P3 P3 SCIENCE 3°

When sound is reflected, it changes direction and loses energy, or intensity.

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Concrete reflects sound very well.

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Fabric curtains only absorb part of the sound and reflect he rest.

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What produces echo?

• When sound waves reflects off a surface and travel back to the listener.

• When we speak loudly,

You can hear echo in a cave.

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You can hear echo a moment later a person shouts or talks.

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When something vibrates produces a ______

• sound

• light

When something vibrates produces a ______

A sound caused by the reflection of sound waves from a surface back to the listener is an _____

• sound

• echo

A sound caused by the reflection of sound waves from a surface back to the listener is an _____