Unit 5 Lesson 2 Behaviors of Waves

When a wave hits a medium and is not absorbed but bounces off the surface.

• reflection

• refraction

• transmission

• absorption

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A flashlight shines light on a plane mirror as shown in the diagram.

Which path will the reflected light travel?

• W

• X

• Y

• Z

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Echoes are a type of sound wave. How are echoes created?

• absorption

• reflection

• refraction

• transmission

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What is the definition of Refraction?

• The bending of waves as they enter a new medium

• When two interfering waves have a displacement in the opposite direction, crest and trough overlap. Zero amplitude.

• When two interfering waves have a displacement in the same direction, two crests and two troughs overlap. Increased amplitude.

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What type of wave behavior is pictured above?

• Refraction
• Reflection
• Absorption
• Diffraction

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When a sound wave experiences reflection, we hear

• a louder sound
• an echo
• a quieter sound
• nothing

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What is the definition of Diffraction?

• The bending of waves as they enter a new medium

• Bouncing back of waves from a surface that it can’t pass through

• When two interfering waves have a displacement in the opposite direction, crest and trough overlap. Zero amplitude.

• The bending of waves as they pass through openings or around corners

What type of wave behavior is pictured above?

• Refraction
• Reflection
• Absorption
• Diffraction

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NGSS.MS-PS4-2

Match the following

• seeing a rainbow after a rainshower

• Refraction

• light passing through the windows

• Transmission

• seeing your image in a mirror

• Reflection

• the reason the sky is blue

• Diffraction

• hearing sound from the hallway

• Scattering

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Match the following

• Diffraction

• Wave changes direction when moving from one medium to another

• Transmission

• Wave completely passes through a medium.

• Refraction

• Waves combine together to form a larger wave.

• Interference

• Wave encounters a barrier that causes the wave to return.

• Reflection

• Wave stays in the same medium but bends around an obstacle.

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NGSS.MS-PS4-2