Question

1. now that we have a model of the harp making sounds, we have a problem with some data from the harp. sam collected motion detector data from different sounds that the harp made but he forgot to label his graphs and does not know which graph goes with which sound he played. sam needs to know which graph shows both a high pitch and a high loudness sound. complete the table below to write an argument for which graph shows the high pitch, high loudness sound.

Explanation:

CLAIM:

Graph D shows the high - pitch, high - loudness sound.

EVIDENCE FROM GRAPH (use amplitude and frequency):

• Amplitude: The amplitude of a wave is related to loudness. A larger amplitude means a louder sound. Graph D has a relatively large amplitude (the vertical distance from the mid - line to the peak/trough is large) compared to the other graphs.
• Frequency: Frequency is related to pitch. A higher frequency (more waves in a given time period) means a higher pitch. Graph D has more waves (a higher frequency) in the same time interval compared to Graph E and Graph B.

HOW DOES THIS EVIDENCE SUPPORT YOUR CLAIM:

• For loudness: Since amplitude is proportional to loudness, the large amplitude of Graph D indicates a high loudness.
• For pitch: Since frequency is proportional to pitch, the high frequency of Graph D indicates a high pitch. So, the combination of high amplitude (high loudness) and high frequency (high pitch) in Graph D supports the claim that it represents the high - pitch, high - loudness sound.

WHY IS IT NOT THE OTHER GRAPHS?

• Graph E: Graph E has a lower frequency (fewer waves in the same time) and a smaller amplitude compared to Graph D. So, it has a lower pitch and lower loudness.
• Graph B: Graph B has a lower frequency (fewer waves in the same time) and a smaller amplitude compared to Graph D. So, it has a lower pitch and lower loudness.

Answer:

CLAIM	EVIDENCE FROM GRAPH (use amplitude and frequency)	HOW DOES THIS EVIDENCE SUPPORT YOUR CLAIM	WHY IS IT NOT THE OTHER GRAPHS?