What’s the deal with WAVE classification?
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What’s the deal with WAVE classification?
Mr. Blizzard, 8th Grade Science
Tanglewood Middle School
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How are WAVES classified?
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Waves can be classified by WHAT
they move through or by HOW energy
moves through them.
What’s the deal with WAVE classification?
red words= vocabulary, blue words= connect words
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Classification of WAVES by WHAT
they move through
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There are two classifications for
waves based on what they move through: Mechanical Waves
Electromagnetic Waves
What’s the deal with WAVE classification?
red words= vocabulary, blue words= connect words
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What are mechanical WAVES?
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Mechanical waves are waves that can ONLY move through a medium (through
matter).
What’s the deal with WAVE classification?
red words= vocabulary, blue words= connect words
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Mechanical waves require the particles of the medium to vibrate in order for energy to
be transferred.
What’s the deal with WAVE classification?
red words= vocabulary, blue words= connect words
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What are examples mechanical WAVES?
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water wavesearthquake/seismic
wavessound waves
waves that travel down a rope or spring
What’s the deal with WAVE classification?
All of these examples CANNOT move through empty space.
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What is EMPTY SPACE?
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Empty space is space in which NO
MATTER is present. Another name for this is a vacuum.
What’s the deal with WAVE classification?
red words= vocabulary, blue words= connect words
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What are electromagnetic
WAVES?
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Electromagnetic waves are waves that can travel
through matter or empty space where
matter is not present.
What’s the deal with WAVE classification?
red words= vocabulary, blue words= connect words
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What are examples of electromagnetic WAVES?
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radio wavesmicrowaves
infrared wavesvisible light
ultraviolet raysX-rays
What’s the deal with WAVE classification?
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Classification of WAVES by HOW energy moves through
them
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There are two classifications for waves
based on how energy moves through them:
Compressional/Longitudinal WavesTransverse Waves
What’s the deal with WAVE classification?
red words= vocabulary, blue words= connect words
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What are compressional/ longitudinal WAVES?
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Mechanical waves in which the particles of matter in the medium vibrate by pushing together and
moving apart parallel to the direction in which the
wave travels are called compressional/longitudinal
waves.
What’s the deal with WAVE classification?
red words= vocabulary, blue words= connect words
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http://www.lcse.umn.edu/specs/labs/glossary_items/rarefaction_spring.html
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The place on the wave that is pushed
together is called the compression and the place that is moving
apart is the rarefaction.
What’s the deal with WAVE classification?
red words= vocabulary, blue words= connect words
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What are examples of compressional/ longitudinal waves?
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sound wavessome waves in a spring
some seismic waves (earthquake waves- primary waves, to be
exact)
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What are transverse WAVES?
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Mechanical waves in which the particles of matter in the medium vibrate by
moving back and forth and perpendicular (at right angles) to the direction
the wave travels are called transverse waves.
What’s the deal with WAVE classification?
red words= vocabulary, blue words= connect words
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science.hq.nasa.gov/kids/imagers/ems/waves3.html
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The highest point of a transverse wave is the crest and the
lowest point is called a trough.
What’s the deal with WAVE classification?
red words= vocabulary, blue words= connect words
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What are examples of transverse waves?
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strings on a musical instrument
waves on a ropesome waves in a spring
some seismic waves (earthquake waves-
secondary waves, to be exact)
What’s the deal with WAVE classification?
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Electromagnetic waves are transverse waves that can travel
without a medium through empty space.
What’s the deal with WAVE classification?
red words= vocabulary, blue words= connect words
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Information from the South Carolina State Science Standards for 8th Grade
Microsoft Clipart (the background picture)
http://www.lcse.umn.edu/specs/labs/glossary_items/rarefaction_spring.html
science.hq.nasa.gov/kids/imagers/ems/waves3.html
Works Cited