Ch 9, 8th Grade Question Preview (ID: 61032)


Waves. TEACHERS: click here for quick copy question ID numbers.

A disturbance involving the transfer of energy from place to place
a) wave
b) medium
c) energy
d) interference

Which of the following can be a medium for waves?
a) all of the above
b) solids
c) liquids
d) gases

Waves that require a medium to travel are called
a) mechanical waves
b) magnetic waves
c) electromagnetic waves
d) light waves

A low point of a wave is called a
a) trough
b) crest
c) compression
d) amplitude

A ___ is an area where particles are close together on a longitudinal wave
a) compression
b) rarefaction
c) trough
d) crest

Surface waves travel along a surface that
a) separates two mediums
b) is very deep
c) is very dense
d) is made of solids

Surface waves
a) both
b) vibrate up and down
c) move back and forth slightly
d)

The distance between two crests is a wave's
a) wavelength
b) amplitude
c) frequency
d) speed

The bending of a wave due to a change in speed is called
a) refraction
b) interference
c) diffraction
d) reflection

Two waves are traveling towards each other. The crests of the waves meet. What happens?
a) constructive interference
b) destructive interference
c) diffraction
d) refraction

What is the angle of reflection if a wave enters a mirror at an angle of 65 degrees?
a) 65 degrees
b) 25 degrees
c) 90 degrees
d) 115 degrees

The more energy a wave has, the greater its
a) amplitude
b) rest position
c) wavelength
d) all of the above

The wavelength of a longitudinal wave can be measured by measuring the distance between
a) compressions
b) crests
c) troughs
d) none of the above

If two waves pass every second, the frequency of the wave is
a) 2 Hz
b) 2 m/s
c) 2 seconds
d) 20 Hz

Light waves travel slower than sound waves.
a) false
b) true
c)
d)

The line perpendicular to the surface at the point where reflection occurs
a) normal
b) resting point
c) node
d) antinode

Light travels in a straight line except when
a) it enters a new medium at an angle
b) it enters a new medium straight on
c) it never travels in a straight line
d)

A wave moving around a barrier and bending is an example of
a) diffraction
b) diffusion
c) refraction
d) infraction

If two troughs overlap, they make a
a) deeper trough
b) smaller crest
c) smaller trough
d) no trough

If a crest and a trough have equal amplitudes and combine, they will
a) completely cancel
b) make a trough with a small crest
c) make a crest with a small trough
d) always make a crest

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