Intro to Waves

Waves produced by different sources are shown in the data table. Which of the following statement best describes the relationship among the waves?

• All waves are the same frequency.

• All waves have equal lengths.

• All waves transfer energy.

• All waves travel at the same speed.

Tags

NGSS.MS-PS4-1

Sofia is looking at herself in the mirror. Which of the following best describes why she can see herself in the mirror?

• She can see herself because visible light waves are reflected to her eyes.

• She can see herself because visible light waves are refracted by the mirror.

• She can see herself because visible light waves are scattered to her eyes.

• She can see herself because visible light is absorbed by the mirror.

Tags

NGSS.MS-PS4-2

Which of the following comparisons is a similarity between sound waves and light waves?

• Sound waves and light waves can be identified by their crests and troughs.

• Sound waves travel at the same speed as light waves.

• Sound waves and light waves can travel through space.

• Sound waves and light waves are measured in wavelengths.

The picture shows two tuning forks labeled 1 and 2. When a tuning fork vibrates it produces a sound. Which of the following describes the relationship between pitch and rate of vibration?

• Tuning fork 1 would have a higher pitch than tuning fork 2 because it would vibrate faster.

• Tuning fork 1 would have a lower pitch than tuning fork 2 because it would vibrate faster.

• Tuning fork 2 would have a higher pitch than tuning fork 1 because it would vibrate faster.

• Tuning fork 2 would have a lower pitch than tuning fork 1 because it would vibrate faster.

On the 4^th of July, there was a fireworks display near the Yadkin River. A spectator saw lights from the fireworks, and then heard loud noises a few seconds later from the same fireworks. Why were the sounds heard after the lights were seen?

• The sound of the fireworks originated a few seconds after the lights of the fireworks.

• The sound of the fireworks traveled farther than the lights of the fireworks.

• The sound of the fireworks traveled more slowly than the lights of the fireworks.

• The sound of the fireworks originated a few seconds before the lights of the fireworks.

What will most likely occur when a light wave enters a new medium and is refracted?

• The light wave will change color when the wave enters a new medium.

• The light wave will change speed when the wave enters a new medium.

• The light wave will change frequency when the wave enters a new medium.

• The light wave will change amplitude when the wave enters a new medium.

Tags

NGSS.MS-PS4-2

An oscilloscope is an instrument that can be used to show wave characteristics of sound. Students used an oscilloscope to display the sound produced when the band’s singer sang a note. The display of the oscilloscope is shown. Which image most closely resembles a note sung with a higher pitch than the one above?

• 
• 
• 
• 

Tags

NGSS.MS-PS4-1

Which of the following best explains why grass on a distant hillside appears green?

• Grass reflects all colors except green.

• Grass absorbs only green light from the sun.

• Grass reflects green light more than any other color.

• Grass transmits green light just as green-colored cellophane transmits green light.

Tags

NGSS.MS-PS4-2

Which of the following best describes why humans can only see visible light but no other regions of the electromagnetic spectrum?

• Human eyes can only detect a narrow range of amplitude.

• Human eyes can only detect a narrow range of wavelengths.

• Human eyes can only detect a narrow range of temperature.

• Human eyes can only detect a narrow range of intensity.

Which of the following best explains why the lower part of the child appears so much different in size from the upper part of the child?

• The light waves that travel through water and then into air are refracted.

• The light waves that travel through water and then into air are enlarged.

• The light rays that travel through air and then into water are reflected.

• The light rays that travel through air and then into water are absorbed.

Tags

NGSS.MS-PS4-2