WorksheetsUnit 9- Electricity & Waves Vocabulary
Total questions: 29
Worksheet time: 15mins
Name
Class
Date
1.
Electric current that flows only in one direction.
a)
electricity
b)
alternating current
c)
direct current
d)
wavelength
2.
Related to the loudness of a sound wave, corresponds to the amount of energy the wave carries.
a)
wave
b)
amplitude
c)
frequency
d)
wavelength
3.
An electric force that causes free electrons to move from one atom to another. Also known as potential difference.
a)
resistance
b)
frequency
c)
current
d)
voltage
4.
Circuit in which electric current has only one path to follow.
a)
amplitude
b)
voltage
c)
series
d)
parallel
5.
The distance between one point on a wave and the nearest point just like it
a)
diffraction
b)
amplitude
c)
wavelength
d)
frequency
6.
The low point of a wave.
a)
wavelength
b)
crest
c)
amplitude
d)
trough
7.
Occurs when two waves overlap and combine to form a smaller wave.
a)
destructive interference
b)
constructive interference
c)
refraction
d)
diffraction
8.
A physical phenomenon that can produce light, heat and power.
a)
current
b)
voltage
c)
electricity
d)
resistance
9.
The bending of waves around an obstacle; can also occur when waves pass through a narrow opening.
a)
diffraction
b)
refraction
c)
rarefaction
d)
reflection
10.
The bending of a wave as it changes speed in moving from one medium to another.
a)
diffraction
b)
refraction
c)
rarefaction
d)
reflection
11.
The number of wavelengths that pass a fixed point each second; is expressed in Hertz (Hz).
a)
frequency
b)
voltage
c)
wavelength
d)
amplitude
12.
Change in pitch or frequency that occurs when a source of a sound is moving relative to a listener.
a)
doppler effect
b)
refraction
c)
diffraction
d)
interference
13.
Occurs when two or more waves overlap and combine to form a new wave which is either smaller or larger than the original waves
a)
refraction
b)
reflection
c)
interference
d)
diffraction
14.
Waves created by vibrating electric charges, can travel through a vacuum or through matter, and have a wide variety of frequencies and wavelengths.
a)
mechanical
b)
electromagnetic
c)
longitudinal
d)
transverse
15.
A wave in which the wave's medium is compressed in the same direction as the movement as the wave
a)
mechanical
b)
electromagnetic
c)
longitudinal
d)
transverse
16.
The least dense regions of a longitudinal wave.
a)
crest
b)
trough
c)
compression
d)
rarefaction
17.
Tendency for a material to oppose electron flow and change electrical energy into thermal energy and light. Measured in Ohms (Ω)
a)
current
b)
resistance
c)
voltage
d)
electricity
18.
Electric current that reverses its direction of flow in a regular pattern.
a)
alternating current
b)
direct current
c)
electromagnetic current
d)
square wave current
19.
A wave that requires a medium to transfer energy.
a)
mechanical
b)
electromagnetic
c)
longitudinal
d)
transverse
20.
A solid, liquid, or gas that a wave travels through
a)
medium
b)
trough
c)
wavelength
d)
amplitude
21.
A measure of the energy carried by a wave. The height of the peaks above the resting line in a wave.
a)
wavelength
b)
frequency
c)
amplitude
d)
rarefaction
22.
A repeating disturbance or movement that transfers energy through matter or space.
a)
medium
b)
wave
c)
amplitude
d)
diffraction
23.
The bouncing of waves off of a boundary.
a)
diffraction
b)
refraction
c)
rarefaction
d)
reflection
24.
States that the current in a circuit equals the voltage difference divided by the resistance.
a)
Ohm's Law
b)
Doppler Effect
c)
Volts Law
d)
Ampere's Law
25.
A wave that travels through a medium causing it to vibrate and produce audible noise.
a)
mechanical
b)
electromagnetic
c)
longitudinal
d)
transverse
26.
The highest point of a wave.
a)
wavelength
b)
crest
c)
amplitude
d)
trough
27.
Occurs when two waves overlap and combine to form a larger wave.
a)
destructive interference
b)
constructive interference
c)
refraction
d)
diffraction
28.
The net movement of electric charges in a single direction. A rate measured in Amperes (A).
a)
voltage
b)
current
c)
resistance
d)
frequency
29.
Circuit in which electric current has more than one path to follow.
a)
parallel
b)
series
c)
meridian
d)
longitudinal
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