Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

8th Unit 3

Energy: Sound & Light Key Terms

TermDefinition
Acoustics The science of sound: Study of the interaction between sound waves and objects
Amplification Producing sounds that have more intensity than where they were originally produced
Compression Moving molecules closer together as in a gas
Compression wave (longitudinal wave) A wave produced where molecules are pushed closer together and then rebound to their normal position
Crest The highest point of a transverse wave
Density The ratio of mass versus volume: D= m/V
Doppler Effect When sound waves of an object moving relative to the observer take on a different frequency than if they were stationary.
Frequency The number of waves that pass a given point in a given amount of time.
Inner ear Inner most part of the ear that contains the cochlea and nerve endings
Intensity The loudness of sound
Mach I An object reaches this point when it breaks the sound barrier
Medium A substance that sound can travel through
Middle ear The part of the ear that contains the ossicles (ear bones)
Outer ear The part of the ear that receives sound input from the outside world
P wave Primary compression wave that occurs during an earthquake
Pitch The high or low effect of sound based on frequency
Rarefaction The decompression of a compression wave
S wave The transverse wave associated with an Earthquake
Seismograph An instrument that records seismic waves
Sonic Boom The release of a massive sound wave that occurs when an object breaks the sound barrier
Sound barrier The point at which an object exceeds the speed of sound
Sound wave A compression wave that carries energy to a natural or artificial device that can detect pressure changes
Speed of sound 343.2 meters per second or 1,126 ft/s. This is equivalent to 1,236 kilometers per hour or 768 mph
Supersonic An object that can break the sound barrier
Tinnitus Ringing or hissing in the ear as a result of listening to high frequency or high intensity sounds
Trough The lowest part of a transverse wave
Transverse wave A wave that moves energy in one direction but travels in a path that oscillates up and down in equal directions
Wavelength The distance between two crests in a transverse wave or the distance between the compressions of a compression wave.
Angle of incidence The angle at which light hits a reflective surface
Angle of reflection The angle at which light leaves a reflective surface
Diffraction The apparent bending of waves around small obstacles and the spreading out of waves past small openings
Electromagnetic radiation Energy that moves as both a particle and a wave that can travel through any medium
Electromagnetic spectrum The range of all possible wavelengths of electromagnetic radiation
Fiber optics Optical fibers that can carry light over long distances that are used in communication and data transfer
LASER Light Amplification by Stimulated Emission of Radiation
Lens An optical device which transmits and refracts light, converging or diverging the beam.
Mirror A substance that can reflect light efficiently
Photon A bundle of light energy that moves as both a particle and a wave
Primary colors Colors that can be added or subtracted from one another to create other colors. Red, Blue, Green, Cyan, Magenta and Yellow.
Prism A substance that can refract white light separating it into its colored components
Reflection The change in direction of a wave from the surface of a reflective material.
Refraction The bending of a wave when it enters a medium where it's speed changes due to differences in density.
Speed of light The speed at which light travels in a vacuum. (3.00 x 108 m/s)
Wave particle duality Explains the wave and particle characteristics that light exhibits.
Decibel Unit of sound intensity
Created by: darrin_evans