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# Waves Chapter 15

### 'What Are Waves' 'Properties of Waves' 'Interactions of Waves' 'Seismic Waves'

Wave Disturbance that transfers energy from place to place
Energy The ability to do work
Medium Material through which a wave travels
Mechanical Wave Need a medium through which to travel
Vibration Repeated back and forth, or up and down motion
Transverse Wave Move the medium at right angles to the direction in which the wave travels
Crest High point of a transverse wave
Trough Low part of a transverse wave
Longitude Wave move the medium parallel to the direction in which the waves travel
Compression Parts where the coils are close together
Rarefaction Parts where the coils are spread out
Amplitude the maximum distance that the particles of the medium carrying the wave move away from their rest position
Wavelength The distance between two corresponding parts pf a wave
Frequency The number of complete waves that pass a certain point in a certain amount of time
Hertz (Hz) Units frequency is measured in
Reflection Interaction with a surface
Law of Reflection States that the angle of incidence equals the angle of reflection
Refraction Bending of waves due to a change in speed
Diffraction When a wave moves around a barrier or through an opening in a barrier, it bends and spreads out
Interference The interactions that between waves that meet
Constructive Interference The interference that occurs when waves combine to make a wave with a larger amplitude
Destructive Interference The interference that occurs when two waves combine to make a wave with smaller amplitude
Standing Wave A wave that appears to stand in one place, even though it's really two waves interfering as they pass each other
Node
Anti-node
Resonance
Seismic Wave
P Wave
S Wave
Surface Wave
Tsunami
Seismograph
Created by: cb1116STALOYSIUS