NGSS.4-PS4-1

How does sound travel?

• Sounds travels in waves
• sound travels slow
• sound travels fast
• sound doesn't travel

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Sound travels fastest through...

• gas
• liquid
• solids/metals
• space

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NGSS.4-PS4-1

What happens when we hear an echo?

• We know there is danger
• there must be someone yelling back to us
• Sound is reflected off a surface and repeated back
• sounds waves are traveling really fast

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NGSS.4-PS4-1

Longitudinal waves are ______.

• Parallel
• Perpendicular
• Crazy

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What is wavelength?

• How high or low a pitch is.
• How loud a sound is.
• The length of a wave.

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___________ is a device that shows sound waves like a graph, in a sideways view.

• oscilloscope
• thermometer
• barometer

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NGSS.4-PS4-1

The pitch of a stringed instrument can be affected by

• the length of the bow being rubbed across strings

• the size of a player's fingers

• the length and thickness of its strings

• how much energy is used when it is plucked

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NGSS.4-PS4-1

How can you make a sound louder?

• move away from the sound
• use more energy to create the sound
• use less energy to make the sound
• use a smaller number of objects to create the sound

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NGSS.4-PS4-1

To bounce off and go in the opposite directions

• reflection

• refraction

• absorption

• transfer

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Is it possible for a tsunami to pass under your boat and you not know it is happening?

• yes

• no

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