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1. A wave is a disturbance that carries through matter or empty space.A. matterB. particlesC. energyD. a mediumE. water
2. Electromagnetic waves .A. are transverse wavesB. require a mediumC. are mechanical wavesD. are longitudinal wavesE. are tortional
3. Waves that require or travel through a medium are called .A. longitudinal wavesB. transverse wavesC. mechanical wavesD. tortional wavesE. all of the above
4. For which type of waves do particles in the medium vibrate perpendicular to the direction in which the wave is traveling?A. transverse wavesB. longitudinal wavesC. P wavesD. all of the aboveE. None of the above
ReviewReviewMechanical wavesElectromagnetic wavesTransverse wavesLongitudinal wavesCharacteristics of waves
SoundSound Is a longitudinal waveNeeds a medium to travel through
The source of a sound wave vibrates rapidly
SoundSound This causes
pressure vibrations
Which causes air molecules to vibrate
SoundSoundAir molecules bunch together in some places
CompressionsSpread out at other places
Rarefactions
PitchPitch
How high or how low a sound is
Not how loud Depends on the frequency Faster the frequency, the higher the pitch
PitchPitch Low pitch High pitch
Same amplitude, different
frequency
LoudnessLoudness Depends on the amplitude
Higher amplitude, louder sound
LoudnessLoudness
Quiet
Loud
Same frequency, different
amplitude
EchoEcho Sound waves that bounce off a surface
Sound will reflect off hard surfaces
They will be absorbed by soft surfaces
ResonanceResonance
When two objects naturally vibrate at the same frequency