Section A (28 x 2 = 56 marks) For each question from 1 to 28, four options are given. One of them is the correct answer. Make your choice (1, 2, 3 or 4). Shade the correct oval (1, 2, 3 or 4) on the Optical Answer Sheet. 1. Which one of the following observations is matched correctly to the characteristic

of living things? Observation Characteristic (1) A chicken lays eggs. Living things can grow. (2) A tadpole turns into a frog. Living things can reproduce. (3) A flying squirrel glides between

trees. Living things need air, food and water.

(4) A boy slaps a mosquito on his arm but it flies away.

Living things can respond to changes.

2. Study the diagram below.

Which of the following animals have a life cycle similar to the above? A: Butterfly B: Cockroach C: Grasshopper D: Mealworm beetle (1) A and B only (2) B and C only (3) C and D only (4) A, C and D only

egg

adult nymph

2

3. Li Ming carried out an experiment with a flower of a plant as shown below.

The flower did not produce any seeds after she removed one part of it. Which

part of the flower, A, B, C or D, did Li Ming remove? (1) A (2) B (3) C (4) D 4. The diagram below shows the fruits, X and Y, of two plants.

How is each fruit, X and Y, dispersed? X Y (1) Wind Animals (2) Wind Splitting action (3) Animals Splitting action (4) Animals Animals

hooks

soft hair

X Y

D

C

B A

3

5. The diagram below shows the processes in the life cycle of a flowering plant.

Which one of the following represents the missing processes E, F and G? E F G (1) Fertilisation Seed Dispersal Pollination (2) Seed Dispersal Pollination Fertilisation (3) Pollination Fertilisation Seed Dispersal (4) Seed Dispersal Fertilisation Pollination 6. The arrow in each of the diagrams below shows the transfer of pollen grains

between two flowers. Which of the following shows how pollination takes place between the two flowers correctly?

(1)

(2)

(3)

(4)

E

F Germination

G

D

4

7. Heredity is the passing down of characteristics from parents to their young. Which of the following statements about heredity are true?

A: The young can inherit traits from both parents. B: A female parent cannot pass her traits to a male child. C: Heredity helps one to know of one’s family health history. D: Inherited traits sometimes do not show in one generation but may reappear

in the next generation. (1) A and D only (2) B and C only (3) A, C and D only (4) B, C and D only 8. Study the classification table below. Organ Systems P Q R Heart

Rib cage Blood vessels

Nose Lungs

Windpipe

Skull Spine

Which one of the following parts of the body is wrongly matched to the organ

systems, P, Q and R? (1) Lungs (2) Rib cage (3) Windpipe (4) Blood vessels

5

9. Rafiq and his group members made a model of the human respiratory system with four main parts using the objects as shown below.

Match parts A, B, C and D correctly to the parts of the respiratory system. Parts A B C D (1) chest air tubes lungs muscle (2) chest lungs air tubes muscle (3) muscle air tubes lungs chest (4) muscle lungs air tubes chest

string

Part B

plastic bottle

Part A

Part C balloons

opening rubber sheet

open base

tape

drinking straws

cap with a hole on top

Part D

6

10. Farah placed four plants of the same type in identical jars, each containing water at the same level as shown below. She then placed the four set-ups, M, N, P and Q, next to the window for an hour.

At the end of the experiment, Farah measured the height of water, h, in each jar. Which of the following shows correctly the height of the water in each of the above

set-ups? Height of water

in Set-up M (mm)

Height of water in Set-up N

(mm)

Height of water in Set-up P

(mm)

Height of water in Set-up Q

(mm)

(1) 180 185 200 190 (2) 185 180 190 200 (3) 190 185 200 180 (4) 200 190 180 185

Set-up M Set-up N Set-up P Set-up Q

h

roots wrapped in plastic bag

water

layer of oil layer of oil

water

7

11. Mariya watered a potted plant and placed it into a black plastic bag. She tied the bag with a string and placed it in the field from 3 p.m. to 9 p.m..

Which of the following graphs shows correctly the changes in the amount of

oxygen and carbon dioxide in the bag during that period of time? (1)

(2)

(3)

(4)

carbon dioxide

oxygen

carbon dioxide

oxygen

carbon dioxide

oxygen carbon dioxide

oxygen

Time Time

Time

Am

ount

of g

as

Time

Am

ount

of g

as

Am

ount

of g

as

Am

ount

of g

as

string

black plastic bag

potted plant

8

S

T U V

S T

U V

T U V U

S

V

T S

12. The diagram below shows the parts, S, T, U and V, of the digestive system of a human body.

A man ate peanut porridge at six o’clock in the morning on an empty stomach.

Which of the following graphs most likely shows the correct amount of undigested food left in each part of his digestive system after five hours?

(1)

Parts of digestive system

Am

ount

of

undi

gest

ed fo

od

(g)

(2)

Parts of digestive system

Am

ount

of

undi

gest

ed fo

od(g

)

(3)

Parts of digestive system

Am

ount

of

undi

gest

ed fo

od

(g)

(4)

Parts of digestive system

Am

ount

of

undi

gest

ed fo

od

(g)

A

T

S

V U

9

13. The set-up below is to find out the amount of coloured water that can be absorbed by four similar-sized strips of different materials, W, X, Y and Z. After ten minutes, the strips absorb water to different levels as shown in the diagram below.

Which one of the materials is most suitable for making a bath towel?

(1) W (2) X (3) Y (4) Z

bath towel

coloured water

ruler

clamp

W X Z Y

10

14. An experiment was carried out as shown in the diagram below to test the strength of a material. Three 100 g weights were stacked on the material, one at a time, until it broke.

What change could be made so that the material can withstand heavier weights before breaking?

(1) Decrease the span of the pillars. (2) Increase the height of the pillars. (3) Increase the length of the material. (4) Decrease the mass of each weight. 15. James brings a magnet near a metal ball and observes the following.

What can he conclude about the metal ball? A: It is a magnet. B: It is made of a non-magnetic material. C: It is made of a magnetic material. D: It is not a magnet. (1) A and B only (2) A and C only (3) B and D only (4) C and D only

metal ball

magnet

the ball rolls away

material 100g weight

pillar span

100 g

100 g

100 g

weights weights

11

16.

A paper clip is moved towards a bar magnet slowly. The distance at which the paper clip is attracted to the bar magnet is measured. Then the bar magnet is replaced with another bar magnet of a different size and the process is repeated. The results are recorded in the table below.

Bar magnet Distance (cm)

3

2

1

3

4

What can be concluded from the experiment as shown above? (1) The shortest magnet has the least magnetic strength. (2) The biggest magnet has the strongest magnetic strength. (3) The size of a magnet does not affect its magnetic strength. (4) The longer the distance at which the paper clip is attracted by the magnet,

the weaker the magnetic strength of the magnet.

distance

bar magnet

paper clip distance

D

E

F

G

H

12

17. Mr Chen is conducting an experiment to make an electromagnet using electricity. The diagram below shows how the set-up looks like midway through the experiment.

How can Mr Chen increase the magnetic strength of the electromagnet? (1) Use a shorter steel ruler. (2) Add a switch to the circuit. (3) Add more coils around the steel ruler. (4) Use a copper ruler instead of the steel ruler. 18. Priya had three identical containers, A, B and C, in her room. The room

temperature was 28°C. She poured an equal amount of water into containers A and B as shown in the diagram below.

What would the temperature of water in container C be immediately after she

poured the water from both containers A and B into container C? (1) The temperature of water in container C would be 85°C. (2) The temperature of water in container C would be higher than 85°C. (3) The temperature of water in container C would be higher than 5°C but lower

than 85°C. (4) The temperature of water in container C would be at the same temperature

as the room.

wire

battery

steel ruler

Container A Temperature of water: 5°C

Container B Temperature of water: 85°C

Container C

water

13

19. Mei Ling found two glasses, X and Y, stuck together as shown in the diagram below. The two glasses were not easily separated.

What could she do to separate the two glasses? (1) Pour hot water into glass X and put glass Y in hot water. (2) Pour cold water into glass X and put glass Y in hot water. (3) Pour hot water into glass X and put glass Y in cold water. (4) Pour cold water into glass X and put glass Y in cold water. 20. Jayden shines the torch on a wooden cone as shown in the diagram below.

Which one of the following is likely to be the shadow that Jayden will observe on

the white screen? (1)

(2)

(3)

(4)

glass X

glass Y

lit torch

wooden cone white screen

table top

14

21. The diagram below shows the glass panes of a window.

We can see the trees on the other side of the glass panes because

______________________________. A: light from the sun enters our eyes B: the glass panes reflect all the light C: light that falls on the trees is reflected into our eyes D: glass allows most of the light that falls on it to pass through (1) A and B only (2) B and C only

(3) B and D only (4) C and D only

22. Noreen drew a diagram showing the water cycle as shown below in her Science

Journal.

Which one of the following is correct? Evaporation occurred at Condensation occurred at (1) P Q (2) P R (3) Q R (4) R Q

P

Q R Water vapour

Water body Cloud

Rain

window

glass pane

15

23. Study the flowchart below.

Which of the following items best represent A, B, C and D respectively in the

flowchart above? A B C D (1) milk brick wind music (2) wind shadow brick milk (3) music milk wind brick (4) shadow wind milk brick

No

Yes Yes Yes

Yes

No No

Matter

Does it have a definite shape?

Can it be compressed?

B

A

C

D Does it have a

definite volume?

16

24. Clarisse conducted an experiment to find out if the temperature of water affects the rate of evaporation. She recorded the conditions in the table below.

Set-up

Exposed surface

area of water (cm2)

Temperature of water

(oC)

Amount of water (mℓ)

D 40 80 250 E 60 50 250 F 40 40 300 G 50 50 300 H 60 80 250 Which pair of set-ups shown in the table above could she use to compare in

order to form a conclusion? (1) D and E (2) E and H (3) F and G (4) F and H 25. Anna made two different shapes, one at a time, using the same play dough.

She measured the mass and volume of each shape. She recorded her results in

a table. Which of the following shows the correct results? (1)

Shape of play

dough Mass

(g) Volume

(cm3)

Ball 48 18 Cake 68 48

(2)

Shape of play

dough Mass

(g) Volume

(cm3)

Ball 48 18 Cake 48 28

(3)

Shape of play

dough Mass

(g) Volume

(cm3)

Ball 48 18 Cake 48 18

(4)

Shape of play

dough Mass

(g) Volume

(cm3)

Ball 48 18 Cake 28 18

play dough

Mass: 48 g Volume: 18 cm3

17

26. Mdm Nuraini conducted an experiment using four identical mirrors and four identical containers with the same amount of water of different temperatures. She set up the apparatus as shown below to observe condensation taking place in a room with a constant temperature of 28°C.

In which set-up, A, B, C or D, would the greatest number of water droplets be

seen on the surface of mirror which is facing the container of water after two minutes?

(1) Set-up A (2) Set-up B (3) Set-up C (4) Set-up D 27. Colin soaked four similar T-shirts, Q, R, S and T, in a basin of water. Each

T-shirt was soaked with an equal amount of water. He then arranged the T-shirts on a table as shown in the diagram below.

What measurement should Colin take in order to find out how the size of the

exposed surface area affects the rate of evaporation of water? (1) Temperature of the surrounding air. (2) Temperature of each T-shirt after five hours. (3) Difference in mass of the T-shirts after five hours. (4) Difference in the size of the exposed surface area of the T-shirts.

50°C 30°C

Q R S T table

90°C 70°C

mirror mirror mirror

Set-up D Set-up C Set-up A Set-up B

mirror

18

28. Mrs Tay filled a kettle with tap water and started to boil it on an electric stove. After a few minutes, the water started to boil. The water continued to boil for a few minutes before she turned off the electric stove. She waited for a while before pouring the water into a thermal flask to keep it hot. The graph below represents the change in the temperature of the water over a period of time.

Based on the graph above, which one of the following correctly describes the

cause of the changes in the temperature of the water? From A to B From B to C From C to D

(1) Heat gain Heat gain Heat loss

(2) Heat gain No heat gain and loss Heat loss

(3) Heat loss Heat gain Heat gain

(4) Heat loss No heat gain and loss Heat gain

0 Time (min)

Tem

pera

ture

of w

ater

(°

C)

A

D

B C