What Is Sound? - Alston Publishing House – quality ... · PDF fileSound travels fastest...

Name: Class: Date:

Sound

Consolidation Worksheet 1What Is Sound?Rita hits a cymbal and it makes a loud sound.

a. State how the sound is produced.

b. Rita then holds the cymbal still. The sound stops. Explain why this is so.

c. Complete the statement below. When sound is made, something is .

390 © 2012 Alston Publishing House Pte LtdAdditional Teacher’s Resources

Name: Class: Date:

Sound

Consolidation Worksheet 2How Do We Hear?It takes time for sound to travel. The table below shows how fast sound travels through different materials.

Material Speed (m/s)

Air 330

Cement 3 000

Water 1 500

X 5 000

Y 1 400

a. Write down the states which air, water and cement are in.

Air: Water: Cement:

b. Based on the information given, what states do you think Material X and Material Y are in?

Material X: Material Y:

Name: Class: Date:

Sound

Consolidation Worksheet 1What Is Sound?Rita hits a cymbal and it makes a loud sound.

a. State how the sound is produced.

b. Rita then holds the cymbal still. The sound stops. Explain why this is so.

c. Complete the statement below. When sound is made, something is .

© 2012 Alston Publishing House Pte Ltd Science SMART Teacher’s Guide Grade 4 391

Name: Class: Date:

Sound

Consolidation Worksheet 3What Is Pitch of Sound?The pitch of a drum depends on its size and the tightness of its skin.

a. Tom has a drum. Suggest how he can:

i. increase its pitch. ii. increase its loudness.

b. Ari has a smaller drum than Tom. Will Ari’s drum produce a sound of lower or higher pitch than Tom’s drum?


1

3

4

2

5

6

7

8

9

10

Name: Class: Date:

Fun and Games

Sound

Crossword Puzzle!

Complete the crossword puzzle using the clues given below.

Name: Class: Date:

Sound

Consolidation Worksheet 3What Is Pitch of Sound?The pitch of a drum depends on its size and the tightness of its skin.

a. Tom has a drum. Suggest how he can:

i. increase its pitch. ii. increase its loudness.

b. Ari has a smaller drum than Tom. Will Ari’s drum produce a sound of lower or higher pitch than Tom’s drum?


Down:

1. The of sound can be measured using a sound level meter.

3. When adjusting the tightness of a string, we are changing its .

5. We can protect our ears from loud sounds by wearing ear .

7. is how high or low a sound is.

9. Sound cannot travel through empty space, also known as a .

Across:

2. Sound travels fastest through materials in the state.

4. The volume of sound is measured in the unit .

6. A long vibrating string will produce a pitch than a short

vibrating string.

8. Sound is created by .

10. In wind instruments, sound is produced by a vibrating column

of .


Name: Class: Date:

Exam Practice

Sound

Process skills: Observing, Contrasting, Predicting

The jal tarang is a musical instrument made of ceramic bowls of varying sizes filled with water. The musician uses wooden sticks to strike the edge of the bowls, producing music. The larger bowls produce sounds of a lower pitch, while the smaller bowls produce sounds of a higher pitch.

Study the picture below and answer the following questions.

a. If the level of water in all the bowls is the same, which bowl will produce the highest pitch — the smallest or the largest bowl? [1 mark]

b. Explain your answer in ‘a’. [2 marks]

Down:

1. The of sound can be measured using a sound level meter.

3. When adjusting the tightness of a string, we are changing its .

5. We can protect our ears from loud sounds by wearing ear .

7. is how high or low a sound is.

9. Sound cannot travel through empty space, also known as a .

Across:

2. Sound travels fastest through materials in the state.

4. The volume of sound is measured in the unit .

6. A long vibrating string will produce a pitch than a short

vibrating string.

8. Sound is created by .

10. In wind instruments, sound is produced by a vibrating column

of .


c. Predict what will happen to the pitch of the largest bowl if more water is poured into it. [1 mark]

d. Explain your answer in ‘c’. [2 marks]

Hint:How does the pitch of the musical instrument changewith the amount of air?


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c. Predict what will happen to the pitch of the largest bowl if more water is poured into it. [1 mark]

d. Explain your answer in ‘c’. [2 marks]

Hint:How does the pitch of the musical instrument changewith the amount of air?

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Sou

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1

3

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2

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size

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tight

ness

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kin.

a.

Tom

has

a d

rum

. Sug

gest

how

he

can:

i.

incr

ease

its

pitc

h.

ii.

incr

ease

its

loud

ness

.

b.

Ari

has

a sm

alle

r dr

um th

an T

om. W

ill A

ri’s

drum

pro

duce

a s

ound

of

low

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r hi

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pitc

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an T

om’s

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Ch

ap

ter 7

Ans

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each

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Res

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redi

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The

jal t

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a m

usic

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stru

men

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cer

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bow

ls of

var

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siz

es fi

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with

wat

er. T

he m

usic

ian

uses

woo

den

stic

ks to

str

ike th

e ed

ge

of th

e bo

wls,

pro

duci

ng m

usic

. The

larg

er b

owls

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uce

soun

ds o

f a

low

er p

itch,

whi

le th

e sm

alle

r bo

wls

prod

uce

soun

ds o

f a h

ighe

r pi

tch.

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y th

e pi

ctur

e be

low

and

ans

wer

the

follo

win

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estio

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a.

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e le

vel o

f wat

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all t

he b

owls

is th

e sa

me,

whi

ch b

owl w

ill pr

oduc

e th

e hi

ghes

t pitc

h —

the

smal

lest

or

the

larg

est b

owl?

[1 m

ark]

b.

Expl

ain

your

ans

wer

in ‘a

’.

[2 m

arks

]

The

smal

lest

bow

l.

If th

e le

vel o

f wat

er in

all

the

bow

ls is

the

sam

e, th

e sm

alle

st b

owl

will

cont

ain

the

leas

t am

ount

of a

ir. [1

mar

k] T

hus,

the

pitc

h w

ill be

the

high

est.

[1 m

ark]

Dow

n:

1. Th

e o

f sou

nd c

an b

e m

easu

red

usin

g a

soun

d le

vel m

eter

.

3.

Whe

n ad

just

ing

the

tight

ness

of a

str

ing,

we

are

chan

ging

its

.

5.

We

can

prot

ect o

ur e

ars

from

loud

sou

nds

by w

earin

g ea

r .

7.

is h

ow h

igh

or lo

w a

sou

nd is

.

9.

Soun

d ca

nnot

trav

el th

roug

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pty

spac

e, a

lso k

now

n as

a

.

Acr

oss:

2.

Soun

d tr

avel

s fa

stes

t thr

ough

mat

eria

ls in

the

sta

te.

4.

The

volu

me

of s

ound

is m

easu

red

in th

e un

it .

6.

A lo

ng v

ibra

ting

strin

g w

ill pr

oduc

e a

pitc

h th

an a

sho

rt

vibr

atin

g st

ring.

8.

Soun

d is

crea

ted

by

.

10.

In w

ind

inst

rum

ents

, sou

nd is

pro

duce

d by

a v

ibra

ting

colu

mn

of

.


Sou

nd

Ans

wer

s to

Add

ition

al T

each

er’s

Res

ourc

es

c.

Pred

ict w

hat w

ill ha

ppen

to th

e pi

tch

of th

e la

rges

t bow

l if m

ore

w

ater

is p

oure

d in

to it

. [1

mar

k] d.

Ex

plai

n yo

ur a

nsw

er in

‘c’.

[2

mar

ks]

Hin

t:H

ow d

oes

the

pitc

h of

the

m

usic

al in

stru

men

t ch

ange

with

the

am

ount

of

air?

The

pitc

h w

ill be

com

e hi

gher

.

If m

ore

wat

er is

pou

red

into

the

bow

l, th

e

amou

nt o

f air

will

be r

educ

ed. I

f les

s ai

r

vibr

ates

, the

pitc

h w

ill be

com

e hi

gher

.


Ch

ap

ter 7

GlossaryChapter 7: Sound

Absorb To take in

Decibel The unit of measurement for loudness of sound

Length The longest extent of something that is measured from one end to the other

Loudness The volume or intensity of sound

Pitch How high or low a sound is

Tension How tightly something is stretched

Thickness The measurement of distance between two surfaces of an object

Vibration A rapid side-to-side or back-and-forth movement

Volume The amount of space occupied by something


Sou

nd

What Is Sound? - Alston Publishing House – quality ... · PDF fileSound travels fastest...

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