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Worksheets

Year 9 Waves

Total questions: 35

Worksheet time: 19mins

Name
Class
Date
1.

P4.2 Frequency is measured in _______.

a)

Hertz (Hz)

b)

Meters per second (m/s)

c)

Meters (m)

d)

Decibels (Db)

2.

P4.2 Which wave in the diagram has the greatest frequency?

a)

1

b)

2

c)

3

d)

4

3.

P4.3 What two parts make up a longitudinal wave?

a)
Compressions and rarefactions
b)
Crests and troughs
c)
Compressions and crests
d)
Rarefactions and troughs
4.

P4.3 Sound travels fastest in...

a)

Solids

b)

Liquids

c)

Gases

d)

Air

5.

P4.2 The volume of a sound is measured in units called ________

a)

Decibels (Db)

b)

Litres (L)

c)

Hertz (Hz)

d)

Amps (A)

6.

P4.3 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.
7.

P4.4 Why do we see lightning before we hear the thunder?

a)
Our eyes trick us
b)

Light travels faster than sound in air

c)

Lightning and thunder are different things

d)

We see lightning and hear thunder at the same time

8.

P4.1 What do waves transfer?

a)

Just matter

b)

Just energy

c)

Energy and matter

d)

Neither energy nor matter

9.

P4.8 A camera's aperture is similar to the _______ in the human eye

a)

Ciliary muscles

b)

Pupil

c)

Iris

d)

Retina

10.

P4.8 What part of the human eye focuses light?

a)

Pupil

b)

Retina

c)

Iris

d)

Lens

11.

P4.10 What happens when white light hits a green shirt?

a)

Green light is reflected, all other colours are absorbed

b)

Green light is absorbed, all other colours are reflected

c)

White light is absorbed

d)

White light is reflected

12.

P4.6 Sound with frequency too high for a human to hear is called?

a)

Ultrasound

b)

Echolocation

c)

Kilosound

d)

Infrasound

13.

P4.6 Infrasound has a frequency less than _____

a)

2Hz

b)

20Hz

c)

200Hz

d)

2,000Hz

14.

P4.9 A wave with an amplitude of 1 meets a wave with an amplitude of 2. What is the amplitude of the superimposed wave?

a)

1.5

b)

2

c)

3

d)

1

15.

P4.5 A spoon looks bent in a glass of water because of ________

a)

Reflection

b)

Dispersion

c)

Refraction

d)

Superposition

16.

P4.7 What is the purpose of the diaphragm in a speaker?

a)

Stop the speaker from popping

b)

Vibrate to form sound waves

c)

Receive electrical signals

d)

Convert electrical signals

17.

P4.7 Which of these is not an advantage of using ultrasound scanners?

a)

Does not cause radiation damage

b)

Live images are formed

c)

More detailed images than X-ray imaging

d)

Is cheaper than most other forms of imaging

18.

P4.9 Two waves superimpose, each with an amplitude of 1. What is the amplitude when a peak meets a trough?

a)

1

b)

0

c)

2

d)

-2

19.

P4.5 When light moves from air to glass, the speed of light ________

a)

decreases

b)

increases

c)

stays the same

d)

equals zero

20.

P4.10 A surface is black if _________

a)

Black light is reflected

b)

All light is absorbed

c)

Black light is absorbed

d)

White light is reflected

21.

P4.5 What colour has the highest frequency?

a)

Red

b)

White

c)

Blue

d)

Violet

22.

P4.4 What piece of apparatus is not needed to measure the speed of sound?

a)

Clapper

b)

Stopwatch

c)

Tape measure

d)

Mirror

23.

P4.1 How would a ping pong ball move on a water wave?

a)

Up and down

b)

Left and right

c)

Up and down with some side movement

d)

Not at all

24.

P4.5 What is the name to an object/image if seen in a mirror?

a)

Reflected image

b)

Refracted image

c)

Virtual image

d)

Implicit image

25.

P4.7 Why do bats use ultrasound? Select two

a)

To help locate objects around them

b)

To clean other bats

c)

To break up rocks to land on

d)

For some communication

26.

P4.2 Which wave in the diagram has the longest wavelength?

a)
1
b)
2
c)
3
d)
4
27.

P4.5 What is a line drawn at 90° to a boundary called?

a)

incident ray

b)

normal line

c)

refracted ray

d)

tangent

28.

P4.5 Which color of light is most refracted during dispersion by a prism?

a)
red
b)
yellow
c)
green
d)
violet
29.

P4.10 What happens to white light that undergoes diffuse reflection?

a)

Reflected rays meet at one point

b)

The angle of reflection is the same as the angle of incidnence

c)

All light is absorbed

d)

Light is reflected in random directions

30.

P4.3 Which of these is an example of a transverse wave?

a)

Sound

b)

Earthquake

c)

X-ray

d)

Compressing a spring

31.

P4.8 What do the cones in the retina determine?

a)

Depth

b)

Size

c)

Brightness

d)

Colour

32.

P4.6 What is the definition of auditory range?

a)

The frequencies that can be produced by an animal

b)

The frequencies that can be heard by an animal

c)

The size of an animal's ear drum

d)

The length of the ear canal

33.

P4.5 What is the angle between A and N?

a)

30 degrees

b)

60 degrees

c)

90 degrees

d)

120 degrees

34.

P4.5 Angle i equals 35 degrees. According to the law of reflection, what will angle r equal?

a)

35 degrees

b)

10 degrees

c)

55 degrees

d)

17.5 degrees

35.

P4.3 What type of wave is pictured?

a)

Longitudinal wave

b)

Transverse wave

c)

Water wave

d)

Light wave

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