how does diffraction work

is the bending of light as it passes around the edge of an object

is a beam of light stopping at a wall

A student placed a pencil in a cup of water. The pencil appears broken because light-

bends when it passes through water

always travels in a straight line

makes the water in the glass evaporate

reflects the pencil on the water's surface

When comparing the two waves that are shown, how would Wave A (green wave) differ than Wave B (black wave)?

Wave A and B have the same amplitude, but wave B (black) has a lower pitch.

Wave A and B have the same amplitude, but Wave A has a lower pitch.

Wave A and B have the same pitch, but Wave A is a softer sound.

Wave A and B have the same pitch, but Wave B is a softer sound.

How do electromagnetic and mechanical waves compare?

Mechanical waves can only travel through a solid, liquid, or gas, but electromagnetic waves can travel through a vacuum.

Mechanical waves can only travel through a vacuum, but electromagnetic waves can travel through a solid, liquid, or gas.

Mechanical waves can travel through a solid, liquid, or gas, but electromagnetic waves can only travel through a gas.

Mechanical waves can travel through a solid, liquid, or gas, but electromagnetic waves can only travel through a solid.

A student asks a series of questions about a wave. The answer to which question will allow the student to determine whether the wave is electromagnetic or mechanical?

Does it require a medium in order to travel?

Can it pass through air and water?

Does it have a measurable speed?

Does it have a measurable frequency?

What do radio waves, microwaves, X-rays, and gamma rays all have in common?

They are electromagnetic waves.

They all have the same wavelength.

They are detected in the same way.

They store the same amount of energy.

What happens to the amplitude of a sound wave when energy is increased?

As energy is increased, the amplitude increases causing the sound to get louder.

As energy is increased, the amplitude stops and no sound is made.

As energy is increased, the amplitude decreases causing the sound to get quieter.

As energy is increased, the amplitude remains the same keeping the sound constant.

A student creates a model to demonstrate the Doppler effect. Which statements correctly compare the sound waves experienced by observer A and observer B? Select ALL that apply.

Observer B experiences a wave with a higher pitch.

Observer B experiences a wave with a higher frequency.

Observer B experiences a wave with a shorter wavelength.

Observer B experiences a wave with lower energy.

Observer B experiences a wave with a slower speed.

What would happen to the frequency of a wave if its wavelength was decreased by one-half?

The frequency would be doubled.

The frequency would remain the same.

The frequency would produce a standing wave.

Sam observes the diagram of the electromagnetic spectrum. Which of the following can Sam conclude about wavelength and frequency after evaluating the electromagnetic spectrum?

As the wavelength decreases, the frequency increases.

As the wavelength increases, the frequency increases.

As the wavelength decreases, the frequency decreases.

As the wavelength increases, the frequency remains constant

The particles of solids are packed together tightly, so sound waves travel faster through solids than through liquids or gases. How do light waves differ from sound waves?

Light waves do not require a medium and travel fastest when in a vacuum

Light waves require a medium and travel fastest through liquids.

Light waves require a medium, but travel fastest through a vacuum.

Light waves do not require a medium, but travel fastest through solids.

Which statement most accurately describes the diagram?

White light is refracted because it changes speed as it enters a different medium.

White light is diffracted because it is traveling so fast through the prism.

White light is diffracted because it was in contact with a different medium.

White light is refracted because a prism causes a change in wave properties.

Which of the following correctly compares the two waves?

The dashed (blue) wave has a higher frequency, but a lower amplitude than the solid (red) wave; therefore it will be higher pitched, but not as loud as the solid (red wave).

Both waves have the same frequency and amplitude, so they will be matched in pitch and loudness.

The solid (red) wave has higher frequency than the dashed (blue) wave, so it will be higher pitched, but they will have the same loudness.

The dashed (blue) wave has higher frequncy than the solid (red) wave, but their amplitudes are equal; therefore the dashed (blue) wave will be higher pitched, but they will have the same loudness.

Unit 3 Waves Study Guide

Authored by Charles Martinez

Science

8th - 9th Grade

NGSS covered

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44 questions

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MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which wave has a greater frequency?

wave B

wave C

Tags

NGSS.MS-PS4-1

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which wave has a longer wavelength?

wave C

wave D

Tags

NGSS.MS-PS4-1

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which wave has the most energy?

top wave

bottom wave

Tags

NGSS.MS-PS4-1

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which part of the wave is shown at letter E?

trough

crest

resting point

amplitude

Tags

NGSS.MS-PS4-1

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

High Amplitude =__________________

Louder sounds

Quieter Sounds

Tags

NGSS.MS-PS4-1

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Low Amplitude = ______________

Quieter Sounds

Louder sounds

Tags

NGSS.MS-PS4-1

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Low frequency = _______ Pitch

Low

High

Tags

NGSS.MS-PS4-1

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Unit 3 Waves Study Guide

Which wave has a greater frequency?

Which wave has a longer wavelength?

Which wave has the most energy?

Which part of the wave is shown at letter E?

High Amplitude =__________________

Low Amplitude = ______________

Low frequency = _______ Pitch

High frequency = _______ Pitch

In General Sound waves travel the slowest in __________

In General Sound waves travel the fastest in __________

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