waves. whats the deal with wave classification?
DESCRIPTION
How are WAVES classified?TRANSCRIPT
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WAVES
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What’s the What’s the deal with deal with
WAVE WAVE classification?classification?
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How are How are WAVES WAVES classifieclassifie
d?d?
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Waves can be Waves can be classified by WHAT classified by WHAT
they move through or they move through or by HOW energy by HOW energy
moves through them.moves through them.
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ClassificatiClassification of on of
WAVES WAVES by by WHATWHAT they they
move move throughthrough
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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
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What are What are mechanicmechanic
al al WAVESWAVES??
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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
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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??
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• 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 examples All of these examples CANNOTCANNOT move through empty space.move through empty space.
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What isWhat is EMPTY EMPTY SPACESPACE??
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Empty spaceEmpty space is space is space in which in which NO MATTERNO MATTER is present. Another is present. Another
name for this is name for this is a a vacuumvacuum..
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What areWhat are electromagnelectromagn
etic etic WAVESWAVES??
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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..
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What are What are examples of examples of
electromagneelectromagnetic WAVEStic WAVES??
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• radio wavesradio waves• microwavesmicrowaves
• infrared wavesinfrared waves• visible lightvisible light
• ultraviolet raysultraviolet rays• X-raysX-rays
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ClassificatioClassification of n of WAVES WAVES
by by HOWHOW energy energy moves moves
through through themthem
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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
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What are What are compressionacompressional/ longitudinal l/ longitudinal
WAVESWAVES??
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Mechanical wavesMechanical waves in which the in which the particlesparticles of of mattermatter in the in the mediummedium vibratevibrate by by pushing togetherpushing together and and
moving apartmoving apart parallelparallel to the to the directiondirection in which the wave in which the wave
travelstravels are called are called compressional/longitudinal wavescompressional/longitudinal waves..
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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
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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 place that is and the place that is moving apartmoving apart is the is the
rarefactionrarefaction..
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What are What are examples of examples of
compressionalcompressional/ longitudinal / longitudinal
waveswaves??
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• 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)
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What are What are transverstransvers
e e WAVESWAVES??
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Mechanical wavesMechanical waves in which the in which the particlesparticles of of mattermatter in the in the
mediummedium vibratevibrate by moving by moving back back and forthand forth and and perpendicularperpendicular ( (at at
right anglesright angles) to the ) to the direction direction the wave travelsthe wave travels are called are called
transverse wavestransverse waves..
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science.hq.nasa.gov/kids/imagers/ems/waves3.html science.hq.nasa.gov/kids/imagers/ems/waves3.html
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The The highest pointhighest point of of a a transverse wavetransverse wave is is
the 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??
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What’s the deal with WAVE What’s the deal with WAVE classification?classification?•strings on a musical instrumentstrings on a musical instrument
• waves on a ropewaves on a rope• some waves in a springsome waves in a spring
• some seismic waves some seismic waves (earthquake waves- secondary (earthquake waves- secondary
waves, to be exact)waves, to be exact)
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Electromagnetic Electromagnetic waveswaves are are transverse transverse waveswaves that can travel that can travel
without a without a mediummedium through through empty spaceempty space..
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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/labs/http://www.lcse.umn.edu/specs/labs/
glossary_items/glossary_items/rarefaction_spring.htmlrarefaction_spring.html
• science.hq.nasa.gov/kids/imagers/science.hq.nasa.gov/kids/imagers/ems/waves3.htmlems/waves3.html