PL RS P6L15_16 Review 1 WS

Primary 6

Rocket Science

Name _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __
Tutor
Topic _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __
REVIEW 1 (LESSON 15/16)

REVIEW 1 (LESSON 15/16)

Primary 6: Rocket Science

Lesson Outline
• SectionA: Multiple Choice Questions (56 marks)
• Section B: Open-ended Questions (44 marks)

2

Primary 6: Rocket Science

1. Felix studied samples of food as it passed through five parts, A, B, C, D and E, of the
human digestive system, as shown below.

A
B
C

ED

Amount of P
undigested food Q
R
A
S

BC D E

Which line in the graph above best represents the relative amount of undigested food in
the different parts of the digestive system?

(1) P
(2) Q

(3) R
(4) S

()

3

Primary 6: Rocket Science

2. Allan wanted to find out if the growth of a plant is affected by drought or flood.

Which of the following shows correctly the variables that should be changed and
measured in his experiment?

Number of set-up Variable changed Variable measured
(1) 1 amount of water height of plant
(2) 1 amount of sunlight
(3) 3 amount of sunlight number of leaves
(4) 3 amount of water height of plant

number of leaves

()

3. Which organ(s) of the human respiratory system is/are protected by the ribcage?

ribcage

lungs heart windpipe gullet
(1)
(2) ()
(3)
(4)

4

Primary 6: Rocket Science

4. Anna was given four bags with the characteristics as indicated in the table below.

Bag flexible absorbs strong
water

A√ √

B √√

C √ √√

D √√

Based on the information given, which bag should Anna choose if she is going to the
beach and wants to keep her things dry?

(1) A
(2) B

(3) C
(4) D

()

5. In an amusement park, people drive bumper cars and try to bump one another at part X
as shown in the diagram below,

X )
What are the important properties of the material used to make part X?
5
(1) flexible and strong
(2) waterproof and strong
(3) flexible and transparent
(4) waterproof and transparent

(

Primary 6: Rocket Science

6. Fiona bought two similar potted plants. She kept one plant under the sun and the
other in the shade.
A few months later, Fiona noted that the two plants looked different as shown in the
diagrams below.

plant grown in the shade plant grown in sunlight

Which one of the following is correct for the plant grown in the shade?

Observation Reason
(1) had more leaves to make more food
(2) had longer stem to support more leaves
(3) had leaves that were well-spread out to get maximum sunlight
(4) had thicker stem to transport more food and water

()

6

Primary 6: Rocket Science

7. Study the diagram below.
Life Cycle of an animal

Has pupa stage Does not have pupa stage

Young Young Young Young
looks does not looks does not
like look like like look like
adult adult
adult adult
J L
K M

Jasmine found an insect X on the ground. Its life cycle was as shown below.

Which of the following letters in the diagram would represent insect X? ( )
(1) J
(2) K
(3) L
(4) M

7

Primary 6: Rocket Science

8. James filled three similar beakers, X, Y and Z, with different amounts of water as seen in
the diagram below. The temperature of water in all the beakers was 85°C. He placed an
egg into each beaker and recorded how fast the eggs were cooked.

Beaker X Beaker Y Beaker Z

What is the aim of James’ experiment?

(1) To find out if heat energy is necessary to cook an egg
(2) To find out how the temperature changes in each beaker
(3) To find out how quickly heat is lost to the environment in each beaker
(4) To find out if water with the same temperature has same amount of heat energy

regardless of their volume of water

()

9. Substance A has a freezing point of 15°C and boiling point of 150°C. At which of the
following temperatures will substance A be in the liquid state?

(1) 0°C
(2) 10°C
(3) 100°C
(4) 150°C

()

8

Primary 6: Rocket Science

10. A metal trough was filled with boiling water and rod made of different materials were
inserted into its side as shown below.

boiling water

Rod A metal trough
Rod B
Rod C
Rod D

rod coated with wax

All the rods are of the same size. He then coats all the rods totally with the same
amount of wax.

The graph below shows the length of wax that has melted on each rod at the end of the
experiment.

Length of
wax

melted
(cm)

A B CD Rod

Which of the rods is made of material that is the most suitable for making the base of a
frying pan?

(1) Rod A
(2) Rod B

(3) Rod C
(4) Rod D

()

9

Primary 6: Rocket Science
11. The diagrams below show the different stages of the water cycle.

AB

C DE

Arrange the stages of the water cycle in the correct order

(1) B, A, C, E, D
(2) B, A, E, C, D
(3) B, D, E,A, C
(4) B, D, E, C, A

()

10

Primary 6: Rocket Science
12. Which of the following set-ups will have the dimmest bulbs?

(1) (2)
(3) (4)

()

11

Primary 6: Rocket Science

13. Study the circuit diagram below.

Switch A Switch B
Switch C

Battery

In which order must the switches be closed so that Bulb X lights up first, Bulb Z lights
up second and Bulb Y lights up third?

1st switch to close 2nd switch to close 3rd switch to close
(1) B C A
(2) C B A
(3) C A B
(4) B A C

( )

12

Primary 6: Rocket Science

14. Alicia placed a rectangular sheet Y and object X between a torch and a screen as shown
below.

shadow

torch X
Y

screen

Which of the following conclusions are correct?

Object Allows light to Does not allow Not possible to
pass through tell
light to pass
through

AX 

BY 

C screen 

(1) A and B only
(2) A and C only
(3) B and C only
(4) A, B and C

()

13

Primary 6: Rocket Science

15. Study the flow chart below.

Matter

Does it have a No
definite
volume? H

Yes No

Does it have a I
definite shape?

J

Which of the following correctly represents H, I and J?

H I J
(1) ice water water vapour
(2) water vapour ice
(3) ice water vapour water
(4) water vapour water water

ice )

(

14

Primary 6: Rocket Science

16. The diagrams below show four bar magnets, A, B, C and D. The ends of the magnets are
labelled R, T, U, V, W, X, Y and Z. The following observations are made when the magnets
are put near each other.

• Y repels T
• R repels X
• R attracts V

RT UV
Magnet A Magnet B

WX YZ
Magnet C Magnet D

Which of the following is correct? Repels
X and Z
Attracts R and Y
(1) R and W W and Z
(2) T and X V and Z
(3) U and Y
(4) V and X

()

15

Primary 6: Rocket Science

17. The diagram below shows the stages in the life cycle of a flowering plant.

A Adult plant B

Young plant Adult plant with fruit

Seedling D Seed C

Which of the following stages will pollination and fertilisation take place? ( )

(1) A
(2) B
(3) C
(4) D

18. John wanted to find out if the strength of wind would affect the distance travelled by Fruit X
when it was dropped from a height.

Which of the following variables should he keep the same so as to ensure that it would be
a fair test.

A: Location of the experiment.
B: Strength of wind blowing Fruit X.
C: Height from which Fruit X was dropped.
D: Distance travelled by Fruit X away from the starting point.

(1) A and C only
(2) B and D only
(3) C and D only
(4) A, B and C only

()

16

Primary 6: Rocket Science

19. The diagrams below show a plant cell. Diagram A shows the same plant cell when water
enters it. Diagram B shows the same plant cell when water leaves it.

a plant cell

water water
enters leaves

Based on the above information, which of the following is a correct observation of the cell
wall?

A: The cell wall is a protective structure.
B: The cell wall is a strong and stiff structure.
C: The cell wall supports and gives the cell a regular shape.
D: The cell wall controls the movement of water in and out of the cell.

(1) A and B only
(2) A and D only
(3) B and C only
(4) C and D only

()

17

Primary 6: Rocket Science

20. The diagram below shows how blood is circulated in our body.
Upper body
parts

Lungs

BC
Heart

AD

Lower body
parts

Four blood samples are taken at the same time from blood vessels A, B, C and D .

The graph below shows the amount of carbon dioxide in each blood sample.

Amount of
carbon dioxide

(units)

PQ RS Blood sample

Which one of the following shows correctly the amount of carbon dioxide in the blood
samples taken from blood vessels A, B, C and D?

ABCD
(1) P Q R S
(2) R S P Q
(3) Q P S R
(4) S R Q P

()

18

Primary 6: Rocket Science
21. A rubber ball was thrown and moved through a path as shown below.

Y
X

Which of the following graphs best represents the change in the amount of potential energy
and kinetic energy as the ball moved from X to Y?

(1) Energy Potential Energy
(3) Energy Kinetic Energy

(2) Energy

time time
(4) Energy time

time

()

19

Primary 6: Rocket Science

22. David conducted a fair test using a wooden block and a spring balance.
He measured the amount of force needed to move the wooden block on its faces of
different areas of contact with the table surface.

wooden block

He concluded that the area of contact does not affect the frictional force between the
wooden block and the table surface.

Which of the following tables shows the correct set of results?

(1) Area of Force (2) Area of Force
contact needed contact needed
(cm2) (cm2)
20 (unit) 20 (unit)
15 10
20 50
15 15
20 100
15 30

(3) Area of Force (4) Area of Force
contact needed contact needed
(cm2) (cm2)
20 (unit) 100 (unit)
15 10
50 100
15 15
100 100
15 30

( )

20

Primary 6: Rocket Science

23. The diagrams below show what happened when an object was hung on a spring. A magnet
was then placed below the object.
support

spring

object magnet

Which of the following forces is/are pushing or pulling the object upwards? )

A: Magnetic force
B: Gravitational force
C: Elastic spring force

(1) A
(2) B
(3) A and C only
(4) B and C only

(

21

Primary 6: Rocket Science

24. Jessie set up the experiment as shown below. She used three similar well-watered potted
plants. She placed containers A and B in a brightly lit room and container C in a dark
cupboard.

light light

placed in
a dark cupboard

glass glass
container container

chemical BC
to absorb
carbon
dioxide

A

She measured the amount of carbon dioxide in each container after five hours.

Which graph correctly represents the amount of carbon dioxide in the containers?

(1) Amount of (2) Amount of
carbon dioxide carbon dioxide

A BC A BC

(3) Amount of (4) Amount of
carbon dioxide carbon dioxide

A BC ABC
(
)

22

Primary 6: Rocket Science
25. Joel set up the items as shown in the diagram below.

elastic band drum
marble

catapult

Which of the following best describes the energy conversion of the above when Joel
released the pull on the elastic band holding the marble?

(1) Kinetic energy  sound energy  heat energy
(2) Elastic potential energy  kinetic energy  sound energy
(3) Chemical potential energy  kinetic energy  sound energy
(4) Elastic potential energy  sound energy  gravitational potential energy

()

23

Primary 6: Rocket Science

26. John hung three balls of the same size P, Q and R using three different elastic bands on a
fixed pole as shown in the diagram below.

fixed pole

Ball P elastic band
Ball R

Ball Q

Which of the following statements about the experiment are definitely true?

A: Ball P is the lightest object.
B: All the three balls possess potential energy.
C: Ball R is heavier than Ball P but lighter than Ball Q.
D: Ball Q will possess kinetic energy when the elastic band is cut.

(1) A and C only
(2) B and D only
(3) A, B and C only
(4) A, B, C and D

( )

24

Primary 6: Rocket Science

27. Richard found a section of an information print-out on killer litter. The information on the
piece of paper started him thinking about the gravitational potential energy of different
killer litter.

HDB infoWEB: Keep killer litter away – Help keep our estates safe

All residents have a civic responsibility to ensure that they do not place or
hang any objects within or outside the flat in a manner that poses a threat to
public safety. Likewise, they must not throw any objects from their flats as
these can injure passers-by and damage properties below.

Residents are encouraged to observe some simple “Do’s” and “Don’ts”:

Which one of the following has the greatest gravitational potential energy and is likely to
cause the greatest injury?

(1) (2)

Small clay Large clay
flower pot on flower pot on
the fifth floor the fifth floor

blobclok cokf floafts
flats

(3) (4) Large clay
flower pot on
Small clay bblolcokcokf oflafts the second
flower pot on flats
the second floor

floor ()

25

Primary 6: Rocket Science

28. Joanna made an observation of two identical metallic spheres, P and Q, each hung
by a string from a retort stand. Sphere P was pulled to position X and released. When
Sphere P hit Sphere Q, Sphere Q swung up to position Y.

Retort Stand

P
PQ

X ZY

Which of the following statements best describe the spheres at their different positions?
A: The amount of gravitational potential energy possessed by Sphere P
decreased as it moved from position X towards position Z.
B: The gravitational force acting on Sphere P decreased as it moved from
position X to position Z.
C: Sphere P transferred its energy to Sphere Q when it struck Sphere Q at
position Z.
D: The distance between Sphere Q at position Y and the ground is greater than
the distance between Sphere P at position X and the ground.

(1) A and B only
(2) A and C only
(3) B and D only
(4) A, C and D

()

26

Primary 6: Rocket Science

SECTION B : (44 marks)
For questions 29 to 42, write your answers in this booklet. The number of marks available is
shown in the brackets [ ] for each question or part question.
29. The diagrams below show 2 organisms.

Staghorn fern Mushroom

(a) State how the 2 organisms reproduce. [1]

(b) Ahmad says that the mushroom is a non-flowering plant. Give a reason why you

agree or disagree with him. [1]

27

Primary 6: Rocket Science

30. The diagram below shows the cross-section of a germinating seed of a bean plant.

Part A

Part B
(inside the seed)

(a) Name Part A. [1]

________________________________________________________________

(b) What is the function of Part B during germination? [1]

(c) Tick the factors that are required for germination of the seed. [1]

Factors Put a tick (✓) if it is one of the factors for
germination
Water
Warmth

Food
Light energy

Air

28

Primary 6: Rocket Science

31. Alexis used four materials, D, E, F and G to make rods of the same shape and length
as shown in the diagram below. She hung weights in the middle of each rod until the
rod broke.

She recorded the results as shown below.

Material Number of weights needed to break the rod
D 9
E 8
F 7
G 6

(a) What property of materials is Alexis testing? [1]

(b) Based on the results, what can Alexis infer about material D? Explain your [1]
answer.

(c) State two other variables that must be kept the same in this experiment. [2]
(i)
(ii)

29

Primary 6: Rocket Science

32. Elvin wanted to cook some instant noodles. He poured some boiling water into the cup
as shown below.

lid
cup noodle

His mother advised him to cover the lid so that the noodles would take a shorter time to
cook.

(a) Why does covering the lid help to cook the noodle faster? [1]

His father told him pouring more boiling water into the cup noodle would allow the
noodles to cook faster too.

(b) Do you agree? Explain your answer. [1]

30

Primary 6: Rocket Science

33. Ben filled two identical cans with 250ml of hot water. He wrapped a strip of metal

around each of the cans. thermometer

thermometer strip of

strip of metal

metal

Can A Can B

He recorded the temperature of water in each can every five minutes.

The table shows his results.

Time (minutes) Temperature (oC)

0 Can A Can B
5
10 60 60
15
54 57

50 54

46 52

(a) What was the aim of Ben’s experiment? [1]

________________________________________________________________

________________________________________________________________

(b) Which metal can, A or B, should Ben use to keep a cold drink cool for a longer [2]
time? Explain your answer clearly.

(c) Ben’s friend suggested that he could make the results more reliable by repeating

the experiments a few times. How does this make the results more reliable? [1]

________________________________________________________________

________________________________________________________________

31

Primary 6: Rocket Science

34. Richard has designed a circuit for an automatic top-up system for his fish tank, as
shown below. The lever is fixed such that when one end moves down, the other end
moves up. The ball is also heavier than the metal plate.

water hose lever reservoir
ball
metal
plate

tank water pump

When the water level in the tank falls, the circuit will start up the water pump which pumps
water from the reservoir into the tank.

(a) What property must the ball have to allow this system to work? [1]

(b) Describe how the pump gets started up when the water level falls. [1]

(c) Richard notices that the water level drops too low before the pump starts.

Without changing the lever, state two ways he can change the set-up so that the

pump starts up at a higher water level. [2]

(i)

(ii)

32

Primary 6: Rocket Science

35. The females of Fish A lay many eggs at a time on the sea bed. The eggs are fertilised
when the male fish deposits the sperms over the eggs as it swims over them. The
diagram below shows this process.

Sea bed

(a) State one advantage of the male fish releasing many sperms over the eggs. [1]

(b) How does laying many eggs benefit Fish A? [1]

33

Primary 6: Rocket Science

36. Two water pipes of the same thickness and size but made of different materials are
located in the same room. The temperature in the room is 30°C.
Both pipes transport water at 20°C from the same water tank.
At certain times, water droplets can be seen forming on pipe B but not on pipe A.

water
droplets

pipe A pipe B
(a) Explain how the water droplets form on pipe B.
[1]

(b) State the difference in the property of the materials of pipes A and B and explain

why water droplets do not form on pipe A. [2]

34

Primary 6: Rocket Science

37. Mr Chong carried out an experiment to find out how the speed of running water affects
the amount of electricity produced.
Datalogger to measure
the amount of electricity

blade of
turbine

Direction of water [1]
(a) Complete the energy conversion below based on the experiment above.

energy energy energy
(Stream of water) (Spinning Turbine) (Generator)

(b) Besides changing the speed of the running water, state one other change that
Mr Chong could do to the set-up to increase the amount of electricity produced. [1]

(c) Give one advantage of producing electricity using this method? [1]

35

Primary 6: Rocket Science

38. Solar panel is connected to a buzzer shown in the diagram below.

buzzer

torch solar panel

wires

(a) Write down the energy conversion that took place when the torch was shone on

the solar panel. [1]

Light energy from the torch

____________________________ energy in the solar panel

energy of the buzzer

(b) A green plant has a cell part that absorbs light similar to the solar panel shown in

the diagram above. Name the cell part. [1]

(c) In the diagram of a plant cell below, indicate the cell part in (b) with an ‘X’. [1]

36

Primary 6: Rocket Science

39. Sam constructed a toy by inserting a rubber band through a hole in the spool. The
rubber band was held in place by two sticks. He turned the longer stick several times to
twist the rubber band, as shown in the diagram below.

ssppooool l

stick

stick

twisted
rubber
band

Cross section of toy

When Sam released the toy at point A on the floor, it moved and came to a stop at point C,
as shown in the diagram below.

| ||
A BC

(a) What was the source of the energy for the toy to move? [1]

________________________________________________________________

(b) Name one force that was acting on the toy at point B. [1]

_______________________________________________________________

(c) Explain clearly why the toy eventually stopped at point C. [2]

________________________________________________________________

________________________________________________________________

37

Primary 6: Rocket Science

40. Alice carried out an experiment using two springs, X and Y, to find out how the mass of
an object hung on a spring affects its length. She recorded the results and plotted the
graph below.

Length of spring (cm) Spring X

Spring Y
12

10
8

6

4

2

0 Load (g)
10 20 30 40 50 60 70 80 90

(a) What was the length of the springs when a 50 g load is attached to them? [1]

Spring X : cm

Sprint Y : cm

(b) What was the original length of spring when no weights were hung on them? [1]

________________________________________________________________

(c) Which spring, X or Y, is more elastic? Give a reason for your answer. [1]

________________________________________________________________

________________________________________________________________

38

Primary 6: Rocket Science

41. Matthew wanted to investigate how the number of weights placed on a weight holder
will affect the amount of force needed to move it. He placed the weight onto the weight
holder, one at a time, and used a spring balance to pull it.

Matthew recorded the force needed to pull the weight holder each time a weight was added
to it as shown in the table below.

Number of weights Spring balance reading (N)
1 0.30
2 0.45
3 0.60
4 0.75

(a) As Matthew pulls the spring balance, a force is exerted between the weight [1]
holder and the table. Name this force.

(b) What can Matthew conclude about the number of weights and the amount of [1]
force needed to pull them?

39

Primary 6: Rocket Science

The diagram below shows a “magic carpet” which helps to move skiers up the snow
slope so they can ski down the slope.

skier direction of motion

“magic carpet”

skiing boards with smooth
underside surfaces

(c) Explain why it is important for the “magic carp et” to have a rough surface. [1]
____________________________________
____________________________________

skiing boards

Total mass of Tom with Total mass of Mr Tan with
skiing board is 30 kg skiing board is 70 kg

(d) Give a reason why the “magic carpet” uses more electrical energy to move [1]
Mr Tan up the snow slope compared to his son.

40

Primary 6: Rocket Science

42. Sharon hung a container filled with water from the ceiling and placed a metal tray under
it. Drops of water in the container escapes through the hole and hits the metal tray,
producing a sound.

ceiling

hole container with
a drop of water water

metal tray

(a) State the main energy change as a drop of water escapes from the container and

hits the metal tray. [1]

energy energy energy
(of the drop of water (of the drop of water)
(when the drop of water
in the container) hits the metal tray)

Sharon wanted the sound produced by the drop of water to be louder. She filled
the container with more water.

(b) Explain how filling the container with more water helps to make the sound louder

when a drop of water hits the metal tray. [1]

_________________________________________________________________

(c) State another change Sharon could make to increase the sound of the water [1]
droplets.

41