The Life Cycles of Animals - Alston Publishing · PDF fileThe Life Cycles of Animals Name:...
-
Upload
hoangquynh -
Category
Documents
-
view
218 -
download
4
Transcript of The Life Cycles of Animals - Alston Publishing · PDF fileThe Life Cycles of Animals Name:...
The Life Cycles of Animals
Name: Class: Date:
Consolidation Worksheet 1Why Do Animals Reproduce?Tick (ü) the boxes next to the statements that are TRUE.
1 Living things reproduce to ensure the continuity of their own kind.
2 A life cycle is made up of all the stages of an animal’s life.
3 All mammals give birth to their young alive.
4 Not all fishes lay eggs.
5 The life cycles of animals and the life cycles of plants are the same.
66 © 2012 Alston Publishing House Pte LtdAdditional Teacher’s Resources
The Life Cycles of Animals
Name: Class: Date:
Consolidation Worksheet 2What Are the Life Cycles of Some Animals?Complete the flowchart below by filling in the missing words in the boxes. Use the words below to help you. Each word or words can be used only once.
Four stagesMealworm
CockroachLaying eggs
RabbitChicken
Ways of Reproduction
Giving birth to young alive
Three stages
such as
such as such as
Have life cycles with
• Frog
•
•
• Butterfly
• Mosquito
•
The Life Cycles of Animals
Name: Class: Date:
Consolidation Worksheet 1Why Do Animals Reproduce?Tick (ü) the boxes next to the statements that are TRUE.
1 Living things reproduce to ensure the continuity of their own kind.
2 A life cycle is made up of all the stages of an animal’s life.
3 All mammals give birth to their young alive.
4 Not all fishes lay eggs.
5 The life cycles of animals and the life cycles of plants are the same.
© 2012 Alston Publishing House Pte Ltd Science SMART Teacher’s Guide Grade 4 67
The Life Cycles of Animals
Name: Class: Date:
Consolidation Worksheet 3Why Do Young Grow Up to Look Like Their Parents? Which of the following characteristics can be inherited? Which of them cannot be inherited? Complete the flowchart below.
Characteristics
Can be inherited Cannot be inherited
Eye colour
Single or double eyelids
Nail length
Scars
Hair length
Dimples
68 © 2012 Alston Publishing House Pte LtdAdditional Teacher’s Resources
The Life Cycles of Animals
Name: Class: Date:
Fun and Games Can You Spot Them?
The young of some animals look like their parents, while the young of other animals do not. Spot the animals and their young. Circle each pair or group of adult animals and their young with a different colour.
The Life Cycles of Animals
Name: Class: Date:
Consolidation Worksheet 3Why Do Young Grow Up to Look Like Their Parents? Which of the following characteristics can be inherited? Which of them cannot be inherited? Complete the flowchart below.
Characteristics
Can be inherited Cannot be inherited
Eye colour
Single or double eyelids
Nail length
Scars
Hair length
Dimples
© 2012 Alston Publishing House Pte Ltd Science SMART Teacher’s Guide Grade 4 69
The Life Cycles of Animals
Name: Class: Date:
Exam PracticeProcess skills: Observing, Inferring
Tom visited a farm. He saw a hen sitting on its eggs.
a. Why did the hen sit on its eggs? [1 mark]
b. Tom knows that chicken eggs must be kept at a temperature of about 41 °C for 21 days for the chicks to develop. He built a simple machine as shown below to keep eggs warm. He bought three fertilised chicken eggs from the farm and placed them inside the machine. He observed the eggs for 21 days. However, after 21 days, the eggs did not hatch into chicks.
What could be the reason why the eggs did not hatch? [1 mark]
Air holesEgg
Lightbulb
Styrofoam box
Wire mesh
Bowl of water
Hint:How does the temperature affect how the chicks in
the eggs develop?
70 © 2012 Alston Publishing House Pte LtdAdditional Teacher’s Resources
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
Th
e L
ife
Cy
cles
of
An
imal
s
Nam
e:
C
lass
:
Dat
e:
Co
nso
lid
atio
n W
ork
shee
t 2W
ha
t A
re t
he
Life
Cycl
es o
f So
me
Anim
als
?C
ompl
ete
the
flow
char
t bel
ow b
y fil
ling
in th
e m
issin
g w
ords
in th
e bo
xes.
Use
the
wor
ds b
elow
to h
elp
you.
Eac
h w
ord
or w
ords
can
be
used
onl
y on
ce.
Four
sta
ges
Mea
lwor
mC
ockr
oach
Layi
ng e
ggs
Rabb
itC
hick
en
Way
s of
Rep
rodu
ctio
n
Giv
ing
birt
h to
yo
ung
aliv
e
Thre
e st
ages
such
as
such
as
such
as
Hav
e lif
e cy
cles
with
• F
rog
•
•
• B
utte
rfly
• M
osqu
ito
•
Layi
ng e
ggs
Rabb
itFo
ur s
tage
s
Chi
cken
Coc
kroa
chM
ealw
orm
Th
e L
ife
Cy
cles
of
An
imal
s
Nam
e:
C
lass
:
Dat
e:
Co
nso
lid
atio
n W
ork
shee
t 1W
hy D
o A
nim
als
Rep
rod
uce
?Ti
ck (ü
) th
e bo
xes
next
to th
e st
atem
ents
that
are
TRU
E.
1Liv
ing
thin
gs r
epro
duce
to e
nsur
e th
e co
ntin
uity
of t
heir
own
kind
.
2A
life
cyc
le is
mad
e up
of a
ll th
e st
ages
of a
n an
imal
’s lif
e.
3A
ll m
amm
als
give
birt
h to
thei
r yo
ung
aliv
e.
4N
ot a
ll fis
hes
lay
eggs
.
5Th
e lif
e cy
cles
of a
nim
als
and
the
life
cycl
es o
f pla
nts
are
the
sam
e.
✓ ✓ ✓
The Life Cycles of Animals
Name: Class: Date:
Exam PracticeProcess skills: Observing, Inferring
Tom visited a farm. He saw a hen sitting on its eggs.
a. Why did the hen sit on its eggs? [1 mark]
b. Tom knows that chicken eggs must be kept at a temperature of about 41 °C for 21 days for the chicks to develop. He built a simple machine as shown below to keep eggs warm. He bought three fertilised chicken eggs from the farm and placed them inside the machine. He observed the eggs for 21 days. However, after 21 days, the eggs did not hatch into chicks.
What could be the reason why the eggs did not hatch? [1 mark]
Air holesEgg
Lightbulb
Styrofoam box
Wire mesh
Bowl of water
Hint:How does the temperature affect how the chicks in
the eggs develop?
© 2012 Alston Publishing House Pte Ltd Science SMART Teacher’s Guide Grade 4 71
The
Life
Cyc
les
of
An
ima
ls
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
Th
e L
ife
Cy
cles
of
An
imal
s
Nam
e:
C
lass
:
Dat
e:
Fu
n a
nd
G
ames
Can
Yo
u S
po
t T
hem
?
The
youn
g of
som
e an
imal
s lo
ok li
ke th
eir
pare
nts,
whi
le th
e yo
ung
of
othe
r an
imal
s do
not
. Spo
t the
ani
mal
s an
d th
eir
youn
g. C
ircle
eac
h pa
ir or
gro
up o
f adu
lt an
imal
s an
d th
eir
youn
g w
ith a
diff
eren
t col
our.
Pupi
ls sh
ould
circ
le e
ach
pair
or g
roup
of a
dult
anim
als
and
thei
r yo
ung
with
a d
iffer
ent c
olou
r: fa
rmer
and
girl
; fro
g an
d ta
dpol
es; c
hick
en a
nd
chic
ks; c
ow a
nd c
alf;
butte
rfly
and
cat
erpi
llar.
Th
e L
ife
Cy
cles
of
An
imal
s
Nam
e:
C
lass
:
Dat
e:
Co
nso
lid
atio
n W
ork
shee
t 3W
hy D
o Y
oung
Gro
w U
p t
o L
ook
Lik
e Th
eir
Pa
rents
? W
hich
of t
he fo
llow
ing
char
acte
ristic
s ca
n be
inhe
rited
? W
hich
of t
hem
ca
nnot
be
inhe
rited
? C
ompl
ete
the
flow
char
t bel
ow.
Cha
ract
erist
ics
Can
be
inhe
rited
Can
not b
e in
herit
ed
Eye
colo
ur
Sing
le o
r do
uble
eye
lids
Nai
l len
gth
Scar
s
Hair
leng
th
Dim
ples
Eye
colo
urN
ail le
ngth
Sing
le o
r do
uble
eye
lids
Hair
leng
th
Dim
ples
Scar
s
72 © 2012 Alston Publishing House Pte LtdAdditional Teacher’s Resources
Ch
ap
ter 1
Ans
wer
s to
Add
ition
al T
each
er’s
Res
ourc
es
Th
e L
ife
Cy
cles
of
An
imal
s
Nam
e:
C
lass
:
Dat
e:
Ex
am P
ract
ice
Pro
cess
sk
ills
: Obs
ervi
ng, I
nfer
ring
Tom
visi
ted
a fa
rm. H
e sa
w a
hen
sitt
ing
on it
s eg
gs.
a.
Why
did
the
hen
sit o
n its
egg
s?
[1 m
ark]
b.
Tom
kno
ws
that
chi
cken
egg
s m
ust b
e ke
pt a
t a te
mpe
ratu
re o
f ab
out 4
1 °C
for
21 d
ays
for
the
chic
ks to
dev
elop
. He
built
a s
impl
e m
achi
ne a
s sh
own
belo
w to
kee
p eg
gs w
arm
. He
boug
ht th
ree
fert
ilised
chi
cken
egg
s fr
om th
e fa
rm a
nd p
lace
d th
em in
side
the
mac
hine
. He
obse
rved
the
eggs
for
21 d
ays.
How
ever
, afte
r 21
day
s, th
e eg
gs d
id n
ot h
atch
into
chi
cks.
W
hat c
ould
be
the
reas
on w
hy th
e eg
gs
di
d no
t hat
ch?
[1 m
ark]
Air
hole
sEg
g
Light
bulb
Styr
ofoa
m b
ox
Wire
mes
h
Bow
l of w
ater
Hin
t:H
ow d
oes
the
tem
pera
ture
af
fect
how
the
chi
cks
in
the
eggs
dev
elop
?
To p
rovi
de w
arm
th fo
r th
e ch
icks
insid
e
the
eggs
to d
evel
op.
The
mac
hine
did
not
pro
vide
eno
ugh
war
mth
for
the
chic
ks in
side
the
eggs
to d
evel
op.
© 2012 Alston Publishing House Pte Ltd Science SMART Teacher’s Guide Grade 4 73
The
Life
Cyc
les
of
An
ima
ls
Glossary
GlossaryChapter 1: The Life Cycles of Animals
Cocoon The protective casing which some insects make for themselves while they grow in their pupal stage
Gene Thepartofthecellthatcontrolsorinfluencesthephysicalcharacteristics of a living thing, and can be passed down from parents to their young
Heredity The passing down of traits from parent to child
Larva (plural: larvae) The newly hatched young of an insect that is wingless and worm-like
Life cycle The stages through which a living thing goes through in its life, from the beginning of its life, to undergoing changes, reaching maturity as well as reproduction
Metamorphosis A great change in appearance in some animals when they become an adult
Moult Shed the old skin or covering and replace it with new growth so that the body can grow bigger
Nymph The young insect that looks almost like the adult except that it is smaller and has no wings
Pupa The stage of development between larva and adult, during which the larva does not eat and undergoes complete transformation within a cocoon
Trait A characteristic or condition
74 © 2012 Alston Publishing House Pte Ltd
Ch
ap
ter 1