Unit 8.2 Quiz 5

The two waves below are traveling at the same speed. Which statement best describes the difference between the waves? 

• Wave A has a lower amplitude than Wave B.

• Wave A has a higher amplitude than Wave B.

• Wave A has a lower frequency than Wave B.

• Wave A has a higher frequency than Wave B.

Answer explanation

Wave A has a lower frequency than Wave B because, at the same speed, a lower frequency corresponds to a longer wavelength. This means Wave A oscillates fewer times per second compared to Wave B.

Tags

NGSS.MS-PS4-1

The image shows a homemade musical instrument. Each string will produce a different sound when plucked. Which statement below identifies the string that will most likely produce the sound with the highest pitch?

• String 1, because it is the shortest.

• String 2, because it is the thickest.

• String 3, because it is centered over the hole.

• String 4, because it is the longest.

Answer explanation

String 1 is the shortest, which typically produces the highest pitch when plucked. Shorter strings vibrate faster than longer ones, resulting in higher frequency sounds.

The picture shows four different bells made of the same material. Which of the bells should have the lowest pitch?

• Bell 1

• Bell 2

• Bell 3

• Bell 4

Answer explanation

Bell 4 should have the lowest pitch because it is the largest in size. Larger bells produce lower frequencies, resulting in a deeper sound compared to smaller bells, which produce higher pitches.

Tags

NGSS.MS-PS4-2

Consider the wave shown. What is distance Z a measure of?

• amplitude

• frequency

• wave speed

• wavelength

Answer explanation

Distance Z represents the amplitude of the wave, which is the maximum displacement from the rest position. It measures how far the wave oscillates from its equilibrium position.

Tags

NGSS.MS-PS4-1

The picture shows wave traces of sound waves on computer screens. Traces A and B represent two different sounds at the same scale. Which statement best describes the relationship of sound B to sound A?

• Sound B has a higher velocity.

• Sound B has a longer wavelength.

• Sound B has a higher frequency.

• Sound B has a higher amplitude.

Answer explanation

Sound B has a higher frequency because its wave traces show more cycles per unit time compared to sound A. Higher frequency corresponds to a shorter wavelength, which is evident in the visual representation.

Tags

NGSS.MS-PS4-1

In the wave shown, between which two points should the amplitude be measured?

• points X and Z

• points V and X

• points W and Y

• points U and Z

Answer explanation

The amplitude of a wave is measured from the midpoint to the peak. Points V and X represent the lowest and highest points of the wave, making them the correct choice for measuring amplitude.

Tags

NGSS.MS-PS4-1

The diagram shows a wave with four numbered parts. Which part represents wavelength?

• 1

• 2

• 3

• 4

Answer explanation

The wavelength is defined as the distance between two consecutive points in phase on a wave. In the diagram, part 4 represents this distance, making it the correct choice for wavelength.

Tags

NGSS.MS-PS4-1

Ariel wants to buy the wind chime that will make a sound with the lowest pitch. Which wind chime should she buy?

• A

• B

• C

• D

Answer explanation

Wind chimes produce different pitches based on their size and material. Choice D is the largest or made from the lowest-pitched material, making it the best option for Ariel to achieve the lowest sound pitch.