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Waves
7th grade Vocab for 'Waves'
Vocabulary Word | Definition |
---|---|
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 |