VIDEOS: http://www.youtube.com/playlist?list=PLn3BINlzsOQKKbPcBaL_unmcTDyiEXBwk
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| absorption | the taking in of a wave's energy
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| amplitude | the distance from the midpoint of a wave to a crest or a trough
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| compression | a part of a longitudinal wave where the particles get pushed closer together
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| crest | the highest point of a transverse wave
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| frequency | the number of waves that pass a point in a given amount of time
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| inner ear | the part of the ear that transmits information about vibrations to the brain (cochlea, semi-circular canals)
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| compressional/longitudinal wave | a wave in which the particles of the medium vibrate parallel to the path of the wave
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| mechanical wave | a wave that requires a medium
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| medium | a material through which mechanical waves can travel through
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| middle ear | the part of the ear that transfers vibrations from the outer ear to the inner ear (hammer, anvil, stirrup)
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| outer ear | the part of the ear that gathers sound vibrations (pinna, outer ear canal, eardrum)
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| rarefaction | the part of a longitudinal wave where the particles are spread apart
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| transverse wave | a wave in which the particles of the medium vibrate in a direction perpendicular to the path of the wave
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| trough | the lowest point of a transverse wave
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| vibration | a repeated back-and-forth motion
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| wave | a disturbance that transfers energy through matter and space
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| wavelength | the distance from any point on a wave to the identical point on the next wave
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| wave speed | the distance a wave travels per unit of time
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| electromagnetic waves | a disturbance that can transfer energy through a vacuum or through matter
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| reflection | the bouncing back of waves when they strike the surface of a new medium
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| color filter | a piece of transparent material, such as colored glass, that absorbs some frequencies of light and transmits others
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| convex lens | a lens that is thicker in the middle than it is at the edges
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| cornea | the transparent layer that makes up the front of the eye
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| diffraction grating | a device that separates white light into colors by means of many narrow slits
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| electromagnetic spectrum | the range of all frequencies of electromagnetic waves
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| infrared radiation | electromagnetic waves with frequencies below those of visible red light
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| lens | the part of the eye that focuses light
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| opaque | allowing no light waves to be transmitted
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| optic nerve | the nerve that carries information from the retina to the brain
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| plane mirror | a flat, smooth surface that can reflect light and produce a clear image
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| prism | a transparent object that separates white light into the different colors that make up white light
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| refraction | the bending of waves caused by a change in their speed as the pass from one medium to another
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| retina | a light-sensitive layer at the back of the eye
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| translucent | transmitting some light but scattering it
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| transmission | the passing of waves through a medium
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| transparent | transmitting most light waves; clear
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| ultraviolet radiation | electromagnetic waves with frequencies higher than those of visible violet light
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| visible light | electromagnetic waves that can be detected by the human eye
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| visible light spectrum | the full range of electromagnetic waves that can be detected by the human eye
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| anvil | (also called the incus) a tiny bone in the middle ear that passes vibrations from the hammer to the stirrup
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| 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
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| eardrum | (also called the tympanic membrane) a thin membrane that vibrates when sound waves reach it
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| echoes | reflections of sound waves
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| 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.
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| hammer | (also called the malleus) a tiny bone in the middle ear that passes vibrations from the eardrum to the anvil
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| nerves | these carry electro-chemical signals from the inner ear (the cochlea) to the brain
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| outer ear canal | the tube through which sound travels to the eardrum
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| 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
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| 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)
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To hide a column, click on the column name.
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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