Chapter 10 Science Test

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Section 1 The Nature of Waves

Question Answer
Wave -a repeating disturbance or movement that transfers _______ through matter or
molecules pass energy on to ______ molecules.nearby
waves carry energy without transporting ______.matter
all waves are produces by something that ______.vibrates
medium - a _______ through which a wave travels.
may be solid, liquid, or ______.
not all waves need a medium to travel through; example: ______.
matter; gas; uv-rays
mechanical waves - waves that can travel only through ______matter
transverse waves - matter in the medium moves back and forth _______ in the direction that the waves travels; example: right angles; water waves
compressional waves - matter in the medium moves ________ that the waves travels; example: ______.back and forth in the same direction; compression waves
combinations - not purely transverse or compressional; example: water waves, ______ waves.seismic

Section 2 Wave Properties

Question Answer
waves differ by:
how much ______ they carry
how ______ they travel.
energy ; fast
______ waves have crests- the highest points, and troughs- the lowest points.transverse
compressional waves have dense regions called ______ and less dense regions called ______.compressions ; rarefaction
wave length - the distance between one point in the wave and _________the nearest point just like it
frequency - how many ______ pass a fixed point each second.wavelengths
frequency is expressed in ______ ; as frequency increases, wavelengths ______ ; frequency of a wave equals the rate of ______ of the source that creates it.hertz (hz) ; shortens / decreases ; vibrations
wave ______, or v, describes how fast the wave moves forward.speed
______ (m/s) = wavelength (in m) x ______ (hz)speed (of a wave) ; frequency
light waves travel ______ than sound waves.faster
sound waves travel faster in ______ and liquids than in gas ; light waves travel faster in ______ and ______ than in liquids and solids.matter and liquids ; gases and empty space
a measure of energy in a wave.amplitude
the more energy a wave carries, the ______ its amplitude.greater
amplitude of ______ waves is related to how tightly the medium is pushed together at the compression ; the ______ the compressions, the larger the amplitude and the more energy the wave carries ; the less dense the rarefactions, the ______ the amplitude and the more energy the wave carries. / amplitude of ______ waves ; the distnace from the crest of trough of a wave to the ____________ of the medium ; example: how high an ocean wave appears above the water level.compressional ; denser ; larger ; transverse ; normal position

Section 3 The Behavior of Waves

Question Answer
reflection occurs when a wave strikes an object and ____________ of it. ; ______ type of waves can be reflected.bounces off ; all
the angle of incidence of a wave is always equal to the angle of ______. (comparison) ; ______ - an imaginary line perpendicular to a reflective surface. ; angle of ______ - the angle formed by the wave striking the surface and the normal. ; angle of ______ - the angle formed by the reflected wave and the normal.reflection ; normal ; incident ; reflection
the bending of wave caused by a change in its speed as it moves from once medium to another. ; the greater the change in speed is, the ______ the wave bends.refraction ; more
when a wave passes into a material that slows it down, the wave is bent ______ the normal.toward
when a wave passes into a material that speeds it up, the wave is bent ____________ the normal.away from
an object causes a wave to change direction and bend around it. ; if the obstacle is ______ than the wavelength, the wave diffracts a lot. ; if the obstacle is much ______ than the wavelength, the wave does not diffract much. ; the larger the obstacle is compared to wavelength, the ______ the waves will diffract.diffraction ; smaller ; larger ; less
the ability of two or more waves to combine and form a new wave. ; waves pass right through each other and continue in ____________. ; new wave exists only while the two original waves continue to ______. ; contructive interference - waves ______ together ; destructive interferance - waves ______ from each other.interferance ; two original directions ; overlap ; add ; subtract
a wave pattern that stays in one place. ; form when waves of equal ______ and amplitude are traveling in ______ directions continuously interfere with each other. ; ______ - the places where wto waves always cancel each other.standing waves ; wavelength ; opposite ; nodes
the ability of an object to vibrate by absorbing energy at it natural frequency.resonance