Open Sci Ed 8.2 Lesson 6 Assessment

Front

Which part of this instrument is the sound source?

Back

The strings

Answer explanation

The strings are the sound source in this instrument. When plucked or bowed, they vibrate to produce sound, while the wood and base serve to amplify and resonate that sound.

Front

What would you expect the sound source to do on this instrument?

Back

vibrate

Answer explanation

The sound source on this instrument would cause it to vibrate, producing sound. Unlike wiggling or moving up and down, vibration is the primary mechanism for sound generation in musical instruments.

Front

If a musician wanted to use less force on this instrument, what would it produce?

Back

a softer sound

Answer explanation

Using less force on the instrument results in a softer sound. The intensity of the sound produced is directly related to the force applied; less force means a quieter output.

Front

If a musician wanted to play a louder sound on this instrument, what would they need to do?

Back

strike it with more force

Answer explanation

To produce a louder sound on the instrument, the musician needs to strike it with more force. This increases the energy transferred to the instrument, resulting in a louder sound.

Front

If the musician wanted to change the frequency of an instrument they would...

Back

play a different pitch

Answer explanation

To change the frequency of an instrument, the musician must play a different pitch. Frequency is directly related to pitch; altering the pitch changes the frequency produced by the instrument.

Front

Graph _________ has the highest frequency

Back

D

Answer explanation

Graph D has the highest frequency as indicated by the data presented. It clearly shows a greater number of occurrences compared to graphs B and E, making D the correct choice.

Front

Graph _________ has the highest amplitude

Back

B

Answer explanation

Graph B has the highest amplitude, which is determined by the distance from the center line to the peak of the wave. Comparing the graphs, B clearly shows the largest vertical distance, indicating its higher amplitude.

Front

Graph_________has the lowest frequency

Back

E

Answer explanation

Graph E has the lowest frequency compared to the other options. By analyzing the frequency values represented in the graphs, it is clear that E stands out with the least amount.

Front

Which graph has the high pitch and high loudness?

Back

D

Answer explanation

Graph D shows both high pitch and high loudness, as indicated by its position in the frequency and amplitude spectrum. This makes it the correct choice compared to the other options.

Front

Sounds that have a high pitch ________ faster.

Back

vibrate

Answer explanation

Sounds with a high pitch vibrate faster due to their shorter wavelengths. Higher frequency vibrations result in higher pitch sounds, making the correct choice 'vibrate'.