Ngss waves: 4th grade
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Longitudinal Waves
Transverse Waves
Electromagnetic Radiation (Light) Waves
Sound Waves
Technologies for Information Transfer
Analog
:
Information represented by a continuous wave.
Examples
: sound waves, light waves, any kind of waves
Analog technology
:
A wave is recorded and used in its original form.
Examples
: analog clock, vinyl record
Digital:
Information represented by separate and distinct (discrete) values.
Examples:
fingers and toes, numbers, letters
Digital technology
:
A wave is sampled at an interval, turned into discrete values and stored.
Examples
: CDs, DVDs, MP3, cassette tapes