NGSS.4-PS4-1

What is vibration?

• how loud a sound is
• the back and forth movement of matter
• how high or low a sound is
• the loudness or softness of a sound

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Sound is caused by? 

• force
• vibrations
• instruments

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Research ships use sound waves to find objects underwater. What happens to the sound waves when they are emitted from the ship?

• They are absorbed by the water around the ship.

• They are reflected off objects they strike in the water.

• They are absorbed by the air above the ship.

• They are refracted as they strike the water.

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Waves in the ocean are mostly caused by...

• Earthquakes

• Currents

• Tides

• Wind

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Halfway between a crest and a trough

• resting point

• trough

• wavelength

• sound

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What is a damaging fast-moving wave often caused by underwater earthquake?

• tsunami

• volcano

• hurricane

• all the above

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An object that does not vibrate cannot produce

• light

• heat

• electricity

• sound

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The highest point of a wave is called what?

• Trough

• energy

• Peak

• amplitude

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Which line demonstrates how light travels?

• A

• B

• C

• D

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Lightwaves are characterized by their __________

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