The Science of Sound

What is sound?

• Sound is actually light bouncing off of walls

• Sound is when a person or thing makes noise

• Sound is a form of energy that travels in waves (for us to hear)

• Sound is caused by vibrations

Which picture is measuring volume?

• 
• 

The frequency of a sound wave determines...

• Volume (loudness or softness)

• Pitch (highness or lowness)

• Timbre (what it sounds like)

• How much hearing loss someone suffers

What is vibration?

• how loud a sound is
• the back and forth movement of matter
• how high or low a sound is
• the loudness or softness of a sound

Tags

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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

Tags

NGSS.4-PS4-1

A longer string makes a _______ pitch than a short string.

• louder
• softer
• higher
• lower

Tags

NGSS.4-PS4-1

An object that does not vibrate cannot produce

• sound
• light
• heat
• electricity

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When doing the straw experiment, what happened when you cut the end of the "kazoo"?

• The volume got louder

• The volume got softer

• The pitch got lower

• The pitch got higher

What happened during the spoon and string experiment?

• When I hit the spoon against the desk, nothing happened

• When I hit the spoon against the desk, I could hear a "bell" sound

• When I hit the spoon against the desk, I felt a vibration on the string

• When I hit the spoon against the desk, it sounded like a kazoo

Which unit can be used to measure sound's frequency?

• Centimeters

• Hertz

• Hurts

• Meters