What’s the What’s the deal with deal with

WAVE WAVE classification?classification?

How are How are WAVES WAVES classifieclassifie

d?d?

What’s the deal with WAVE What’s the deal with WAVE classification?classification?

WavesWaves can be can be classifiedclassified by by WHATWHAT

they they movemove throughthrough or or by by HOWHOW energyenergy

movesmoves throughthrough them. them.

red wordsred words= vocabulary, = vocabulary, blue wordsblue words= connect = connect wordswords

ClassificatiClassification of on of

WAVES WAVES by by WHATWHAT they they

move move

throughthrough

What’s the deal with WAVE What’s the deal with WAVE classification?classification?

There are twoThere are two classifications classifications for for waveswaves

based on what they based on what they move move throughthrough: :

• Mechanical WavesMechanical Waves•Electromagnetic WavesElectromagnetic Waves

red wordsred words= vocabulary, = vocabulary, blue wordsblue words= connect words= connect words

What are What are mechanicmechanic

al al WAVESWAVES??

What’s the deal with WAVE What’s the deal with WAVE classification?classification?

Mechanical wavesMechanical waves are are waveswaves that can that can

ONLYONLY move move throughthrough a a mediummedium (through (through mattermatter).).

red wordsred words= vocabulary, = vocabulary, blue wordsblue words= connect = connect wordswords

What’s the deal with WAVE What’s the deal with WAVE classification?classification?

Mechanical wavesMechanical waves requirerequire the the particlesparticles of of the the mediummedium to to vibratevibrate in order for in order for energyenergy to to

be be transferredtransferred..

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What are What are examples examples

mechanical mechanical WAVESWAVES??

What’s the deal with WAVE What’s the deal with WAVE classification?classification?

• water waveswater waves•earthquake/seismic wavesearthquake/seismic waves

• sound wavessound waves•waves that travel down a waves that travel down a

rope or springrope or spring

All of these All of these examplesexamples CANNOTCANNOT move through move through empty spaceempty space..

What isWhat is EMPTY EMPTY SPACESPACE??

What’s the deal with WAVE What’s the deal with WAVE classification?classification?

Empty spaceEmpty space is is space in which space in which NO NO

MATTERMATTER is present. is present. Another name for Another name for this is this is a vacuuma vacuum..

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What areWhat are electromagnelectromagn

etic etic

WAVESWAVES??

What’s the deal with WAVE What’s the deal with WAVE classification?classification?

Electromagnetic wavesElectromagnetic waves are are waveswaves that can that can

travel through travel through mattermatter or or empty spaceempty space where where mattermatter is is not presentnot present..

red wordsred words= vocabulary, = vocabulary, blue wordsblue words= connect = connect wordswords

What are What are examples of examples of

electromagneelectromagnetic WAVEStic WAVES??

What’s the deal with WAVE What’s the deal with WAVE classification?classification?

• radio wavesradio waves• microwavesmicrowaves

• infrared wavesinfrared waves• visible lightvisible light

• ultraviolet raysultraviolet rays• X-raysX-rays

ClassificatioClassification of n of WAVES WAVES

by by HOWHOW energy energy moves moves

through through

themthem

What’s the deal with WAVE What’s the deal with WAVE classification?classification?

There are twoThere are two classifications classifications for for waveswaves based on how based on how

energy energy moves through moves through them: them: •Compressional/Longitudinal Compressional/Longitudinal

WavesWaves• Transverse WavesTransverse Waves

red wordsred words= vocabulary, = vocabulary, blue wordsblue words= connect words= connect words

What are What are compressionacompressional/ longitudinal l/ longitudinal

WAVESWAVES??

What’s the deal with WAVE What’s the deal with WAVE classification?classification?

Mechanical wavesMechanical waves in which the in which the particlesparticles of of mattermatter in the in the

mediummedium vibratevibrate by by pushing pushing togethertogether and and moving apartmoving apart

parallelparallel to the to the directiondirection in which in which the wave travelsthe wave travels are called are called compressional/longitudinal compressional/longitudinal

waveswaves..

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http://www.lcse.umn.edu/specs/labs/glossary_items/rarefaction_spring.htmlhttp://www.lcse.umn.edu/specs/labs/glossary_items/rarefaction_spring.html

What’s the deal with WAVE What’s the deal with WAVE classification?classification?

The place on the The place on the wavewave that is that is pushed togetherpushed together

is called the is called the compression compression and the and the place that is place that is moving moving

apartapart is the is the rarefactionrarefaction..

red wordsred words= vocabulary, = vocabulary, blue wordsblue words= connect words= connect words

What are What are examples of examples of

compressionalcompressional/ longitudinal / longitudinal

waveswaves??

What’s the deal with WAVE What’s the deal with WAVE classification?classification?

• sound wavessound waves•some waves in a springsome waves in a spring

•some seismic waves some seismic waves (earthquake waves- (earthquake waves- primary waves, to be primary waves, to be

exact)exact)

What are What are transverstransvers

e e WAVESWAVES??

What’s the deal with WAVE What’s the deal with WAVE classification?classification?

Mechanical wavesMechanical waves in which the in which the particlesparticles of of mattermatter in the in the

mediummedium vibratevibrate by moving by moving back and forthback and forth and and

perpendicularperpendicular ( (at right anglesat right angles) ) to the to the direction the wave direction the wave

travelstravels are called are called transverse transverse waveswaves..

red wordsred words= vocabulary, = vocabulary, blue wordsblue words= connect words= connect words

science.hq.nasa.gov/kids/imagers/ems/waves3.html science.hq.nasa.gov/kids/imagers/ems/waves3.html

What’s the deal with WAVE What’s the deal with WAVE classification?classification?

The The highest pointhighest point of of a a transverse wavetransverse wave is the is the crestcrest and the and the

lowest pointlowest point is is called a called a troughtrough..

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What are What are examples of examples of transverse transverse

waveswaves??

What’s the deal with WAVE What’s the deal with WAVE classification?classification?

• strings on a musical strings on a musical instrumentinstrument

• waves on a ropewaves on a rope• some waves in a springsome waves in a spring

• some seismic waves some seismic waves (earthquake waves- (earthquake waves-

secondary waves, to be exact)secondary waves, to be exact)

What’s the deal with WAVE What’s the deal with WAVE classification?classification?

Electromagnetic wavesElectromagnetic waves are are transverse wavestransverse waves

that can travel that can travel without a without a mediummedium

through through empty spaceempty space..

red wordsred words= vocabulary, = vocabulary, blue wordsblue words= connect words= connect words

Works CitedWorks Cited• Information from the South Carolina Information from the South Carolina

State Science Standards for 8State Science Standards for 8thth Grade Grade• Microsoft Clipart (the background Microsoft Clipart (the background

picture) picture) • http://www.lcse.umn.edu/specs/http://www.lcse.umn.edu/specs/

labs/glossary_items/labs/glossary_items/rarefaction_spring.htmlrarefaction_spring.html

• science.hq.nasa.gov/kids/imagers/science.hq.nasa.gov/kids/imagers/ems/waves3.htmlems/waves3.html