Waves (8th grade study guide)

If all waves were measured for a period of 5 seconds, which wave had the highest frequency?

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Tags

NGSS.MS-PS4-1

A student stands in a school hallway. A wall separates a classroom from the student. The student in the hallway cannot see inside the classroom but hears noises from with the classroom. Which of these best explains why the student hears the noises but cannot see in the classroom?

• Sound waves are absorbed by the wall, and visible light waves are transmitted through the wall

• Sound waves are transmitted through the wall and visible light waves are reflected by the wall

• Sound waves are reflected by the wall, and visible light waves are refracted by the wall

• Sound waves are reflected by the wall and visible light waves are absorbed by the wall

Tags

NGSS.MS-PS4-2

A student has a remote control for a television. The student points the remote at the television and presses a button on the remote labeled "volume". A small red light flashes on the front off the remote. The student observes that the sound from the television becomes lower. Which statement BEST describes how the remote control communicates with the television to change the volume of the sound?

• The remote control sends microwaves toward the television that are absorbed by the front of the television

• The remote control sends low-energy infrared radiation to a light detector on the front of the television

• The remote control sends radio waves in many directions, which bounce off the walls of the room toward the front of the television

• The control send sound waves in many directions, which bounce of the walls of the room toward the vibration detector on the front of the television

Tags

NGSS.MS-PS4-2

Which measurement in the diagram shows amplitude and why?

• measurement A, amplitude can be measured from the bottom of the trough to the top of the crest

• measurement B, amplitude can be measured from crest to trough

• measurement C, amplitude can be measured from trough to equilibrium

• measurement D, amplitude can be measured from crest to crest

Tags

NGSS.MS-PS4-1

Which of the following properties make a light wave different from all mechanical waves?

• A light wave slows down in a vacuum

• A light wave is able to transmit energy

• A light wave is exists as a transverse wave

• A light wave can travel without a medium

The wave does not move or reflect off the medium and the energy is passed to the medium.

• Absorption

• Transmission

• Reflection

• Refraction

Tags

NGSS.MS-PS4-2

The wave bounces off the surface.

• Reflection

• Transmission

• Refraction

• Absorption

Tags

NGSS.MS-PS4-2

The wave bends because the speed of the wave changes.

• Reflection

• Refraction

• Absorption

• Transmission

Tags

NGSS.MS-PS4-2

The wave passes through a medium with little change to the wave.

• Reflection

• Refraction

• Transmission

• Absorption

Tags

NGSS.MS-PS4-2

• Reflection

• Refraction

• Transmission

• Absorption

Tags

NGSS.MS-PS4-2