9c reflection, refraction, interference and diffraction

15. A wave interaction in which a wave bounces off a surface that it does not go through is called

• absorption.
• reflection.
• transmission.
• diffraction.

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NGSS.MS-PS4-2

What is a medium?

• something between a small and a large?
• the substance through which a wave can travel
• a pattern of vibration that simulates when a wave is standing still
• the distance from any point on a wave to an identical point on the next wave

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NGSS.MS-PS4-2

Sound travels FASTEST through which of these materials?

• Air
• Empty space
• Metal
• Water

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NGSS.MS-PS4-2

Sound will travel slowest through which of the following forms of matter?

• milk
• desk
• air
• door

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NGSS.MS-PS4-2

Which explains why the fork looks different under water?

• light can't pass through the glass
• the wavelength of light lengthens
• the amount of light increases when going through water
• light is refracted at an angle

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NGSS.HS-PS4-5

NGSS.HS-PS4-1

which material does sound travel the fastest?

• solid 
• liquid 
• gases

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NGSS.MS-PS4-2

When light passes from one transparent medium to another, it changes speed. When light changes speed, it changes direction. This change of direction, or bending, is called refraction.
 True or false

• True
• False

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NGSS.MS-PS4-2

T or F
Light can travel through a vacuum, or empty space.

• False
• True

What does opaque mean?

• You cannot see through it, the light is absorbed.
• You can see through it, light is transmitted.
• You can see through it a little, the light is transmitted but it is scattered.

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NGSS.MS-PS4-2

T or F
Transparent means that you can only see through it a little because the light is transmitted but scattered.

• True
• False

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NGSS.MS-PS4-2