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7th grade Vocab for 'Waves'

Vocabulary WordDefinition
Wave A disturbance that moves through matter or space
Transverse Wave Particles in matter move up and down at right angles in the direction the wave travels
Compressional Wave Particles in matter move back and forth along the same direction in which the wave travels
Wavelength Length of a wave; measured from crest to crest
Frequency The number of wavelengths that pass by a point each second
Law of Reflection The angle that the wave hits a reflective surface, it'll bounce back the same
Refraction The change in direction of a wave when it changes speed as it travels from one material to another
Diffraction When waves bend and change direction and instead go around obstacles
Opaque Materials let no light pass through
Translucent Materials absorb some light but also reflect some
Transparent Materials let almost all light through
Reflect When light bounces right off the material
Absorb When light gets taken into the material
Transmit When light goes right through the material
Loudness Volume; the magnitude of sound
Pitch Frequency; when a wave has a low frequency it has a low pitch
Echolocation The location of objects by reflected sound
Echo A sound or series of sounds caused by the reflection of sound waves from a surface back to the listener
Doppler Effect An increase/decrease in the frequency of sound, light, or other waves
Created by: Karina_Vallejoo