reflected sound is called (a)  

• (a)   is the use of reflected sound to locate an object.