How Does Light Help Us See Things? How Does Light … · 1 How Does Light Help Us See Things? ... In the diagram below, use arrows to draw the path of light that enables us to see

Name: Class: Date:

Light and Shadows

Consolidation Worksheet 1How Does Light Help Us See Things? How Does Light Travel? What Happens To Light When It Is Reflected? Answer the questions below.

a. When are we able to see things?

b. How are we able to see ourselves in the mirror? In the diagram below, use arrows to draw the path of light that enables us to see our own reflection.

c. What can you conclude about how light travels from your answer in ‘b’?

d. Name two ways mirrors are useful in daily life.

Mirror

© 2012 Alston Publishing House Pte Ltd Science SMART Teacher’s Guide Grade 5 341

Name: Class: Date:

Light and Shadows

Consolidation Worksheet 2How Are Shadows Formed? Ari and Tom are playing a game of shadow animals. Study the picture below and answer the questions that follow.

a. What are the three things that allow Ari and Tom to create the shadows?

1.

2.

3.

b. What would happen to the shadow animals if Ari were to move nearer to the wall while Tom moved further away from the wall?

c. What can you conclude from your answer in ‘b’?

342 © 2012 Alston Publishing House Pte LtdAdditional Teacher’s Resources

Name: Class: Date:

Light and Shadows

Consolidation Worksheet 3Why Can We See Through Some Objects But Not Others? / How Do We Measure the Intensity of Light? 1. Look at the pictures below and answer the questions that follow.

a. Rita shone a torchlight on items A, B and C. Which item would allow the most light to pass through? Why?

b. Which item would allow the least light to pass through? Why?

c. Which item would allow only some light to pass through? Why?

A B C

Name: Class: Date:

Light and Shadows

Consolidation Worksheet 2How Are Shadows Formed? Ari and Tom are playing a game of shadow animals. Study the picture below and answer the questions that follow.

a. What are the three things that allow Ari and Tom to create the shadows?

1.

2.

3.

b. What would happen to the shadow animals if Ari were to move nearer to the wall while Tom moved further away from the wall?

c. What can you conclude from your answer in ‘b’?


2. Study the table below and fill in the appropriate answers using the words in the box below. Each word can only be used once.

a. Rita would like to find out how much light passes through the objects above. What equipment can she use to measure the amount of light passing through?

b. What is the unit of measurement for light?

Opaque Clear plastic bag Glass panel

Metal doorCling film Translucent Frosted glass

Ceramic tile Shower curtain Cardboard

Transparent

Stained glass Aluminum foil


3. Unscramble the letters that make up the words found in Column A. Then complete the sentences in Column B by matching to the words in Column A.

We use to show clearly that light can be reflected.

A is a dark area that is formed when an object blocks the path of light.

Light travels in lines.

objects do not allow light to pass through.

We can see objects around us because these objects

light to our eyes.

Objects that allow most of the light to pass through them are .

is a form of energy that allows us to see.

When we look into a mirror, we see our own .

T T G A I H S R

R I R O R M S

P T N E R A R A N S T

W O H D A S

G A I M E

P O E A U Q

T E R F L E C

H I L T G

Column A Column B

2. Study the table below and fill in the appropriate answers using the words in the box below. Each word can only be used once.

a. Rita would like to find out how much light passes through the objects above. What equipment can she use to measure the amount of light passing through?

b. What is the unit of measurement for light?

Opaque Clear plastic bag Glass panel

Metal doorCling film Translucent Frosted glass

Ceramic tile Shower curtain Cardboard

Transparent

Stained glass Aluminum foil


Name: Class: Date:

Fun and Games

Light and Shadows

Mystery Shadow

Play this game with several friends in a semi-dark room. Prepare the set-up as shown below.

Your friends will hide behind a thin white curtain (you can use a thin white sheet) one at a time. You will not be able to see them but you can see their shadows on the white curtain when the light behind them is turned on.

Observe the shadows cast on the curtain and try to guess who they belong to.

Take turns to play the role of the person guessing.

The person who makes the most correct guesses wins the game!

Why are your friends able to cast their shadows on the curtain?


Name: Class: Date:

Fun and Games

Light and Shadows

Mystery Shadow

Play this game with several friends in a semi-dark room. Prepare the set-up as shown below.

Your friends will hide behind a thin white curtain (you can use a thin white sheet) one at a time. You will not be able to see them but you can see their shadows on the white curtain when the light behind them is turned on.

Observe the shadows cast on the curtain and try to guess who they belong to.

Take turns to play the role of the person guessing.

The person who makes the most correct guesses wins the game!

Why are your friends able to cast their shadows on the curtain?

Name: Class: Date:

Exam Practice

Light and Shadows

Tom has some opaque and transparent sheets. He used the sheets, a torch and a ball to prepare the set-up below.

a. Tom observed that the shadow of the ball was formed only on Sheet C. Based on his observation, fill in the table below with the words ‘opaque’, ‘transparent’ or ‘cannot tell’. [4 marks]

b. If all the sheets were opaque, on which sheet(s) would the shadow of the ball appear? [1 mark]

Process skills: Observing, Analysing, Inferring

Sheet Opaque/Transparent/Cannot tell

A

B

C

D

Hint:Will a shadow form on an opaque

sheet or a transparent sheet?

Sheet D

Sheet C

Sheet B

Sheet A


Ans

wer

s to

Add

ition

al T

each

er’s

Res

ourc

esA

nsw

ers

to A

dditi

onal

Tea

cher

’s R

esou

rces

Nam

e:

C

lass

:

Dat

e:

Lig

ht

and

Sh

ado

ws

Co

nso

lid

atio

n W

ork

shee

t 2H

ow

Are

Sha

dow

s Fo

rmed

? A

ri an

d To

m a

re p

layi

ng a

gam

e of

sha

dow

ani

mal

s. St

udy

the

pict

ure

belo

w a

nd

answ

er th

e qu

estio

ns th

at fo

llow

.

a.

Wha

t are

the

thre

e th

ings

that

allo

w A

ri an

d To

m to

cre

ate

the

shad

ows?

1.

2.

3.

b.

Wha

t wou

ld h

appe

n to

the

shad

ow a

nim

als

if A

ri w

ere

to m

ove

near

er to

the

wal

l whi

le T

om m

oved

furt

her

away

from

the

wal

l?

c.

Wha

t can

you

con

clud

e fr

om y

our

answ

er in

‘b’?

A lig

ht s

ourc

e

An

obje

ct to

blo

ck th

e pa

th o

f lig

ht

A s

urfa

ce o

r sc

reen

whe

re th

e sh

adow

of a

n ob

ject

can

app

ear

Ari’

s sh

adow

ani

mal

wou

ld a

ppea

r sm

alle

r w

hile

Tom

’s sh

adow

ani

mal

wou

ld

appe

ar la

rger

.

Cha

ngin

g th

e di

stan

ce b

etw

een

the

scre

en a

nd a

n ob

ject

can

aff

ect t

he s

ize o

f

the

shad

ow c

ast.

(Acc

ept a

ll pos

sible

ans

wer

s.)

Nam

e:

C

lass

:

Dat

e:

Lig

ht

and

Sh

ado

ws

Co

nso

lid

atio

n W

ork

shee

t 1H

ow

Does

Lig

ht

Hel

p U

s Se

e Th

ing

s?

How

Does

Lig

ht

Tra

vel?

W

ha

t H

ap

pen

s To

Lig

ht

When

It

Is R

eflec

ted

? A

nsw

er th

e qu

estio

ns b

elow

.

a.

Whe

n ar

e w

e ab

le to

see

thin

gs?

b.

How

are

we

able

to s

ee o

urse

lves

in th

e m

irror

? In

the

diag

ram

bel

ow, u

se

arro

ws

to d

raw

the

path

of l

ight

that

ena

bles

us

to s

ee o

ur o

wn

refle

ctio

n.

c.

Wha

t can

you

con

clud

e ab

out h

ow li

ght t

rave

ls fr

om y

our

answ

er in

‘b’?

d.

Nam

e tw

o w

ays

mirr

ors

are

usef

ul in

dai

ly li

fe.

Mirr

or

Whe

n th

e th

ings

aro

und

us r

efle

ct li

ght i

nto

our

eyes

.

Light

trav

els

in a

str

aigh

t lin

e. /

The

pat

h of

ligh

t cha

nges

dire

ctio

n w

hen

refle

cted

off

a s

urfa

ce s

uch

as a

mirr

or o

r ot

her

obje

ct.

1. A

llow

s driv

ers t

o se

e th

e sid

e an

d be

hind

to c

heck

for

onco

min

g ca

rs w

hile

driv

ing.

2. A

llow

s us t

o gr

oom

our

selve

s in

the

mirr

or.

(Acc

ept a

ll pos

sible

ans

wer

s.)


Ch

ap

ter 5

Ans

wer

s to

Add

ition

al T

each

er’s

Res

ourc

esA

nsw

ers

to A

dditi

onal

Tea

cher

’s R

esou

rces

2.

Stud

y th

e ta

ble

belo

w a

nd fi

ll in

the

appr

opria

te a

nsw

ers

usin

g th

e w

ords

in

the

box

belo

w. E

ach

wor

d ca

n on

ly b

e us

ed o

nce.

a.

Ri

ta w

ould

like

to fi

nd o

ut h

ow m

uch

light

pas

ses

thro

ugh

the

obje

cts

abov

e. W

hat e

quip

men

t can

she

use

to m

easu

re th

e am

ount

of l

ight

pass

ing

thro

ugh?

b.

W

hat i

s th

e un

it of

mea

sure

men

t for

ligh

t?

Opa

que

Cle

ar p

last

ic b

agG

lass

pan

el Met

al d

oor

Clin

g fil

mTr

anslu

cent

Fros

ted

glas

s

Cer

amic

tile

Show

er c

urta

inC

ardb

oard

Tran

spar

ent

Stai

ned

glas

sA

lum

inum

foil

Tran

sluce

ntO

paqu

e

Fros

ted

glas

s

Show

er c

urta

in

Cer

amic

tile

Car

dboa

rd

Met

al d

oor

Cle

ar p

last

ic b

ag

Clin

g fil

m

Gla

ss p

anel

A d

ata

logg

er

Lux

Nam

e:

C

lass

:

Dat

e:

Lig

ht

and

Sh

ado

ws

Co

nso

lid

atio

n W

ork

shee

t 3W

hy C

an W

e Se

e Th

roug

h S

om

e O

bje

cts

B

ut

Not

Oth

ers?

/ H

ow

Do W

e M

easu

re

the

Inte

nsi

ty o

f Li

ght?

1.

Look

at t

he p

ictu

res

belo

w a

nd a

nsw

er th

e qu

estio

ns th

at fo

llow

.

a.

Rita

sho

ne a

torc

hlig

ht o

n ite

ms

A, B

and

C. W

hich

item

wou

ld a

llow

the

mos

t lig

ht to

pas

s th

roug

h? W

hy?

b.

Whi

ch it

em w

ould

allo

w th

e le

ast l

ight

to p

ass

thro

ugh?

Why

?

c.

Whi

ch it

em w

ould

allo

w o

nly

som

e lig

ht to

pas

s th

roug

h? W

hy?

AB

C

Item

C. I

tem

C is

tran

spar

ent,

thus

it a

llow

s m

ost l

ight

to p

ass

thro

ugh

easil

y.

Item

B. I

tem

B is

opa

que,

thus

it d

oes

not a

llow

light

to p

ass

thro

ugh.

Item

A. I

tem

A is

tran

sluce

nt, t

hus

it al

low

s on

ly s

ome

light

to p

ass

thro

ugh.


Lig

ht

an

d S

ha

do

ws

Ans

wer

s to

Add

ition

al T

each

er’s

Res

ourc

esA

nsw

ers

to A

dditi

onal

Tea

cher

’s R

esou

rces

Nam

e:

C

lass

:

Dat

e:

Fu

n a

nd

G

ames

Lig

ht

and

Sh

ado

ws

My

ster

y S

had

ow

Play

this

gam

e w

ith s

ever

al fr

iend

s in

a s

emi-d

ark

room

. Pre

pare

the

set-

up a

s sh

own

belo

w.

Your

frie

nds

will

hide

beh

ind

a th

in w

hite

cur

tain

(yo

u ca

n us

e a

thin

whi

te s

heet

) on

e at

a ti

me.

You

will

not b

e ab

le to

see

them

but

you

can

see

thei

r sh

adow

s on

th

e w

hite

cur

tain

whe

n th

e lig

ht b

ehin

d th

em is

turn

ed o

n.

Obs

erve

the

shad

ows

cast

on

the

curt

ain

and

try

to g

uess

who

they

bel

ong

to.

Take

turn

s to

pla

y th

e ro

le o

f the

per

son

gues

sing.

The

pers

on w

ho m

akes

the

mos

t cor

rect

gue

sses

win

s th

e ga

me!

Why

are

you

r fr

iend

s ab

le to

cas

t the

ir sh

adow

s on

the

curt

ain?

They

are

abl

e to

blo

ck th

e pa

th o

f lig

ht b

ehin

d th

em.

3.

Unsc

ram

ble

the

lette

rs th

at m

ake

up th

e w

ords

foun

d in

Col

umn

A. T

hen

com

plet

e th

e se

nten

ces

in C

olum

n B

by m

atch

ing

to th

e w

ords

in C

olum

n A

.

We

use

to s

how

cl

early

that

ligh

t can

be

refle

cted

.

A

is a

dar

k ar

ea th

at

is fo

rmed

whe

n an

obj

ect

bloc

ks th

e pa

th o

f lig

ht.

Light

trav

els

in

line

s.

obj

ects

do

not a

llow

lig

ht to

pas

s th

roug

h.

We

can

see

obje

cts

arou

nd

us b

ecau

se th

ese

obje

cts

ligh

t to

our

eyes

.

Obj

ects

that

allo

w m

ost o

f th

e lig

ht to

pas

s th

roug

h th

em a

re

.

is a

form

of e

nerg

y th

at a

llow

s us

to s

ee.

Whe

n w

e lo

ok in

to a

mirr

or,

we

see

our

own

.

T T

G A

I H

S R

R I

R O

R M

S

P T

N E

R A

R A

N S

T

W O

H D

A S

G A

I M

E

P O

E A

U Q

T E

R F

L E

C

H I

L T

G

C

olum

n A

C

olum

n B

STRA

IGHT

MIR

RORS

TRA

NSP

ARE

NT

SHA

DO

W

IMA

GE

OPA

QUE

REFL

ECT

LIG

HT


Ch

ap

ter 5

Ans

wer

s to

Add

ition

al T

each

er’s

Res

ourc

es

Nam

e:

C

lass

:

Dat

e:

Ex

am P

ract

ice

Lig

ht

and

Sh

ado

ws

Tom

has

som

e op

aque

and

tran

spar

ent s

heet

s. He

use

d th

e sh

eets

, a to

rch

and

a ba

ll to

pre

pare

the

set-

up b

elow

.

a.

Tom

obs

erve

d th

at th

e sh

adow

of t

he b

all w

as

form

ed o

nly

on S

heet

C. B

ased

on

his

obse

rvat

ion,

fil

l in

the

tabl

e be

low

with

the

wor

ds ‘o

paqu

e’,

‘tran

spar

ent’

or ‘c

anno

t tel

l’. [4

mar

ks]

b.

If a

ll th

e sh

eets

wer

e op

aque

, on

whi

ch s

heet

(s)

wou

ld th

e sh

adow

of t

he b

all

appe

ar?

[1 m

ark]

Pro

cess

sk

ills

: Obs

ervi

ng, A

naly

sing,

Inf

errin

g

Shee

tO

paqu

e/Tr

ansp

aren

t/Can

not t

ell

A B C D

Hin

t:W

ill a

shad

ow f

orm

on

an o

paqu

e sh

eet

or a

tra

nspa

rent

she

et?

Shee

t D

Shee

t C

Shee

t B

Shee

t A

Tran

spar

ent

Tran

spar

ent

Opa

que

Can

not t

ell

Shee

t A


Lig

ht

an

d S

ha

do

ws

Glossary

GlossaryChapter 5: Light and Shadows

Intensity of light The amount of light that is able to pass through a material

Lux The unit of measurement of light intensity

Opaque Does not allow light to pass through

Reflect The ability of light to bounce off an object

Reflection An image formed when an object is in front of a mirror or when light is reflected by a mirror

Translucent Allows only some light to pass through

Transparent Allows most light to pass through

352 © 2012 Alston Publishing House Pte Ltd

Ch

ap

ter 5

Documents

How Does Light Help Us See Things? How Does Light … · 1 How Does Light Help Us See Things? ... In the diagram below, use arrows to draw the path of light that enables us to see