Understanding Wave Speed and Media Density

Which statement can be made based on these data?

• Sound waves are slowest in liquids and fastest in gases.
• Sound waves are fastest in solids and slowest in gases.
• Speed of a sound wave increases from one medium to another.
• Speed of a sound wave decreases from one medium to another.

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Which is true about the speed of light versus the speed of sound?

• light waves travel slower than sound waves

• both light and sound travel at the same exact speed

• sound waves travel slower than light waves

• there is no way to ever know

Light waves travel fastest in __________.

• a solid

• a gas

• a liquid

• a vacuum

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The speed of any wave depends upon

• its energy

• the medium through which it travels.

•  its angle of reflection.

• its amplitude.

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NGSS.MS-PS4-2

What is the primary learning target discussed in the video?

• To understand the characteristics of waves

• To explore the properties of electromagnetic waves

• To learn about the speed of light

• To analyze and predict the relationship between media density and wave speed

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NGSS.HS-PS4-1

Which medium allows electromagnetic waves to travel the fastest?

• Air

• Glass

• Water

• Vacuum of space

Why do electromagnetic waves slow down in mediums like water and glass?

• Due to the high density of the medium

• Because they need a medium to travel

• Due to the low density of the medium

• Because they do not need a medium to travel

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NGSS.MS-PS4-1

NGSS.MS-PS4-2

In which medium do mechanical waves travel the fastest?

• Vacuum

• Solids

• Liquids

• Gases

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What is the reason mechanical waves travel fastest in solids?

• There is no medium

• Particles are loosely packed

• Particles are far apart

• Particles are tightly packed

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NGSS.MS-PS4-2

Which of the following statements is true about electromagnetic waves?

• They do not need a medium to travel

• They need a medium to travel

• They travel fastest in solids

• They are slowest in the vacuum of space