# Shared Flashcard Set

## Details

Mr. Wright - 8th Grade Physical Science
Physical Science Test 12
29
Science
02/13/2013

Term
 Yes or No   Constructive interference is always helpful.
Definition
 No
Term
 Yes or No   Beats have a lower frequency than the interfering waves that form them.
Definition
 Yes
Term
 Yes or No   Atomic clocks use the vivrations of cesium atoms to tell time.
Definition
 Yes
Term
 Yes or No   No damping occurs in ideal periodic motion.
Definition
 Yes
Term
 Yes or No   Periodic motion is rate in nature.
Definition
 No
Term
 When two waves interfere out of phase, they experience...
Definition
 destructive interference
Term
 When two waves interfere in phase, they experience...
Definition
 constructive interference
Term
 When a wave bounces off a surface that doesn't completely absorb its energy, it...
Definition
 reflects
Term
 A single wave cycle or very short burst of waves is called a(n)...
Definition
 pulse
Term
 The fastest waves in the universe are ____________ waves.
Definition
 electromagnetic
Term
 A pendulum's _________ energy is greatest at the bottom of its swing.
Definition
 kinetic
Term
 At the peak of a pendulum's swing, its _________ energy is greatest.
Definition
 gravitational potential
Term
 In periodic motion the opposite of damping is...
Definition
 resonance
Term
 The effect of friction on periodic motion is called...
Definition
 damping
Term
 Making a string _____ or ______ will cause it to vibrate more slowly.
Definition
 heavier; longer
Term
 While in the front yard, you can hear your dog barking in the backyard. This situation illustrates that sound waves can...
Definition
 diffract
Term
 After two waves collide, they...
Definition
 move on independently
Term
 Which is the best description for earthquake waves? -longitudinal -transverse -neither longitudinal nor transverse -both longitudinal and transverse
Definition
 both longitudinal and transverse
Term
 Which is the best description for sound waves? -longitudinal -transferse -neither longitudinal not transverse -both longitudinal and transverse
Definition
 longitudinal
Term
 Through which medium will sound waves travel the fastest?
Definition
 iron
Term
 Mechanical waves cannot travel through...
Definition
 a vacuum
Term
 All waves transmit...
Definition
 energy
Term
 To shorten the period of a pendulum, ....
Definition
 decrease the length of the arm
Term
 What force does not act on a pendulum?
Definition
 mass
Term
 What was the first known practical use for pendulums?
Definition
 Chinese seismoscope
Term
 Increasing the mass of a vibrating object will...
Definition
 increase its period
Term
 The unit s-1 is the SI unit for...
Definition
 frequency
Term
 On a wave diagram, be able to label the following:   crest, trough, wavelength, wave height, rest position, amplitude
Definition
Term
 Which is the best description for water waves? -longitudinal -transverse -neither longitudinal nor transverse -both longitudinal and transverse
Definition
 both longitudinal and transverse
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