49782993 Revision Science Year 4

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TOPICAL EXERCISES YEAR 4

CHAPTER 1: INVESTIGATING LIVING THINGS

1. BASIC NEEDS

1.1 Human Have Basi Nee!s

1. The picture shows how humans lived in a cave along time ago. The cave is by a riverside and a cavelady is cooking for her family.

(a) Based on the picture, name the basic needs ofhumans.(i) ____________________ (ii) ____________________ (iii) ____________________

(b) hy does the family need to eat!(i) _____________________________

______ (ii) ___________________________________

(c) hy does the family need to stay in the cave! _______________________________________ _

(d) "ame one other basic need of human. _______________________________________ _

(e) #tate the importance of basic need in (d) tohumans. _______________________________________ _

1." Anima# Have Basi Nee!s

1. $ill in the blanks with the correct words.

(a) The rabbit in the picture will die eventually if itscondition were to be prolonged because it getsno _________ and __________.

(b) The mouse in the picture will die soon because itwill run out of _______ to _________.

(c) %nimal need shelter to protect themselves form __________, _________ and _________.

(d) "ame three animal shelters.(i) __________________ (ii) __________________ (iii) __________________

&. Two similar fish are each placed in two similar si'edauariums. The conditions of both the auariums aresimilar ecept that the auarium * is sprayed with alayer of oil as shown in the picture.

The fish in auarium P was found to be dead afterseveral days, whereas the fish in auarium Q wasfound to be alive and healthy.

(a) hat is the aim of the eperiment! _______________________________________

(b) +n the eperiment, state the following.(i) hat is being changed!

_________________________ (ii) hat has being measured!

_________________________ (iii) hat is kept the same!

_________________________ (c)hat can be concluded based on the eperiment!

_______________________________________

1.$ Anima# Have Basi Nee!s

1. The figure shows an eperiment carried out on fourplants.

The table shows the results obtained from theeperiment.

P#an% C&n!i%i&n a'%e( 1)ee*

C&n!i%i&n a'%e( ")ee*s

* $resh with greenleaves $resh with greenleaves

The plant wilts andhas yellow leaves

The plant dies

- The plant wilts and The plant dies



has yellow leaves

# The plant wilts andhas yellow leaves

The plant dies

(a) #tate what each of these plants is deprived of inthe eperiment.

(i) *lant ______________________________ (ii) *lant - ______________________________ (iii) *lant # ______________________________

(b) $or each of the following plants, draw aninference (reason) based on the observationobtain.

(i) *lant ______________________________ (ii) *lant - ______________________________ (iii) *lant # ______________________________

(c) hat can you conclude from the eperiment! ______________________________________

REVISION SCIENCE

YEAR 4

CHAPTER 1: INVESTIGATING LIVING THINGS

SECTION A

Every question is followed by four options A, B, C and D.Choose the correct answer.

1. hich of the following are basic needs of a human!

A P and R only C P , R and only

B P and only D P , Q, R and

&. hat do humans need to help them grow and stayhealthy!

A /at a balanced diet

B #top eercising regularly

C #leep at least 10 hours a day

D #tay outdoors in the rain to get enough water.

. hich of the following are natural shelters of animal!

J K

L M

A ! and " only C 2, " and # only

B " and # only D ! , " , # and $

3. +n which of these 4ars will the fish live in the longest!A C

B D

5. hich is the correct pathway of air duringinhalation!

A "ose→ indpipe→ 6ungsB 6ungs→ indpipe→ 7outh→ "ose

C 7outh→ "ose→ 6ungs→ indpipe

D indpipe → 6ungs→ "ose→ 7outh

8. Two basic needs of green plants, 9 and :, have thefollowing functions.

hich of the following are the basic needs % and & !

X Y

A ater #unlight

B ater %ir

C %ir #unlight

D #unlight ater

;. Two similar potted bean plants * and were usedin an investigation. <nly plant * was watered daily.The condition of the plants was observed daily.

hich of the following would most probably beobserved on the fourth day!

Plant P Plant Q

AThe stem is firm andupright with manymore green leaves.

The stem is firm andupright, with less greenleaves.

BThe stem is taller,firm and upright withlarger green.

The stem is limp(flaccid) and bent, withleaves that are curlingand turning yellow.

CThe stem is taller,firm and upright withlarger green leaves.

The stem is firm and

upright, with leavesthat are curling andturning yellow.

X : T& ma*e '&&!Y : T& +(even% %,e +#an%s '(&m !(-in &u%

/)i#%in0P Ai( R 2&&!Q

Ca( S

3a%e(





The animal is a

A $ish C Turtle

B *rawn D $rog

10. hich of these plants reproduced through spores!

A $erns C Bamboos

B Begonias D Bananas plant

1=. The picture shows a plant.

hich of the following plants reproduces in thesame way as the plant!

A <nion C Dibiscus

B Begonias D *ineapple

&?. hich of the following is not correct!

A #uckers

B Enderground stem

C #tem cutting

D #eeds

&1. The picture shows a plant that has responded to acertain stimulus.

hat stimulus has the plant that has responded to a

certain stimulus!

A ater C Cravity

B Touch D #unlight

&&. hat do the roots of a plant respond to!

I #unlight

II Touch

III ater

IV Cravity

A + and ++ only C ++ and +F only

B + and +++ only D +++ and +F only

&. #ome animals pretend to be dead to escape fromenemies. hich of these animals behaves in suchway!

A Aow C Beetle

B Dorse D Arocodile

&3. The picture shows an animal.

hich of these animals protects itself the same wayas the animal in the picture!

A $rog C /lephant

B Dorse D Ahameleon

&5. hy do camels have humps!

A To cool their body in hot climate

• +ts lives on land and water

• +ts breath using its lungs when on land

• +ts oun use their ills to breath in water.



B To maintain their body temperature

C To store food to survive in the desert

D To withstand etreme temperature conditions

&8. The picture shows a group of birds flying from oneplaced to another.

hy do the birds move from one place to anotherevery year!

A To escape of a cold winter

B To look for fresh water

C To look for mate

D To lay their eggs&;. The pictures show two groups of animals.

P Q

Buffalo #ea 6ion

-hinoceros hale

G(&u+ P G(&u+ Q A allow in the mud Dave a thick fat layer

B Dave humps Dibernate

C Dide in safe places Dave a thick fur coat

D Dave a thick fur coat7igrate from one place toanother

&0. hich of the following helps cactus plant to protectitself from its enemies!

A Das late

B Das fine hairs

C Das many thorns

D *roduces poisonous substances

&=. Dow does the mimosa plant protect itself from itsenemies!

A ) and * only C * and + only

B ) and + only D E , ) , * and +

?. hich of the following characteristics do not helpthe plant to survive in places that are freuentlyblown by strong wind!

A Dave fleible stem

B Dave buttress roots

C Dave needleGlike leaves

D Dave thick succulent stems

E By having hairy leaves) By folding its leaflets* By having thorns+ *roducing poisonous substances

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49782993 Revision Science Year 4