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64 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is a wave?
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A disturbance that transmits energy through matter or space.
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What do longitudinal waves consist of?
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Compressions and rarefactions
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What is a vibration?
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The complete back-and-forth motion of an object.
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Does air travel with sound waves?
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No, the air particles only vibrate back and forth with the object.
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If a tree fals in a forest, and no one is around to hear it, does it make a sound?
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Yes. Both the tree and the ground vibrate, creating compressions and rarefactions in the surrounding air.
A sound was created, it just wasn't detected. |
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What is a medium?
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A substance through which a wave can travel.
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Can sound travel in a vacuum?
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No.
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Which part of the ear acts as a funnel for sound waves?
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The outer ear
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In the ______ ear, three bones--the hammer, the anvil, and stirrup-- act as levers to increase the size of vibrations.
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Middle
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The ______ ear is where vibrations created by sound are changed into electrical signals for the brain to interpret.
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Inner
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What is the eardrum?
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A lightly stretched membrane that is the entrance to the middle ear.
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How is tinnitus caused?
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It happens from long term exposure to loud sounds.
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Who was the first person to travel faster than the speed of sound?
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Chuck Yeager
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What is the pitch of a sound?
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How high or low you perceive a sound to be.
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What is frequency?
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The number of waves produced in a given amount of time.
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What is hertz?
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The way frequency is measured.
(1 hz= 1 wave per second) |
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Sounds with frequencies that are lower than 20 Hz are described as _______.
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Infrasonic
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Sounds with frequencies that are higher that 200,000 Hz are are described at ________.
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Ultrasonic
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What is the doppler effect?
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The apparent change in frequency of a sound caused by the motion of either the listener or the source of the sound.
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What is loudness?
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How loud or soft a sound is perceived to be.
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What is the decibel (dB)?
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The most common unit to express loudness.
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What is an oscilloscope?
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An instrument that draws out sound waves.
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What is a crest?
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The highest point of a longitudinal wave.
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What is a trough?
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The lowest point in a longitudinal wave.
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What is a reflection?
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The bouncing back of a wave after it strikes a barrier
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What is an echo?
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A reflected sound.
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What is echolocation?
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The process of using reflected sound waves to find objects.
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What does sonar stand for?
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Sound Navigation And Ranging
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______ is the result of two or more waves overlapping.
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Interference
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What is a sonic boom?
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The explosive sound heard when a shock wave reaches your ears.
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A _________ is a result of interference in which portions of the wave are at the rest positions and other portions have a large amplitude.
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Standing wave
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_______ occurs when an object vibrating at or near a resonant frequency of a second object causes the second object to vibrate.
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Resonance
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What is diffraction?
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The bending of waves around barriers or through openings.
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The result of several pitches blending together through interference is ________.
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Sound quality
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Give some examples of string instruments.
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Cello,
violin, guitar, banjo, etc. |
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Give some examples of woodwind instruments.
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Saxophones,
oboes, flutes, recorders, etc. |
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Give some examples of brass instruments.
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Trumpet,
french horn, trombone, tuba, etc. |
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Give some examples of percussion instruments.
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Drums,
bongo, bells, cymbals, etc. |
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What can be described as any undesired sound, especially a nonmusical sound, that includes a random mix of piches.
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Noise
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When noise reaches a level that causes pain or damages the body, it is considered what?
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Noise pollution
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What is an electromagnetic wave?
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A wave that can travel through space or matter and consists of canging electric and magnetic fields.
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A ____ is a region around an object that can exert a force, a push or pull, on another object without actually touching the object.
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Field
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What is radiation?
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The emission of energy in the form of EM waves.
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About how fast is light?
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300,000,000 m/s
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What is the electromagnetic spectrum?
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The entire range of EM waves.
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Name the different types of EM waves.
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Radio waves
Microwaves Infrared Waves Visible Light Ultraviolet X Rays Gamma Rays |
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The Law of ________ states that the angle of incidence is equal to the angle of reflection.
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Law of Reflection
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Regular reflection occurs when-
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Light beams are reflected at the same angle.
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Diffuse reflection occurs when-
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Light beams are reflected at many different angles.
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The release of light energy by particles of matter that have absorbed energy is called what?
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Scattering
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The transfer of energy carried by light waves to particles of matter is called what?
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Absorption
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Fun fact: this turns the sky the blue color that it is!
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_______ is the bending of a wave as it passes at an angle from one medium to another.
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Refraction
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Example: Like when you put a straw into water and it looks like it has been cut in half.
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White light is composed of-
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All the different colors of visible light.
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The picture of the prism and rainbow is the symbol for what band?
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Pink Flloyd
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_______ is the bending of waves around barriers or through openings.
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Diffraction
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________ is a wave interaction that occurs when two or more wave overlap.
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Interference
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_______ is the passing of light through matter.
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Transmission
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What kind of matter is it easiest for someone to see through?
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Transparent
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What kind of matter is it somewhat difficult to see through?
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Translucent
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Through what kind of matter is it impossible to see through?
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Opaque
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Fact:
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When white light shines on a strawberry, only red light is reflected. All other colors of light are absorbed. Therefore, the strawberry looks red to you.
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What are the primary colors of light?
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Blue
Red Green |
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What are the secondary colors of light?
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Yellow
Magenta Cyan |
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What are the primary colors of pigments?
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Yellow
Cyan Magenta |
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