Sound Vibrations

Why does cupping your hands around your mouth when you shout make the sound travel further?

• The sound spreads out.
• Your voice gets louder.
• You are screaming.
• The sound energy is directed in one direction.

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When you hit a tuning fork on a piece of wood, it makes a sound because it is __________________.

• doesn't move

• vibrates

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the movement in sound that allows us to hear

• dancing

• bouncing

• vibration

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NGSS.4-PS3-2

NGSS.4-PS4-1

All sound _______

• is loud

• vibrates

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When matter moves in a back and forth motion, the movement is known as

• Pitch

• Wave

• Vibration

• String

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Sound does not travel in space because

• Space is too far away.

• There is no matter in space.

• Space is the final frontier

• Space has planets.

An object that does not vibrate cannot produce

• sound
• light
• heat
• electricity

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NGSS.4-PS3-2

Sound is a form of?

• energy

• pitch

• volume

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Frequency in sound waves is best defined as

• the highest sound

• number of vibrations per second

• The lowest sound

• how long the strings are on an instrument

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NGSS.4-PS4-1

What is frequency?

• the number of vibrations per second
• how high or low a sound is
• the loudness or softness of a sound
• the back and forth movement of matter

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