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TLC 8th Waves Test

VIDEOS: http://www.youtube.com/playlist?list=PLn3BINlzsOQKKbPcBaL_unmcTDyiEXBwk

TermDefinition
absorption the taking in of a wave's energy
amplitude the distance from the midpoint of a wave to a crest or a trough
compression a part of a longitudinal wave where the particles get pushed closer together
crest the highest point of a transverse wave
frequency the number of waves that pass a point in a given amount of time
inner ear the part of the ear that transmits information about vibrations to the brain (cochlea, semi-circular canals)
compressional/longitudinal wave a wave in which the particles of the medium vibrate parallel to the path of the wave
mechanical wave a wave that requires a medium
medium a material through which mechanical waves can travel through
middle ear the part of the ear that transfers vibrations from the outer ear to the inner ear (hammer, anvil, stirrup)
outer ear the part of the ear that gathers sound vibrations (pinna, outer ear canal, eardrum)
rarefaction the part of a longitudinal wave where the particles are spread apart
transverse wave a wave in which the particles of the medium vibrate in a direction perpendicular to the path of the wave
trough the lowest point of a transverse wave
vibration a repeated back-and-forth motion
wave a disturbance that transfers energy through matter and space
wavelength the distance from any point on a wave to the identical point on the next wave
wave speed the distance a wave travels per unit of time
electromagnetic waves a disturbance that can transfer energy through a vacuum or through matter
reflection the bouncing back of waves when they strike the surface of a new medium
color filter a piece of transparent material, such as colored glass, that absorbs some frequencies of light and transmits others
convex lens a lens that is thicker in the middle than it is at the edges
cornea the transparent layer that makes up the front of the eye
diffraction grating a device that separates white light into colors by means of many narrow slits
electromagnetic spectrum the range of all frequencies of electromagnetic waves
infrared radiation electromagnetic waves with frequencies below those of visible red light
lens the part of the eye that focuses light
opaque allowing no light waves to be transmitted
optic nerve the nerve that carries information from the retina to the brain
plane mirror a flat, smooth surface that can reflect light and produce a clear image
prism a transparent object that separates white light into the different colors that make up white light
refraction the bending of waves caused by a change in their speed as the pass from one medium to another
retina a light-sensitive layer at the back of the eye
translucent transmitting some light but scattering it
transmission the passing of waves through a medium
transparent transmitting most light waves; clear
ultraviolet radiation electromagnetic waves with frequencies higher than those of visible violet light
visible light electromagnetic waves that can be detected by the human eye
visible light spectrum the full range of electromagnetic waves that can be detected by the human eye
anvil (also called the incus) a tiny bone in the middle ear that passes vibrations from the hammer to the stirrup
cochlea a spiral-shaped, fluid-filled inner ear structure; it is line with cilia (tiny hairs) that move when vibrated and cause a nerve impulse to form
eardrum (also called the tympanic membrane) a thin membrane that vibrates when sound waves reach it
echoes reflections of sound waves
Eustachian tube a tube that connects the middle ear to the back on the nose; equalizes the pressure between the middle ear and the air outside. When you "pop" your ears as you change altitude, you are equalizing the air pressure in your middle ear.
hammer (also called the malleus) a tiny bone in the middle ear that passes vibrations from the eardrum to the anvil
nerves these carry electro-chemical signals from the inner ear (the cochlea) to the brain
outer ear canal the tube through which sound travels to the eardrum
semicircular canals three loops of fluid-filled tubes that are attached to the cochlea in the inner ear; helps us maintain our sense of balance
stirrup (also called the stapes) a tiny, U-shaped bone in the middle ear that passes vibrations to the cochlea--smallest bone in the human body (it is 0.25 to 0.33 cm long)
Created by: 00012747