Chapter 11 Vocab 9th Grade--Waves and Their Parts
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Transcript of Chapter 11 Vocab 9th Grade--Waves and Their Parts
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VocabChapter 11—Waves
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Amplitude
• The greatest distance that particles in a medium move from their normal position when a wave passes
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Constructive Interference
• Any interference in which waves combine so the resulting wave is bigger than the original wave
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Crest
• The highest point of a transverse wave
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Electromagnetic Waves
• Wave caused by a disturbance in electric and magnetic fields—DOES NOT require a medium (Ex: Light)
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Destructive Interference
• Any interference in which waves combine so the resulting wave is smaller than the largest of the original waves
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Diffraction
• The bending of a wave as it passes an edge/opening
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Doppler Effect
• An observed change in the frequency of a wave when the source or observer is moving
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Frequency
• The number of vibrations that occur in a 1 second time interval
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Interference
• The combination of 2+ waves that exist in the same place at the same time
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Longitudinal Wave
• Wave that causes the particles of the medium to vibrate parallel to the wave’s direction.
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Medium
• The matter through which a wave travels
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Mechanical Wave
• Waves that require a medium
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Period
• The time required for one full wavelength to pass a certain point
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Reflection
• The bouncing back of a wave as it meets a surface/boundary
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Refraction
• The bending of a wave as it passes from one medium to the other.
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Standing Wave
• Wave form caused by interference that appears not to move along the medium that shows some regions of no vibration (nodes) and other regions of maximum vibrations (antinodes)
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Transverse Wave
• Wave that causes the particles of the medium to vibrate perpendicular to the direction the wave travels.
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Trough
• The lowest part of a transverse wave
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Wave
• A disturbance that carries energy through matter and space
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Wavelength
• The distance between ant 2 successive identical parts of a wave.
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Wave Speed
• The speed at which a wave passes through a medium