PhET Sound

WARNING: This activity involves steady tones at various frequencies and amplitudes that might bother some individuals and could potentially damage hearing. It is recommended that for this activity you use headphones with your volume turned down to a lower level.

Do you agree to be safe and respectful of yourself and others with this activity?

• YES

• NO

Tags

NGSS.MS-PS4-1

DIRECTIONS: Launch the "Intro" portion of the sim and locate the controls in the top-right corner. Check the box next to "Listener Audio," locate the frequency slider, and slide it back and forth.

QUESTION: Based on your observations, what property of sound is frequency responsible for?

• volume

• amplitude

• pitch

• genre

DIRECTIONS: NEXT, locate the amplitude slider, and slide it back and forth.

QUESTION: Based on your observations, what property of sound is amplitude responsible for?

• volume

• frequency

• pitch

• genre

Tags

NGSS.MS-PS4-1

DIRECTIONS: Click, hold, and drag the girl in the sim to various positions and observe how it affects the sound.

QUESTION: What happens to the audio as you move the girl to different locations?

• volume changes

• pitch changes

• nothing changes

• genre changes

Tags

NGSS.MS-PS4-1

QUESTION: Based on what you can see in the sim, how does the speaker change frequency?

• random changes

• by changing how hard it beats

• by changing how fast it beats

• it doesn't

Tags

NGSS.MS-PS4-1

QUESTION: How does the speaker change amplitude?

• random changes

• by changing how hard it beats

• by changing how fast it beats

• it doesn't

Tags

NGSS.MS-PS4-1

QUESTION: Which property is directly related to the distance between waves (wavelength)?

• amplitude

• frequency

• volume

• genre

Tags

NGSS.HS-PS4-1

QUESTION: Which property determines how intense (bold) the waves are?

• frequency

• pitch

• amplitude

• genre

Tags

NGSS.MS-PS4-1

WRITE: What property of sound changes depending on your position relative to the source of the sound? Based on what you can observe in the sim, why does this happen?

Tags

NGSS.MS-PS4-2

DIRECTIONS: Launch the "Two Sources" portion of the sim and observe what is happening.

WRITE: Identify and describe any patterns or other observations you may notice.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2