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Energy Vocabulary 04

"6th Grade - Energy Vocabulary - 04"

QuestionAnswer
Intensity The amount of electricity, light, heat, or sound energy per unit area per unit time
Decibel A measurement used to compare the intensity of different sounds. Each increase of 10 decibels is a sound intensity 10 times greater
Dispersion The spreading out of energy as it travels away from the source of the energy. The decrease in intensity as distance from an energy source increases
Ear canal A tube like structure connecting the external ear to the eardrum
Eardrum The membrane separating the outer ear from the inner ear
Membrane A layer of tissue that serves as a covering, connection, or lining
Hammer The first in a series of three small bones in the middle ear
Anvil The second in a series of three small bones in the middle ear
Stirrup The third in a series of three small bones in the middle ear
Oval window An opening between the middle ear and the inner ear
Cochlea A spiral tube that makes up the part of the inner ear responsible for hearing
Cilia Tiny hairs that line the cochlea and help turn vibrations into nerve impulses
Auditory nerve A nerve that connects the inner ear with the brain and transmits sound, in the form of nerve impulses, to the brain
Wave A disturbance that travels through a medium from one place to another
Mechanical wave A transfer of energy through a medium without a transfer of the medium
Medium The material through which a mechanical wave travels
Longitudinal (compressional) wave A wave that causes a medium to vibrate in a direction parallel to the direction in which the wave travels
Transverse wave A wave that causes a medium to vibrate in a direction perpendicular to the direction in which the wave travels
Amplitude The height of the crest in a transverse wave; a measure of how compressed the compressions are in a longitudinal wave
Crest The highest point of a transverse wave
Trough The lowest point of a transverse wave
Wavelength The distance between two successive crests or troughs in a transverse wave or between two successive compressions in a longitudinal wave
Compression Region of a longitudinal wave where the particles of the medium have the highest density
Period The time required to complete one cycle of a wave
Frequency The number of crests or compressions in a wave that pass a point per unit time: for sound waves, measured in hertz (hz)
Speed of a wave The distance a wave travels (crest, trough, crest) in a given period of time. Speed of a wave can be calculated by multiplying wavelength by frequency
Reflection When the medium and energy in a wave is turned back from a hard surface
Reflect To turn back from a hard surface
Seismic Caused by an earthquake or vibrations inside Earth
Seismograph An instrument used to detect and record seismic waves
Pitch How high or low a sound is
Created by: Hushekclan on 2010-11-19



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