Which statement best describes diffraction?

Light energy is absorbed by surrounding matter.

Light slows down as it passes through a medium.

Which statement best describes what happens to the amplitude of a wave as the energy increases?

The amplitude increases as the energy increases.

The amplitude decreases as the energy increases.

. The amplitude goes to zero as the energy increases.

The amplitude remains the same as the energy increases.

Which characteristics should be added to the middle section of the model to make it complete?

carry energy, can be noticed using senses

travel faster in water than air, travel faster in air than through a solid

travel slower in water than air, travel slower in air than through a solid

can be heard, can be seen, can be felt

of these characteristics are shared by both light and sound waves, so they belong in the middle of the model. What happens to the speed of sound as it travels through a gas and into a solid?

The speed increases and then decreases.

The speed decreases and then increases.

The table shows the speed of light in three states of matter. At what point in time would the speed of light decrease?

when the light travels from air to water

when the light travels from glass to air

when the light travels from glass to water

Which statement best describes how an increase in the density of a material affects the speed of light and sound?

The speed of light decreases but the speed of sound increases.

The speed of both waves decrease.

The speed of both waves increases.

The speed of light increases but the speed of sound decreases.

What happens when light waves travel from air through a denser medium?

They continue to travel in a straight line.

They continue to travel in a zigzag line.

A student performs an experiment where he sends sound waves from the air through a solid, a liquid, and a gas. He records the speed of the wave traveling through each medium but forgets to label each medium. The table shows his observations. The student knows that sound travels through room-temperature air at 343 m/s. Based on the student's results, which medium is the solid, the liquid, and the gas?

X is the gas, Y is the liquid, and Z is the solid.

X is the liquid, Y is the gas, and Z is the solid.

X is the solid, Y is the liquid, and Z is the gas.

X is the gas, Y is the solid, and Z is the liquid.

A student creates a transverse wave using a rope tied to a tree, as shown in the diagram. Her teacher asks her to change the wave to show a greater energy transfer. What can the student do?

She can increase the frequency of the wave.

She can decrease the amplitude of the wave.

She can decrease the frequency of the wave.

She can increase the wavelength of the wave.

Jessie creates a model of two waves that have the same amplitude, as shown. Which description best compares the two waves?

Wave B has greater energy because it has a higher frequency and a shorter wavelength.

Wave A has greater energy because it has a lower frequency and a longer wavelength.

Wave A has less energy because it has a higher frequency and a shorter wavelength.

Wave B has less energy because it has a lower frequency and a longer wavelength.

Emma draws another diagram showing how adding energy affects this wave. How does her new diagram compare to this diagram?

Her diagram shows higher wave amplitudes.

Her diagram shows higher wavelengths.

Her diagram shows lower wave amplitudes.

Her diagram shows lower wave frequencies.

What happens to the frequency of a wave as the wavelength increases?

The frequency remains the same.

Which of the following best describes the relationship between wave speed, frequency, and wavelength?

Wave speed is the product of frequency and wavelength.

Wave speed is the ratio of frequency to wavelength.

Wave speed is the sum of frequency and wavelength.

Wave speed is the difference between frequency and wavelength.

Which of the following best describes the relationship between frequency and pitch in sound waves?

Higher frequency results in a higher pitch.

Higher frequency results in a lower pitch.

Frequency and pitch are inversely related.

Frequency does not affect pitch.

Organize these options into the right categories

Wavelength measured from crest to crest.

Amplitude measured from rest position to crest or trough.

Medium vibrates perpendicular to the direction of motion.

Wavelength measured from beginning of one compression to the beginning of the next compression.

Amplitude depends on the density of compressions.

Medium vibrates parallel to the direction of motion.

Compare mechanical waves to EM waves

oscillating electric and magnetic fields

both transverse and longitudinal waves

ex: visible light,radio waves, x-rays

Ex: sound waves, earthquake waves , water waves

Categorize the characteristics as Light or Sound Waves

travels at a constant speed in a vacuum

visible light is a small part of the electromagnetic spectrum

travel at the speed of light in a vacuum

Science Waves Unit Part A 8th gr 24-25

Authored by Joshua Ryan-Jenkins

Science

8th Grade

NGSS covered

Used 10+ times

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46 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The table shows an electromagnetic wave and a mechanical wave with their characteristics. Which best compares the difference between electromagnetic and mechanical waves?

Electromagnetic waves are longitudinal, while mechanical waves are transverse.

Electromagnetic waves can travel through a vacuum, while mechanical waves cannot.

Mechanical waves can travel at the speed of light, while electromagnetic waves cannot.

Mechanical waves consist of electric and magnetic fields, while electromagnetic waves do not.

Answer explanation

Electromagnetic waves can travel in space without any medium, while mechanical waves need a medium to transport from one place to another.

Use the drop-down menu to complete the description of a wave.
A wave is transporting energy from left to right. The particles of the medium are moving back and forth in a leftward and rightward direction. This type of wave is known as (a)

Longitudinal

Transverse

Surface

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which question will help the student determine if the wave is electromagnetic or magnetic?

Can it pass through air and water?

Does it have a measurable speed?

Does it require a medium to travel?

Does it have a measurable frequency?

Answer explanation

An electromagnetic wave requires a medium to travel, so this would allow the student to determine an electromagnetic wave.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Which TWO properties are not present in mechanical waves?

amplitude

wavelength

electric field

compression

magnetic field

Answer explanation

Mechanical waves do not have electric fields.
Mechanical waves do not have magnetic fields.

Which is NOT a mechanical wave?

sound wave

ocean waves

seismic waves

electromagnetic wave

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A wave travels through the air. The particles of the wave move at right angles to the motion of the energy of the wave. What type of wave is this?

light

sound

longitudinal

transverse

Answer explanation

In a transverse wave, the particles of the wave move at right angles to the motion of the energy of the wave.

DROPDOWN QUESTION

1 min • 1 pt

Use the drop-down menus to complete the sentences describing crests and troughs. (a) are the highest point of a wave, while (b) are the lowest point of a wave. Crests and troughs are parts of a (c)

Crest

trough

Transverse Wave

Longitudinal

Surface

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Science Waves Unit Part A 8th gr 24-25

The table shows an electromagnetic wave and a mechanical wave with their characteristics. Which best compares the difference between electromagnetic and mechanical waves?

Electromagnetic waves can travel in space without any medium, while mechanical waves need a medium to transport from one place to another.

Use the drop-down menu to complete the description of a wave.
A wave is transporting energy from left to right. The particles of the medium are moving back and forth in a leftward and rightward direction. This type of wave is known as (a)

Which question will help the student determine if the wave is electromagnetic or magnetic?

An electromagnetic wave requires a medium to travel, so this would allow the student to determine an electromagnetic wave.

Which TWO properties are not present in mechanical waves?

Mechanical waves do not have electric fields.
Mechanical waves do not have magnetic fields.

Which is NOT a mechanical wave?

A wave travels through the air. The particles of the wave move at right angles to the motion of the energy of the wave. What type of wave is this?

In a transverse wave, the particles of the wave move at right angles to the motion of the energy of the wave.

Use the drop-down menus to complete the sentences describing crests and troughs. (a) are the highest point of a wave, while (b) are the lowest point of a wave. Crests and troughs are parts of a (c)

Which of the following properties describes the bending of light as it enters a medium?

Which statement best describes diffraction?

A student is bouncing a ball off the wall in gym class to model for a fellow student how sound waves interact with surfaces. At first, the student bounces the ball off a concrete wall in the gym, shown in Model 1. Identify whether the model best represents reflection, absorption, or transmission.

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Science Waves Unit Part A 8th gr 24-25

The table shows an electromagnetic wave and a mechanical wave with their characteristics. Which best compares the difference between electromagnetic and mechanical waves?

Electromagnetic waves can travel in space without any medium, while mechanical waves need a medium to transport from one place to another.

Use the drop-down menu to complete the description of a wave. A wave is transporting energy from left to right. The particles of the medium are moving back and forth in a leftward and rightward direction. This type of wave is known as​ (a)

Which question will help the student determine if the wave is electromagnetic or magnetic?

An electromagnetic wave requires a medium to travel, so this would allow the student to determine an electromagnetic wave.

Which TWO properties are not present in mechanical waves?

Mechanical waves do not have electric fields.Mechanical waves do not have magnetic fields.

Which is NOT a mechanical wave?

A wave travels through the air. The particles of the wave move at right angles to the motion of the energy of the wave. What type of wave is this?

In a transverse wave, the particles of the wave move at right angles to the motion of the energy of the wave.

Use the drop-down menus to complete the sentences describing crests and troughs. (a) are the highest point of a wave, while ​ (b) are the lowest point of a wave. Crests and troughs are parts of a ​ (c)

Which of the following properties describes the bending of light as it enters a medium?

Which statement best describes diffraction?

A student is bouncing a ball off the wall in gym class to model for a fellow student how sound waves interact with surfaces. At first, the student bounces the ball off a concrete wall in the gym, shown in Model 1. Identify whether the model best represents reflection, absorption, or transmission.

Access all questions and much more by creating a free account

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Use the drop-down menu to complete the description of a wave.
A wave is transporting energy from left to right. The particles of the medium are moving back and forth in a leftward and rightward direction. This type of wave is known as (a)

Mechanical waves do not have electric fields.
Mechanical waves do not have magnetic fields.

Use the drop-down menus to complete the sentences describing crests and troughs. (a) are the highest point of a wave, while (b) are the lowest point of a wave. Crests and troughs are parts of a (c)