Question

the student observes that the shorter straws produce sounds with a higher pitch. which set of information identifies and explains the characteristic of sound that the student observes?
characteristic: frequency
explanation: sounds with higher pitches have greater frequencies.
characteristic: amplitude
explanation: sounds with lower pitches have greater amplitudes.
characteristic: amplitude
explanation: sounds with higher pitches have greater amplitudes.
characteristic: frequency
explanation: sounds with lower pitches have greater frequencies.

Explanation:

Sounds with higher pitches have greater frequencies.

Pitch of sound is related to frequency. Higher - pitched sounds have higher frequencies. Shorter straws vibrate faster, producing higher - frequency (higher - pitched) sounds. Amplitude is related to loudness, not pitch, so options with amplitude are incorrect. The option with frequency and the correct explanation about higher pitches having greater frequencies matches the observation of shorter straws producing higher - pitched sounds.

Answer:

Characteristic: frequency