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Grade 7 Wave Unit Test Revision

Total questions: 173

Worksheet time: 3hrs 4mins

Name
Class
Date
1.

Sound is a form of energy produced by ______________.

a)

Vibrations

b)

Distances

c)

Prisms

d)

Forces

2.

Sound waves travel the FASTEST through _____________.

a)

Gases

b)

Liquids

c)

Solids

3.

An object that does not vibrate cannot produce

a)

Sound

b)

Light

c)

Heat

d)

Electricity

4.

A place where no sound exists is...

a)

in the air.

b)

under water.

c)

in a vacuum.

d)

all of the above

5.

Why do we see lightning before we hear the thunder?

a)

Our eyes trick us.

b)

Light travels faster than sound.

c)

they're two separate things.

6.

________ describes how LOUD a sound is.

a)

Amplitude

b)

Frequency

7.

____________ is determined by sound's frequency

a)

Compression

b)

Pitch

8.

A sound with a high frequency has a _____ pitch. A sound with a ____ frequency has a low pitch.

a)

high, low

b)

low, high

c)

medium, high

d)

high, medium

9.

______________ sounds have a larger amplitude

a)

Quiet

b)

Loud

10.

What is this?

a)

Ear Drum

b)

Ear Canal

c)

Nerve

d)

Cochlea

11.
If you want to change the pitch of a sound, you have to change the ___
a)
frequency
b)
amplitude
c)
speed
d)
volume
12.
The speed of a sound wave depends on
a)
the frequency
b)
the medium
c)
both air temperature and medium
d)
the air temperature
13.
What unit is the intensity of sound measured in?
a)
decibels (dB)
b)
Hertz (Hz)
c)
meters per second (m/s)
d)
meters
14.
A part in a longitudinal wave where the particles are spread apart
a)
compression
b)
rarefaction
c)
crest
d)
trough
15.
A disturbance that transfers energy from one place to another without transferring energy
a)
wave
b)
trough
c)
pitch
d)
sound
16.
When a sound is louder what measurement gets bigger?
a)
Frequency 
b)
Amplitude 
c)
Wavelength 
d)
Crest
17.
Why is sound able to travel faster through a solid than a gas?
a)
Gas molecules are packed tightly.
b)
Sound does not travel faster through a solid than a gas.
c)
Solid molecules are packed tightly.
d)
Gas molecules move slowly.
18.

Which of the following sound wave produces the highest pitch of sound?

a)
b)
c)
d)
19.

Choose the correct statements. (2 answers)

a)

P - The loudness increases

b)

Q - The pitch decreases

c)

R - The loudness decreases

d)

S - The pitch increases

20.

Diagram shows 3 types of sound waves generated from speaker. Which of the following statements is true?

a)

P has a higher pitch than Q

b)

Q has a higher pitch than R

c)

R has the highest pitch

d)

P, Q and R have the same pitch

21.

Which waveform has the lowest frequency?

a)

(a)

b)

(b)

c)

(c)

d)

(d)

e)

(e)

22.

Frequency is measured in the unit of

a)

Ampere (A)

b)

Hertz (Hz)

c)

Mole (mol)

d)

Meter (m)

23.

The human ear can only sense within the frequency range of _____.

a)

20 Hz to 20,000 Hz

b)

1,000 Hz to 100, 000 Hz

24.

Vibrational frequencies beyond 20,000 Hz is called _____.

a)

infrasonic frequencies

b)

ultrasonic frequencies

25.

It determines the s loudness or volume of a sound wave.

a)

frequency

b)

amplitude

26.

A high amplitude sound means _____ sound, and a low amplitude sound means _____ sound.

a)

softer, louder

b)

louder, softer

c)

louder, louder

d)

softer, softer

27.

On the decibel scale, an increase of 1 dB means that sound intensity is increased by a factor of _____.

a)

2

b)

5

c)

10

d)

100

28.

How much louder is a 40 dB sound compared with a 30 dB sound

a)

one time

b)

ten times

c)

hundred times

d)

thousand times

29.

In which of these places could you NOT hear sound?

a)
b)
c)
d)
30.

In which material do sound travels the fastest?

a)
b)
c)
d)
31.

Which of these sounds is the loudest?

a)
b)
c)
d)
32.

The vibrating loudspeaker cone makes the air molecules next to it move _______________.

a)

back and forth

b)

up and down

33.

True or False: Sound waves are faster than light.

a)

False

b)

True

34.

What does 1 represent?

a)

time

b)

speed

c)

amplitude

d)

wavelength

35.

What is the function of the ridges on your outer ear?

a)

They prevent germs from entering your middle ear.

b)

They direct sound into your middle ear.

c)

They prevent loud noises from damaging your inner ear.

d)

They filter out very high and low-frequency sounds.

36.

How are sound waves like ripples in a pond?

a)

They are both types of electromagnetic radiation.

b)

They travel faster in water than they do in the air.

c)

They radiate outward from a central point.

d)

They have the same wavelengths.

37.

How is your eardrum like a real drum?

a)

It produces sound.

b)

It vibrates.

c)

It is frequently struck by the bones in your middle ear.

d)

It is hollow.

38.

What is unique about the hammer, stirrup, and anvil?

a)

They are the smallest bones in your body

b)

They are the only bones in your body that move

c)

They are the only bones located in your head

d)

They are the only bones that cannot be broken

39.

If your inner ear lacked nerve fibers, what might happen?

a)

Sound would be unable to travel to your brain.

b)

Your eardrum would be unable to vibrate.

c)

Your hammer could not tap against your anvil.

d)

Sound waves could not enter your ear.

40.

Place the following events in sequence: A) Your eardrum begins vibrating; B) Electrical impulses travel along nerve fibers; C) The hammer, anvil, and stirrup begin moving

a)

B, C, A

b)

A, B, C

c)

B, A, C

d)

A, C, B

41.

Which word best describes the auditory (ear) canal?

a)

Filled with water

b)

Hollow

c)

Lined with sensitive nerve fibers

d)

Vibrating

42.

Which part is where vibrations are turned into nerve impulses?

a)

E

b)

H

c)

C

d)

I

43.

The auditory canal is at

a)

I

b)

B

c)

D

d)

H

44.

Sound is best described as

a)

a frequency

b)

vibrations in air

c)

vibrations in the eardrum

d)

nerve impulses heading to the brain

45.

One of the components of a sound is pitch. Pitch is determined by the _____ of a sound wave.

a)

amplitude

b)

complexity

c)

frequency

d)

depth

46.

The ________ ear collects sounds waves and transmits them to the ________ ear, which contains auditory ossicles.

a)

superficial; deep

b)

outer; middle

c)

inner; middl

d)

middle; inne

e)

outer; inner

47.
When sound waves cause the eardrum to vibrate, these vibrations are immediately passed on to the_________.
a)
outer ear and ear canal
b)
inner ear
c)
tiny hairs
d)
three small bones in the middle ear
48.
Where are the three smallest bones in your body found? 
a)
outer ear
b)
middle ear
c)
inner ear
d)
eye
49.

The auditory nerve sends signals to the ....

a)

cochlea

b)

ear drum

c)

brain

50.
Sounds travels slowest through...
a)
space
b)
solids/metals
c)
gas
d)
liquids
51.
The amount of energy a wave carries corresponds with its ____.
a)
crest
b)
wavelength
c)
amplitude
d)
period
52.

The picture shows 4 sound waves on an oscilloscope. Which has the highest pitch?

a)

A

b)

B

c)

C

d)

D

53.

The picture shows 4 sound waves on an oscilloscope. What can you say about A?

a)

It is a very low pitched sound

b)

It is a very high pitched sound

c)

It is a very quiet sound

d)

It is a very loud sound

54.

The picture shows 4 sound waves on an oscilloscope. Which 2 have the smallest amplitude?

a)

A

b)

B

c)

C

d)

D

55.

Which statement is true of sound waves. Select 2 answers.

a)

They are made by objects vibrating

b)

They are detected because they make our ear drum vibrate

c)

They are transverse waves

d)

They travel faster in air than in water.

56.

What is the height of a wave called?

a)

Peak

b)

Wavelength

c)

Amplitude

d)

Frequency

57.

Sound waves are caused by the (a)   of particles

58.

The distance between 2 crests or troughs

a)

wavelength

b)

amplitude

c)

frequency

d)

wave speed

59.

The speed of sound is about...

a)

30 m/s

b)

300 m/s

c)

30 000 m/s

d)

300 00 0m/s

60.

a)

A

b)

B

61.

a)

A

b)

B

62.

Select the correct answer: Ultrasound are...

a)

sounds that only dolphins can produce

b)

sounds that have a frequency above 20 000Hz

c)

sounds that only superheroes can hear

d)

sounds that are below 20 000Hz

63.

__________ is when a wave bounces off a surface

a)

reflection

b)

absorption

c)

transmission

d)

diffraction

64.

How would you describe this cup?

a)

opaque

b)

translucent

c)

transparent

65.

A white surface absorbs all the color of light.

a)

TRUE

b)

FALSE

66.

Materials that do not let any light pass through them.

a)

opaque

b)

transparent

c)

transluecent

d)

reflective material

67.

Matter that transmits light is _______________.

a)

opaque

b)

transparent

c)

transluscent

d)

reflective material

68.

What is the best description of an opaque material?

a)

no light passes through the material

b)

some light passes through the material

c)

all light passes through the material

69.

What is the best description of a transparent material?

a)

no light passes through the material

b)

some light passes through the material

c)

all light passes through the material

70.

What is the best description of a translucent material?

a)

no light passes through the material

b)

some light passes through the material

c)

all light passes through the material

71.

What type of object is shown in the picture?

a)

opaque

b)

transparent

c)

translucent

72.

What type of object is the glass in the glasses considered?

a)

opaque

b)

transparent

c)

translucent

73.

What type of object is a mirror considered?

a)

opaque

b)

transparent

c)

translucent

74.
_____?______ materials do not allow light waves to pass through.
a)
Opaque
b)
Transparent
c)
Translucent
75.

The image shows an object that is __________.

a)

transparent

b)

translucent

c)

opaque

76.

The image shows an object that is __________.

a)

transparent

b)

translucent

c)

opaque

77.

The image shows an object that is __________.

a)

transparent

b)

translucent

c)

opaque

78.
What is this
a)
translucent
b)
opaque
c)
transparent
79.

These bottles are

a)

transparent

b)

translucent

c)

opaque

80.

These milk jugs are

a)

transparent

b)

translucent

c)

opaque

81.

Electromagnetic radiation that you can see

a)

Sound

b)

Light

c)

Temperature

d)

Photons

82.

What is the best explanation for Mickey seeing himself in the mirror?

a)

refraction

b)

absorbed

c)

reflection

d)

flipped

83.
a)
Reflection
b)
Refraction
84.
We see shadows because light travels in a __________________ line.
a)
curved
b)
straight
c)
rainbow
85.
........... – the angle between the normal and the reflected ray.
a)
Angle of incidence
b)
Angle of reflection
c)
Angle of coincidence
d)
Angle of direction
86.
........... – the angle between the normal and the incident ray.
a)
Angle of incidence
b)
Angle of reflection
c)
Angle of coincidence
d)
Angle of direction
87.
Which term describes when light bounces off of a smooth surface?  
a)
Refraction
b)
Transmission
c)
Absorption
d)
Reflection
88.
The imaginary line perpendicular to a reflecting surface is called _____.
a)
crooked line
b)
parallel line
c)
angular line
d)
normal line
89.

In the diagram, which letter represents the angle of incidence?

a)

A

b)

B

c)

C

d)

D

90.
The illustration shows a light ray striking an object.
In the illustration, the light ray striking the object is-
a)
absorbed
b)
stopped
c)
reflected
d)
refracted
91.
MCQ 020
Which diagram shows the correct image of the key in a plane mirror?
a)
A
b)
B
c)
C
d)
D
92.

Characteristics of a image formed by a plane mirror. Check all that applies.

a)

inverted

b)

same size as the object

c)

laterally inverted

d)

real

93.

What type of reflection will this image produce?

a)

Regular Reflection

b)

Diffuse Reflection

94.
The imaginary line perpendicular to a reflecting surface is called _____.
a)
crooked line
b)
parallel line
c)
angular line
d)
normal line
95.
Why can you see most objects? 
a)
they emit light
b)
light refracts through them
c)
light reflects off them
d)
They absorb light
96.

An object was placed in front of the plane mirror as shown in the given picture. How will its image formed in plane mirror look like ?

a)
b)
c)
d)
97.

What is a stream of light called?

a)

A) Ray

b)

B) Beam

c)

C) Twilight

d)

D) Sunlight

98.

Which diagram represents diffuse reflection?

a)

A

b)

B

c)

C

d)

D

99.
Section B1a
Given that the angle of incidence = 30 degrees
a. Draw a ray diagram, labelling clearly the normal, incident ray, angle of incidence, reflected ray and angle of reflection accurately.
Which is the correct diagam? 
a)
A
b)
B
c)
C
d)
D
100.

In order to see a picture it must

a)

produce light

b)

reflect light

c)

absorb light

101.

To get the best reflection from a mirror you need

a)

a very shiny surface to reflect lots of light

b)

to stand right in front of it

c)

to shine a bright light on it

d)

it to produce light

102.
MCQ 08
If a capital letter R is seen in an ordinary mirror, what does it look like?
a)
A
b)
B
c)
C
d)
D
103.

This reflection is

a)

specular.

b)

diffuse.

104.

Type of mirror found in a bathroom...

a)

Plane

b)

Convex

c)

Concave

105.
The ray of light that strikes a reflecting surface is called ________.
a)
incident ray
b)
reflected ray
c)
normal ray
d)
none of the above
106.

The image appears to be _________________ from the mirror as the object.

a)

nearer to

b)

further away from

c)

the same distance from

107.

The image in the mirror is ________________ the object.

a)

bigger than

b)

smaller than

c)

the same size as

108.

You can see a reflection in the mirror which is known as ______________.

a)

image

b)

picture

c)

object

d)

shadow

109.

You cannot see an image using a rough surface like paper. This is because light _____________ hitting the paper are _______________ in all directions.

a)

rays, scattered

b)

rays, absorbed

c)

streams, scattered

d)

streams, absorbed

110.

The angle of incidence is ________________ the angle of reflection.

a)

bigger than

b)

equal to

c)

smaller than

d)

cannot tell

111.

A student placed a pencil in a cup of water. The pencil appears broken because light

a)

always travels in a straight line.

b)

bends when it passes through water.

c)

makes the water in the glass evaporate.

d)

reflects the pencil on the water's surface.

112.

When light passes at an angle to the normal from one medium into another in which its speed is higher

a)

it is bent toward the normal.

b)

it always lies along the normal.

c)

it is unaffected.

d)

it is bent away from the normal.

113.

When light passes at an angle to the normal from one medium into another in which its speed is lower

a)

it is bent towards the normal.

b)

it always lies along the normal.

c)

it is unaffected.

d)

it is bent away from the normal.

114.
Light has the lowest velocity in which medium?
flint glass n=1.70
barium glass n=1.60
crown glass n=1.523
water n=1.33
diamond n=2.45
a)
diamond
b)
water
c)
flint glass
d)
barium glass
115.

Based on the image, as light passes from medium 1 to medium 2

a)

light speeds up and bends towards the normal

b)

light speeds up and bends away from the normal

c)

light slows down and bends towards the normal

d)

light slows down and bends away from the normal

116.
How does light behave as it enters these mediums?
a)
continue its path as straight line.
b)
bends toward the normal
c)
bends away from the normal
d)
reflects
117.
We can see objects because of_______
a)
reflection
b)
refraction
c)
transmission
d)
diffraction
118.
This shows the phenomenon known as....
a)
reflection
b)
refraction
c)
mirrors
d)
focal point
119.
Glass has a _____________ index of refraction than air.
a)
Equal
b)
Greater
c)
Less
d)
Impossible to say
120.
According to the Law of reflection, a light ray striking a mirror
a)
continues moving through the mirror in the same direction
b)
moves into the mirror at a slightly different angle
c)
bounces off the mirror toward the direction it came from
d)
bounces off the mirror at the same angle it hits.
121.
The image formed in a flat mirror is
a)
larger than the object and farther away.
b)
reduced and closer to the mirror.
c)
a real image of the object.
d)
equal to the height and distance of the object.
122.
a)
Reflection
b)
Refraction
123.

As a light wave moves from a faster medium to a slower medium, its speed

a)

does not change

b)

slows down

c)

speeds up

124.

Choose all examples of refraction

a)
b)
c)
d)
125.

Light refracts when:

a)

It changes speed

b)

It changes from a particle to a wave

c)

Its density changes

d)

It encounters a solid object

126.

When light passes from a dense medium into a less dense medium

a)

it is bent toward the normal.

b)

it always lies along the normal.

c)

it is unaffected.

d)

it is bent away from the normal.

127.

The color that reflects all visible light waves is:

a)

White

b)

Black

c)

Green

d)

Yellow

128.

Light waves bending through a prism is an example of:

a)

Reflection

b)

Refraction

c)

Absorption

129.

A black shirt capturing light waves and making a person feel hot in the summer is an example of:

a)

Reflection

b)

Refraction

c)

Absorption

130.

The place where the optic nerve leaves the retina, where there are no light-sensitive cells is the ________________.

a)

lens

b)

cornea

c)

blind spot

d)

sclera

131.

The tough, clear covering over the iris and pupil that helps protect the eye is the __________________.

a)

retina

b)

lens

c)

sclera

d)

cornea

132.

The ______________ is a muscle that controls how much light enters the eye.

a)

iris

b)

pupil

c)

cornea

d)

blind spot

133.

The layer of light-sensitive cells at the back of the eye that detects images focused by the cornea and the lens is called the ___________________.

a)

blind spot

b)

sclera

c)

retina

d)

optic nerve

134.

The ________________ is the dark circle in the center of your iris that lets light into the inner eye.

a)

retina

b)

cornea

c)

iris

d)

pupil

135.

The bundle of fibers that carry information from the retina to the brain is called the ____________________.

a)

optic nerve

b)

blind spot

c)

vitreous humor

d)

aqueous humor

136.

A clear, flexible structure that makes an image on the eye's retina. The _______________ is flexible so that it can change shape, focusing on objects that are close up and objects that are far away.

a)

lens

b)

cornea

c)

pupil

d)

retina

137.

Identify the part of the eye colored red in this diagram.

a)

cornea

b)

pupil

c)

iris

d)

sclera

138.

Identify the part of the eye that the red circle is touching in the diagram.

a)

vitreous humor

b)

aqueous humor

c)

lens

d)

cornea

139.
What is letter I?
a)
Cornea
b)
Lens
c)
Vitreous humor
d)
Optic nerve
140.
What is letter B
a)
Optic nerve
b)
Lens
c)
Cornea
d)
Retina
141.
What is letter E?
a)
Vitreous humor
b)
Retina
c)
Cornea
d)
Optic nerve
142.
What is letter G?
a)
Sclera
b)
Retina
c)
Lens
d)
Vitreous humor
143.
This is used to separate white light into colors. 
a)
prism
b)
reflection
c)
sunlight
d)
spectrum
144.
What is the correct order of the colors of the rainbow?
a)
Red, Yellow, Orange, Blue, Indigo, Violet
b)
Red, Orange, Yellow, Green, Blue, Indigo, Violet
c)
Yellow, Orange, Red, Green, Blue, Violet, Indigo
145.

What type of wave is light?

a)

electromagnetic

b)

mechanical

146.

Why does a banana look yellow?

a)

it reflects yellow wavelengths of light and absorbs most other wavelengths

b)

it absorbs yellow wavelengths of light and reflects most other wavelengths

147.

When you see the color black...

a)

All colors are reflecting

b)

All colors are absorbed

c)

The color blacl is reflecting

d)

the color black is absorbed

148.

Why does an apple look red?

a)

because it absorbs red light and reflects white light

b)

because it absorbs red light waves and reflects the others

c)

because it absorbs all colors of light

d)

because it reflects red light waves and absorbs the others

149.

White light is made up of all of the colors of the rainbow

a)

True

b)

False

150.

Black absorbs all light.

a)

True

b)

False

151.

What color is produced when mixing cyan, yellow, and magenta inks (pigments).

a)

White

b)

Black

c)

Blue

d)

Green

152.

What color of light do you get by combining red, green, and blue light?

a)

Black Light

b)

White Light

c)

Ultraviolet Light

d)

Infrared Light

153.
What are the three primary colors of light?
a)
Red, Green, Blue
b)
Green, Yellow, Blue
c)
Cyan, Magenta Yellow
d)
Cyan, Magenta, Black
154.
Light rays bend when they go from air to water  because of a change in ___________.
a)
color
b)
wavelength
c)
density
d)
speed
155.
This diagram best represents 
a)
reflection
b)
refraction
c)
absorption
d)
diffusion
156.
This color in the visible part of the spectrum has the highest energy.
a)
Blue
b)
Red
c)
Violet
d)
Yellow
157.
This color in the visible part of the spectrum has the lowest energy. 
a)
Blue
b)
Green
c)
Red
d)
Violet
158.

What causes the light to refract as it passes from air to water?

a)

a change in temperature of the light

b)

a change in illumination of the light

c)

a change in speed of the light

d)

a change in brightness of the light

159.

What does light travel fastest in?

a)

solid

b)

liqid

c)

gas

d)

vacuum

160.

What is happening to the red light?

a)

reflected

b)

absorbed

c)

refracted

161.

What is happening to every color but red?

a)

reflected

b)

absorbed

c)

refracted

162.

What happens to light as it passes from air to the window?

a)

Light changes speed but not direction

b)

all light is reflected

c)

all light passes through

d)

light changes speed and direction

163.

A leaf is green. What does this tell you about the light that is being absorbed?

a)

The light is a UV ray.

b)

The light is not a part of the light spectrum.

c)

All colors are reflected except green.

d)

All colors are absorbed except green

164.

What type of wavelengths do ultraviolet rays have?

a)

Short

b)

Long

c)

Alternating short and long

d)

None

165.

Which EM waves have the longest wavelength?

a)

radio

b)

x-rays

c)

ultraviolet

d)

gamma rays

166.

Which EM waves have the shortest wavelength?

a)

radio

b)

x-rays

c)

ultraviolet

d)

gamma rays

167.

Which EM waves are have the lowest frequency?

a)

radio

b)

none

c)

infrared

d)

x-rays

168.

Which EM waves are have the highest energy & are the most dangerous?

a)

radio

b)

gamma rays

c)

infrared

d)

x-rays

169.

Which color waves have the lowest frequency?

a)

red

b)

yellow

c)

green

d)

violet

170.

Which color waves have the shortest wavelength?

a)

red

b)

yellow

c)

green

d)

violet

171.

The picture below shows a ringing bell inside a vacuum jar. As air is pumped from the vacuum jar, the sound level of the ringing bell will decrease until it can no longer be heard.

This happens because air must be present in the jar in order for

a)

sound to be transferred

b)

electricity to flow through the wires

c)

the rubber to seal the jar

d)

the bell clanger to vibrate

172.

What type of electromagnetic wave has a higher frequency than visible light and a larger wavelength than x-rays

a)

Infrared

b)

Gamma

c)

visible

d)

Ultraviolet

173.

Electromagnet waves transfer ____________ without matter.

a)

information

b)

energy

c)

x rays

d)

medium

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