Genius PBD Science Year 4

CONTENTS







Rekod Pencapaian Pentaksiran Murid iii – vi


UNIT 1 Scientific Skills 1
• Genius Notes • PBD Module • Summative Practice 1

UNIT 2 Humans 7
• Genius Notes • PBD Module • Summative Practice 2 3D Video Quiz


UNIT 3 Animals 19
• Genius Notes • PBD Module • Summative Practice 3 3D Video

UNIT 4 Plants 30
• Genius Notes • PBD Module • Summative Practice 4 Video Quiz

UNIT 5 Properties of Light 39
• Genius Notes • PBD Module • Summative Practice 5 Simulation

UNIT 6 Sound 49
• Genius Notes • PBD Module • Summative Practice 6 Info Quiz


Mid-year Assessment 57


UNIT 7 Energy 66
• Genius Notes • PBD Module • Summative Practice 7 Video


UNIT 8 Materials 77
• Genius Notes • PBD Module • Summative Practice 8 Video Quiz

UNIT 9 Earth 87
• Genius Notes • PBD Module • Summative Practice 9 Video

UNIT 10 Machines 96
• Genius Notes • PBD Module • Summative Practice 10 Quiz


Year-end Assessment 105


Answers A1 - A8




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00A Kandungan Genius PBD SCIENCE YR4.indd 2 19/10/2022 4:51 PM

REKOD PENCAPAIAN PENTAKSIRAN MURID


Science Year 4


Teacher's name: Pupil's name: Class:

Achievement
Performance
Unit Descriptor Page
Level Not Yet
Achieved
Achieved
SCIENCE
1 Recall the science process skills. 2 – 3

2 Describe the science process skills 2 – 3
1 3 Apply the science process skills 2 – 3

Scientific Analyse the science process skills to solve problems or
Skills 4 to perform a task 3 – 4
1.1 Science Evaluate the science process skills to solve a problem
Process Skills 5 or to perform a task 3 – 4

Design an experiment to solve a problem systematically
6 3 – 4
and be responsible to oneself, peers and environment.
1 Label the organs involved during the breathing process 8

2 Explain the breathing process in terms of air passage 9

2 3 Make generalisation on the chest movement during the 9
breathing process
Human 4 Differentiate the content of oxygen and carbon dioxide 9
during the breathing process
2.1 Human
Breathing Process 5 Conclude that the rate of breathing depends on the 10
types of activities
Communicate creatively and innovatively on situations
6 which give good and bad effects on human breathing 10
and provide suggestions to keep the lungs healthy
1 State the meaning of defecation 11

2 List the products of excretion and defecation 11
3 Describe excretion and defecation 11
2.2 Excretion and Match the organs with the products of excretion using
Defecation 4 graphic organisers 11
Provide reasoning on the importance of excretion and
5 12
defecation in human
Communicate creatively and innovatively good practices
6 12
to ensure excretion and defecation are not disrupted


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00B Rekod Genius PBD SCIENCE YR4.indd 3 19/10/2022 4:54 PM

1 State the sensory organs of human 13

2 State that humans respond to stimuli 13

3 Match a stimulus to its response(s) in a situation 14
2.3 Humans
Respond to 4 Give examples on how humans respond to stimuli 14
Stimuli
Summarise the importance of humans response to
5 14
stimuli

Communicate creatively and innovatively concerning
6 habits that should be avoided to prevent damage to 15
the sensory organs and present the findings

1 Label the breathing organs of animals 20

2 List the examples of vertebrates and invertebrates 23

3 3 Give examples of specific characteristics for each class 24
of vertebrates
Animals
Classify vertebrates based on their specific
3.1 Breathing 4 characteristics 25
Organs of
Animals Summarise that some animals have more than one
5 22
3.2 Vertebrates breathing organ
Communicate creatively and innovatively on the
breathing organs of animals and classify vertebrates
6 22
and their specific charateristics to each class and
present the findings
1 State parts of plants that respond to stimuli 31


4 2 Describe the process of photosynthesis 33 – 34
Explain with examples the responses of parts of plants
Plants 3 32
to stimuli
4.1 Plants
Respond to 4 Provide reasoning on the importance of photosynthesis 35
for living things
Stimuli
4.2 5 Test the hypothesis that plants respond to stimuli 32
Photosynthesis
Communicate creatively and innovatively on
6 the importance of plants’ responses that help 32, 35
photosynthesis.







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00B Rekod Genius PBD SCIENCE YR4.indd 4 19/10/2022 4:54 PM

State that light travels in a straight line, can be reflected 40 – 41,
1
and refracted 44 – 45
5 2 Sketch a ray diagram to show reflection of light from 44

Properties of a mirror
Light Give examples of situations in daily life that show light
3 40, 44
travels in a straight line, can be reflected and refracted
5.1 Light Travels
in a Straight Line Provide reasoning on the importance of properties of
4 44
5.2 Reflection of light in daily life
Light
Conclude the factors that affect the size and shape of
5.3 Refraction of 5 the shadow 42 – 43
Light
Communicate creatively and innovatively on
6 innovations of device that apply properties of light to 45
solve problems in daily life

1 List ways to produce sound 50

2 State that sound is produced by vibrations 50

6 3 Make generalisation that sound travels in all directions 51

Sound Explain through examples the phenomena that show
4 sound can be reflected 52
6.1 Sound
5 Solve problems to reduce sound pollution in daily life 53

Communicate creatively and innovatively on the effects
6 53
of sound in daily life and present the findings
1 List the sources and forms of energy 67 – 68

7 2 Describe renewable and non-renewable energy 71
sources
Energy
3 Explain with examples the transformation of energy 69
7.1 Sources and
Forms of Energy Provide reasoning on the importance of saving energy
4 72
7.2 Renewable for sustainability of energy sources
and
Non-renewable 5 Carry out activities to prove the transformation of 70
Energy Sources energy that occurs in daily life

Communicate creatively and innovatively on
6 73
innovations in the use of energy resources in the future






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00B Rekod Genius PBD SCIENCE YR4.indd 5 19/10/2022 4:54 PM

1 Match materials to their basic sources 78

Characterise objects based on type of materials and
2 79
basic sources
8
3 Classify objects based on materials or basic sources 80
Materials
8.1 Basic Sources 4 Make generalisation on the properties of materials by 82 – 83
of Materials carrying out investigation
8.2 Properties of Make inferences on the materials used for each part 81 – 82,
Materials 5 of the object 84


Create an object by applying the knowledge of the
6 properties of the materials and present it in a creative 84
and innovative way

State that the Earth rotates on its axis and at the same
1 90
time revolves around the Sun in its orbit
9 2 Explain the gravitational pull of Earth 89

Earth 3 Describe the effects of rotation of the Earth 91

9.1 Gravity of
Earth 4 Provide reasoning on the importance of the gravitational 89
pull on the Earth
9.2 Rotation and
Revolution of Summarise the rotation and revolution of the Earth
Earth 5 using graphic organisers 92 – 93


Communicate creatively and innovatively on other
6 93
effects of the rotation and revolution of the Earth
1 Give examples for each type of simple machines 98


Describe the simple machines found in a complex
2 machine 99
10

Machines 3 Make generalisation on the relationship between the 97
distance of load from fulcrum with the required force
10.1 Lever
10.2 Simple 4 Generate ideas to solve problems involving the use of 100
Machines machines
and Complex
Machines 5 Communicate to show the importance of inventing 100
sustainable machines

Design a model of complex machine and present it
6 101
creatively and innovatively


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00B Rekod Genius PBD SCIENCE YR4.indd 6 19/10/2022 4:54 PM

Date:
UNIT 1 Scientific Skills THEME : Inquiry in Science








Genius Notes State a way to test a hypothesis that
you have made.


Science Process Skills

Science process skills are important skills that involves the inquiry method and problem
solving method. There are 12 science process skills that you have to learn and practice.





Observing


Classifying
Experimenting



Measuring and using
Making hypothesis numbers






Controlling variables Science Making inferences
Process Skills




Defining operationally Predicting




Interpreting data Communicating




Using space-time
relationship












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01 Unit 01 Genius PBD SCIENCE YR4.indd 1 19/10/2022 4:56 PM

Science Year 4 Unit 1 Scientific Skills Date:


PBD MODULE 1.1 Science Process Skills Textbook: 2 – 21
LS 1.1.1 Observe by using all the senses involved and tools if necessary to make qualitative observations to explain the phenomena or changes that occur.
LS 1.1.2 Classify by comparing or identifying similarities and differences based on common characteristics.
LS 1.1.4 Make inferences by stating the initial conclusion or by giving reasonable explanations for the observation made using the information gathered.

1. State the sensory organs used to make the following observations. LS 1.1.1 PL 1

(a) The sound made when someone taps
a cup with a spoon.




(b) The orange juice in glass P is sweeter
than the orange juice in glass Q.


P P Q Q

2. Classify the following objects according to its ability to absorb water. LS 1.1.2 PL 1 PL 2 PL 3


Tree Map


Towel Mirror Handkerchief Sponge Plastic bag Eraser Socks Buoy
i-THINK Map Can absorb water Cannot absorb water














3. Write an inference for the observations below. LS 1.1.4 PL 1 PL 2 PL 3 HOTS Applying

(a)
Observation: The bulb in the circuit does not light up.
Inference:


(b)
Observation: The plant in the pot has wilted.
Inference:





PERFORMANCE LEVEL ( ) 1 2 3 4 5 6


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01 Unit 01 Genius PBD SCIENCE YR4.indd 2 19/10/2022 4:56 PM

Date: Science Year 4 Unit 1 Scientific Skills


LS 1.1.5 Predict by making reasonable assumptions about an event or phenomenon based on observations, prior experiences or data.
LS 1.1.9 Define operationally by describing an interpretation of a task carried out and observed in a situation according to determined aspects.
LS 1.1.10 Control variables by determining the responding and constant variables after the manipulated variable in the investigation have been determined.
LS 1.1.11 Make a hypothesis by making a general statement that can be tested based on the relationship between the variables in the investigation.


4. A group of Year 4 students conducted an investigation to test the strength of magnets.
The paper clips of same size were used.


Magnet Size Number of paper clips attracted to the magnet
P Small 6
Q Medium 12
R Large 18


(a) State the hypothesis for the investigation above. LS 1.1.11 PL 3 HOTS Applying






(b) Identify the following variables: LS 1.1.10 PL 1 PL 2 PL 3 HOTS Applying
(i) Constant variable:

(ii) Manipulated variable:

(iii) Responding variable:


(c) State the operational definition for the strength of a magnet. LS 1.1.9 PL 4 HOTS Analysing





(d) Another magnet, S is used in this investigation. Magnet S is larger than magnet
R. Predict the number of paper clips that will be attracted to magnet S. LS 1.1.5 PL 3

HOTS Applying




(e) Circle the objects that will be attracted to magnets. PL 4 HOTS Analysing









PERFORMANCE LEVEL ( ) 1 2 3 4 5 6


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01 Unit 01 Genius PBD SCIENCE YR4.indd 3 19/10/2022 4:56 PM

Science Year 4 Unit 1 Scientific Skills Date:


LS 1.1.12 Experiment by using the basic science process skills to collect and interpret data, summarise to prove the hypothesis and write a report

5. A group of students were asked to conduct an experiment to test the part of a plant
that responds to light. The diagram below shows the setup for the experiment.
LS 1.1.12 PL 4 PL 5 PL 6 HOTS Creating










Plan and conduct the experiment to test your hypothesis. Then write a simple report
about the results of the experiment in the space provided.



Problem statement: Which part of a plant responds to light?

(a) Hypothesis:

(b) Variables:
(i) Manipulated variable:

(ii) Responding variable:
(iii) Constant variables:

(c) Apparatus and materials:

(d) Steps:








(e) Results:



(f) Conclusion:





PERFORMANCE LEVEL ( ) 1 2 3 4 5 6

Teacher’s Signature: Date:


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01 Unit 01 Genius PBD SCIENCE YR4.indd 4 19/10/2022 4:56 PM

SUMMATIVE PRACTICE 1





Objective Questions





1. Maisarah identifies a fruit with her Reproduction method
sense of smell. What is the sensory
organ used by Maisarah? PL 1
A Skin
B Nose • Cat • Turtle
C Tongue • Kangaroo • Bird
D Eyes • X • Y
Diagram 1
2. The information below explains a What are animals X and Y?
science process skills. PL 1
X Y
Making an early conclusion about A Cockroach Lion
an incident based on an observation
B Whale Frog
C Lizard Horse
What is the science process skill?
A Making a hypothesis D Butterfly Elephant
B Communicating
C Making inferences 5. Table 1 shows the time taken by four
D Interpreting data pupils to end a 100-metre race. PL 4
HOTS Analysing
3. Husna wants to sew a set of baju Table 1
kurung for her younger sister. Which
tool is suitable for Husna to measure Pupil Time taken (seconds)
her younger sister’s body size? PL 2 Alif 15
A Ruler Iwan 30
B Measuring tape Farid 21
C Paper clip
D Thread Hafiz 11
What is the conclusion that can be
4. Diagram 1 shows a classification of made based on the table above?
animals based on their reproduction A Alif is the fastest runner.
method. PL 4 HOTS Analysing B Farid is the slowest runner.

C Hafiz runs faster than Alif.
D Farid runs slower than Iwan.






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01 Unit 01 Genius PBD SCIENCE YR4.indd 5 19/10/2022 4:56 PM

Science Year 4 Unit 1 Scientific Skills Date:


Subjective Questions



1. In an investigation, two grasshoppers were placed in three glasses of different sizes.
The results of the investigation are recorded in the table below.





Glass K L M
Lifespan of the 40 60 80
grasshoppers (minutes)
K L M

(a) State one observation based on this investigation. PL 1





[1 mark]

(b) State one reason (inference) based on your answer in 1(a). PL 3 HOTS Applying




[1 mark]
(c) Match the information below with the correct variables in this investigation. PL 2


Information Variables


Manipulated variable
(i) Lifespan of grasshoppers
Constant variable
(ii) Size of glass
Responding variable

[2 marks]
(d) What hypothesis can be made from this investigation? PL 3 HOTS Applying





[1 mark]








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01 Unit 01 Genius PBD SCIENCE YR4.indd 6 19/10/2022 4:56 PM

Date:
UNIT 2 Humans THEME : Life Science








Genius Notes State three of your
excretory organs.





Human breathing organ Inhaling Exhaling

Human breathing organ is Nose
the lungs Air goes Lungs Air goes
in out
Nose Lungs carry out the gas
exchange between oxygen
Trachea
Lungs and carbon dioxide
Air goes in Air goes out
The breathing tract of
humans includes the Lungs expand and Lungs contract and
chest falls
chest rises
nose and trachea


Human responses
to stimuli











Covering nose Shivering Covering ears Closing eyes Frown upon
upon unpleasant when cold upon listening upon seeing tasting sour
smell to loud noises bright light food





Skin eliminates sweat Excretion: A process of removing waste
Lungs eliminate carbon materials from the body
dioxide and water vapour
Kidneys eliminate urine defecation: The removal of faeces through the
anus



PERFORMANCE LEVEL ( ) 1 2 3 4 5 6


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02 Unit 02 Genius PBD SCIENCE YR4.indd 7 19/10/2022 4:57 PM

Science Year 4 Unit 2 Humans Date:


PBD MODULE 2.1 Human Breathing Process Textbook: 24 – 36
LS 2.1.1 Identify the organs involved in the breathing process.

1. (a) The diagram below shows the organs which are involved in the breathing
process of humans. Label the organs correctly. LS 2.1.1 PL 1



Trachea Lungs Nose








(i)



(ii)




(iii)











(b) Based on the diagram above, complete the following statements. PL 1


(i) Humans have lungs.


(ii) The are the organs that carry out the exchange of
oxygen and carbon dioxide.


(iii) Air goes out and comes in through the .


(iv) The is the breathing tract in the human body.


(v) The trachea is connected to the right and left .




PERFORMANCE LEVEL ( ) 1 2 3 4 5 6


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02 Unit 02 Genius PBD SCIENCE YR4.indd 8 19/10/2022 4:57 PM

Date: Science Year 4 Unit 2 Humans


LS 2.1.2 Describe the breathing process in terms of air passage and exchange of gases in the lungs through observation by using various media.
LS 2.1.3 Differentiate the content of oxygen and carbon dioxide during inhalation and exhalation.
LS 2.1.4 Describe the chest movement during inhalation and exhalation by carrying out activities.


2. (a) Draw the air passage in the diagram below during: LS 2.1.2 PL 2
(i) Inhalation using the arrow ( ).
(ii) Exhalation using the arrow ( ).

(b) Then, complete the air passage for the two processes below.

Inhalation Exhalation




























3. Fill in the blanks with the correct answers. LS 2.1.3 LS 2.1.4 PL 3 PL 4 HOTS Analysing


Inhalation Exhalation

(a) During inhalation, our chest (a) During exhalation, our chest
moves and moves and
expands. At the same time, air contracts. At the same time, air
the lungs. the lungs.


(b) The inhaled air has (b) The exhaled air has
oxygen and carbon dioxide
carbon dioxide. and oxygen.






PERFORMANCE LEVEL ( ) 1 2 3 4 5 6


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02 Unit 02 Genius PBD SCIENCE YR4.indd 9 19/10/2022 4:57 PM

Science Year 4 Unit 2 Humans Date:


LS 2.1.5 Make generalisation that the rate of breathing depends on the types of activities carried out.
LS 2.1.6 Explain the observations on human breathing through written or verbal forms, sketches or ICT in a creative way.

4. (a) The diagram below shows activities carried out by Farid. Classify the following
activities based on the correct rate of breathing. LS 2.1.5 PL 5

HOTS Applying HOTS Analysing Tree Map
i-THINK Map







Watching television
Walking Jogging Running


Going up
the stairs
Cycling Sleeping Studying Swimming



Low rate of Moderate rate of High rate of
breathing breathing breathing










(b) What conclusion can be made from the mind map above?








5. Divide the class into several groups. Each group made a study of situations that have
both positive and negative effects on human respiration and how to maintain lung
health. Then, choose one person from each group to play the character as a doctor
Activity PAK–21 to discuss that topic. LS 2.1.6 HOTS Evaluating PAK21
PL 6








PERFORMANCE LEVEL ( ) 1 2 3 4 5 6


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02 Unit 02 Genius PBD SCIENCE YR4.indd 10 19/10/2022 4:57 PM

Date: Science Year 4 Unit 2 Humans


PBD MODULE 2.2 Excretion and Defecation Textbook: 37 – 42
LS 2.2.1 State the meaning of excretion and defecation.
LS 2.2.2 Identify the organs and products of excretion.


6. Complete the statement below. LS 2.2.1 PL 1

faeces waste product anus

(a) Excretion: The removal of from the body.

(b) The removal of from the .


7. Complete the sentences in the comic below about the excretory organs, defecation
and their products. LS 2.2.2 PL 2 PL 3 PL 4
Science
Comic
Pupils, what do you know about
excretory organs, defecation and
their products? The (a) When we breathe, our lungs
excretes sweat. release (b) Science Comic
and (c) .














During defecation, we excrete
The organ that produces urine is the (h) from our body
(d) . The waste products through the (i) in the
in the urine are (e) , form of faeces.
(f) and (g) .




3D Model
My Excretory
Organs








PERFORMANCE LEVEL ( ) 1 2 3 4 5 6


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02 Unit 02 Genius PBD SCIENCE YR4.indd 11 19/10/2022 4:57 PM

Science Year 4 Unit 2 Humans Date:


LS 2.2.3 Make inferences on the importance to get rid of products of excretion and defecation.
LS 2.2.4 Explain the observations on human excretion and defecation through written or verbal forms, sketches or ICT in a creative way.

8. (a) Write the importance of humans going through excretion and defecation
processes. LS 2.2.3 PL 5 HOTS Evaluating

(i)







(ii)








(iii)







(b) What is the importance of going to the washroom when in need and eating a
balanced diet for your digestive system? PL 5 HOTS Evaluating
















9. Create a graphical presentation about the effects of irregular excretion and defecation
and present it in front of the class. LS 2.2.4 PL 6 PAK21

PAK-21 Activity











PERFORMANCE LEVEL ( ) 1 2 3 4 5 6


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02 Unit 02 Genius PBD SCIENCE YR4.indd 12 19/10/2022 4:57 PM

Date: Science Year 4 Unit 2 Humans


PBD MODULE 2.3 Human Responses to Stimuli Textbook: 43 – 48
LS 2.3.1 State that humans respond when the sensory organs receive stimuli.

10. Fill in the correct answers. LS 2.3.1 PL 2

(a) Humans respond to .

(b) Humans respond to stimuli when the sensory organs receive ,
, , and stimuli.


11. Match the sensory organ that responds to its stimulus. LS 2.3.1 PL 1


(a)
Tastes sweet, sour, salty and bitter
substances





(b)
Responds to light





(c)
Responds to sound






(d)
Holds and touches, feels warmth,
coldness and pressure





(e)
Used for smelling










PERFORMANCE LEVEL ( ) 1 2 3 4 5 6


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02 Unit 02 Genius PBD SCIENCE YR4.indd 13 19/10/2022 4:57 PM

Science Year 4 Unit 2 Humans Date:


LS 2.3.2 Explain with examples humans respond to stimuli in daily life.
LS 2.3.3 Make inferences on the importance of human response to stimuli.

12. The table below shows situations or stimuli that cause responses in humans. Write
the correct sensory organ and response in each of the following boxes. LS 2.3.2 PL 4

(a) Situation Touches a hot kettle

Sensory organ
Response

(b) Situation Smells a bad-smelling rubbish bin
Sensory organ

Response

(c) Situation Tastes sour lemon juice
Sensory organ

Response

13. The diagram below shows a girl retracting her hand when she accidentally touched

a hot iron. LS 2.3.2 LS 2.3.3



Video
Human responses
to stimuli


(a) Based on the diagram above, state the: PL 3
(i) Stimulus:

(ii) Response:


(b) Predict what would happen if the girl did not retract her hand quickly.





(c) State one importance of human response to stimuli. PL 5 HOTS Evaluating








PERFORMANCE LEVEL ( ) 1 2 3 4 5 6


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02 Unit 02 Genius PBD SCIENCE YR4.indd 14 19/10/2022 4:57 PM

Date: Science Year 4 Unit 2 Humans


LS 2.3.4 Explain habits that disrupt the process of human response to stimuli.
LS 2.3.5 Explain the observations on human response to stimuli through written or verbal forms, sketches or ICT in a creative way.

14. The diagrams below show several human habits. Based on the diagrams given,
state the habits. Then, cross (✗) the habit that brings harm to human life processes.
LS 2.3.4

(a) (b)









(c) (d)









(e) (f)











(g) (h)










15. Carry out this activity in groups. Gather information about the habits that can cause
damage to our sensory organs that must be avoided. Use a variety of sources such
as the Internet and the library to gather information. Present the results of your
discussion. LS 2.3.5 PL 6 PAK21 PAK-21 Activity

PERFORMANCE LEVEL ( ) 1 2 3 4 5 6

Teacher’s Signature: Date:


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02 Unit 02 Genius PBD SCIENCE YR4.indd 15 19/10/2022 4:58 PM

SUMMATIVE PRACTICE 2





Objective Questions



1. Table 1 shows Rosli’s rate of breathing, A Sweat
which is X, during an activity and at B Urine
rest. C Water vapour
Table 1 D Carbon dioxide
Activity X Rehat 4. Why are excretion and defecation

Rate of Tinggi Rendah important to humans? PL 5
breathing A For energy
B To control the body temperature
What is the possible activity of X? PL 5 C To maintain health
A Reading D To respond to stimuli
B Watching television
C Playing football 5. Which activity causes high breathing
D Playing piano rate? PL 5

2. What is meant by excretion? PL 1 A C
A Removal of carbon dioxide from
the lungs
B Removal of urine from the kidneys
C Removal of waste products from B D
the body
D Removal of faeces from the body

3. Diagram 1 shows a situation
experienced by a girl.
6. What is the response of a pupil when
he finds a bee approaching him? PL 2
A He will scream when he is in
danger.
B He will move away to prevent
himself from being stung by the
bee.
C He will cry.
Diagram 1 D He will respond to stimuli.
What waste product is she going to
remove from her body? PL 2








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02 Unit 02 Genius PBD SCIENCE YR4.indd 16 19/10/2022 4:58 PM

Date: Science Year 4 Unit 2 Humans


Subjective Questions



1. Diagram 1 shows Ikmal’s daily activities.











Cycling Reading












Swimming Sleeping

Diagram 1
(a) Classify the activities into the correct rate of breathing in the table below.
HOTS Applying

High rate of breathing Low rate of breathing






[2 marks]
(b) Why is the rate of breathing higher when carrying out strenuous activities?









[1 mark]
(c) Write a relationship between the type of activity and the rate of breathing. PL 5
HOTS Analysing






[1 mark]

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02 Unit 02 Genius PBD SCIENCE YR4.indd 17 19/10/2022 4:58 PM

Science Year 4 Unit 2 Humans Date:

(d) State one disadvantage if somebody who is sick tries to carry out a strenuous
activity. HOTS Evaluating






[1 mark]
(e) State the definition of the rate of breathing.





[1 mark]


2. Diagram 2 shows a situation experienced by Syafiqah.

(a) Based on the diagram above, state the response to the
stimulus that happened. PL 4



[1 mark]

(b) Which sensory organ was involved in this stimulus response?

PL 1
Rajah 2
[1 mark]


(c) What would happen if the Syafiqah did not pull back her foot? PL 5 HOTS Evaluating



[1 mark]


(d) Based on your answer in 2(c), state two importance of taking care of our sensory
organs. HOTS Evaluating

(i)
(ii)

[2 marks]



Gamified
Quiz 1



Unit 1 – 2


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02 Unit 02 Genius PBD SCIENCE YR4.indd 18 19/10/2022 4:58 PM

ANSWERS






Medium rate of breathing:
UNIT 1 Scientific Skills
SUMMATIVE PRACTICE 1 Walking, jogging, going up
the stairs
1.1 Science Process Skills
Objective Questions High rate of breathing:
1. (a) Ear Running, cycling, swimming
(b) Tongue 1. B 2. C 3. B 4. B 5. C (b) Activities that are more
vigorous (running quickly
2. Can absorb Cannot absorb Subjective Questions and swimming) cause the
water water rate of breathing to increase
1. (a) The grasshoppers in glass K
die faster compared to the compared to other activities.
Towel Mirror 5. Student’s answer
grasshoppers in glass M.
Handkerchief Plastic bag (b) The grasshoppers in
Sponge Eraser glass K receive lesser 2.2 Excretion and Defecation
oxygen compared to the
Socks Buoy grasshoppers in glass M. 6. (a) waste products
(c) (i) Lifespan of grasshoppers: (b) faeces, anus
3. (a) The circuit is not connected 7. (a) skin
properly. / The bulb has Responding variable (b) carbon dioxide
burned out. (ii) Size of glass: Manipulated (c) water vapour
(b) The plant is not watered / variable (d) kidneys
does not get enough sunlight. (d) The bigger the size of the (e) urea
4. (a) The larger the size of the glass / the amount of air, (f) water
magnet, the more paper clips the longer the lifespan of a (g) mineral salts
it can attract. grasshopper. (h) undigested food
(b) (i) Size of paper clips (i) anus
(ii) Size of magnet UNIT 2 Humans 8. (a) (i) To prevent illnesses
(iii) Number of paper clips because through
attracted 2.1 Human Breathing Process excretion and defecation,
(c) The operational definition for we can eliminate
the strength of a magnet is 1. (a) (i) Nose products of excretion
the number of paper clips (ii) Trachea and faeces that are not
attracted to the magnet. (iii) Lungs needed by our body.
(d) More than 18 (b) (i) two (ii) Through defecation, we
(e) (ii) lungs can eliminate faeces that
(iii) nose can be poisonous when
5. (a) Shoot responds to sunlight. (iv) trachea accumulated in our body.
(b) (i) direction of light (v) lungs (iii) To prevent diseases such
(ii) direction of shoot growth 2. (a) (i) Draw from the nose to as gallstone, blood in
(iii) type and size of plant, the lungs through the urine or cancer which are
amount of water used to trachea caused by incomplete
water the plants (ii) Draw from the lungs to excretion and defecation
(c) Seedlings, black box, soil, pot, the nose through the process.
water trachea (b) It is important to eliminate
(d) 1. Two seedlings of similar (b) Inhalation: Nose → Trachea waste products that are
size are placed in two → Lungs not needed by the body so
black boxes with holes Exhalation: Lungs → Trachea that it will not accumulate in
cut at different places. → Nose the body and become toxic
2. The apparatus was put 3. Inhalation: or poisonous. A balanced
aside for 5 days. (a) upwards, enters diet intake especially food
3. The condition of the (b) more, less that contains fibre such
seedlings is observed Exhalation: as vegetables and fruits
after 5 days. (a) downwards, leaves are needed to prevent
(e) The seedlings grow towards (b) more, less constipation.
the holes. 4. (a) Low rate of breathing: 9. Student’s answer
(f) Shoot responds to sunlight. Sleeping, studying, watching
television


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13 Jawapan Genius PBD SCIENCE YR4.indd 1 19/10/2022 5:13 PM

Science Year 4 Answers

(d) Breathing difficulties / Lack of (b) Gills
2.3 Human Responses to Stimuli
oxygen in the body / Muscle (c) Lungs
10. (a) stimuli cramp because of a lack of (d) Moist skin
(b) light, smell, sound, taste and oxygen in the body. (e) Gills
touch (e) The rate of breathing is the (f) Lungs
11. (a) Responds toward light number of upward and 2. Lungs: Crocodile, frog
(b) Responds toward sound downward chest movements Gills: Tadpole, crab
(c) Used for smelling in one minute. Skin: Leech, frog
(d) Used for tasting sweet, sour, 2. (a) The foot was pulled away Spiracles: Grasshopper,
salty and bitter substances quickly when stepped on the caterpillar, butterfly
(e) Hold and touch, feel warmth, sharp nail. 3. (a) Frog
coldness and pressure (b) Skin (b) The animals need the organs
12. (a) Skin (c) Syafiqah’s foot will suffer to live both on land and in
Removes the hand from the serious injuries. water.
hot kettle (d) (i) So that our sensory (c) Salamander / Newt
(b) Nose organs would not be hurt 4. Pupil’s answer
Cover the nose with hands (ii) To prevent our sensory
(c) Tongue organs from not 3.2 Vertebrates
Screwed up face functioning normally.
13. (a) (i) A hot iron 5. (a) (i) Vertebrates are animals
with backbones.
(ii) Retracting her hand UNIT 3 Animals (ii) Invertebrates are animals
quickly with no backbones.
(b) The girl’s hand would be 3.1 Breathing Organs of Animals (b) Tiger, snake, deer, lizard
burned.
(c) Protect ourselves from danger 1. (a) Spiracles
14. (a) Drug abuse (✗) 6.
(b) Smoking (✗)
(c) Exercising Animals Method of Breathing Body covering Habitat
(d) Consuming alcoholic drinks reproduction organ
(✗) Mammals Gives birth Lungs Fine hair On land
(e) Consuming fruits and
vegetables Reptiles Lays eggs Lungs Scales or hard On land
(f) Consuming unhealthy food shells
(✗) Lungs, moist On land and in
(g) Getting enough rest and Amphibians Lays eggs skin Moist skin water
sleep
(h) Glue sniffing (✗) Birds Lays eggs Lungs Feathers On land
15. Student’s answer Fish Lays eggs Gills Scales In water

7. Mammals: Goat, whale skin as the breathing
SUMMATIVE PRACTICE 2 Reptiles: Lizard, turtle organ in water.
Amphibians: Frog 2. (a) (i) Lungs and moist skin
Objective Questions Birds: Ostrich, Eagle (ii) P is an amphibian that
Fish: Goldfish, shark has two breathing organs
1. C 2. C 3. B 4. C 5. B such as frogs. When
6. B animal P is on land, it
SUMMATIVE PRACTICE 3 breathes through the
Subjective Questions
lungs. When in water,
Objective Questions animal P breathes
1. (a) High rate of Low rate of through moist skin.
breathing breathing 1. D 2. B 3. B 4. A 5. C (b) • Animals in Q gives birth
Cycling Reading 6. C 7. B 8. B 9. B while animals in R lays
eggs.
Swimming Sleeping Subjective Questions • Animals in Q have fine
(b) This is because the body 1. (a) Spiracles hair while animals in R
requires more oxygen. / The (b) (i) and (iii) have scales or hard skin.
lungs need to take in more air. (c) (i) yes (c) Cockroach/ grasshopper/ ant
(c) The more strenuous the (ii) The animals stay alive (Accept any insects)
activity, the higher the rate of because they use their
breathing.


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13 Jawapan Genius PBD SCIENCE YR4.indd 2 19/10/2022 5:13 PM

Science Year 4 Answers

• Distance of light
UNIT 4 Plants
SUMMATIVE PRACTICE 4 source from the object
• Size of the shadows
4.1 Plant Responses to Stimuli
Objective Questions formed
1. (a) Shoots 1. D 2. A 3. C 4. A 5. D • Position of the screen
(b) Roots 6. A 7. A 8. B Steps:
(c) Leaves 1. An opaque object
(d) Roots Subjective Questions (ball) is placed at
2. different distances (5
(a) To show that sunlight is cm, 10 cm, 15 cm and
Parts of Type of needed by plants to carry out 20 cm) from the
the plant stimulus photosynthesis / make food. source of light (torch).
Leaves Water (b) Leaf Q turns yellow. 2. The size of the
(a) (c) Leaf Q did not get sunlight shadows formed
Roots Gravity to produce food / carry out are measured and
(b) Light photosynthesis. recorded in a table.
Shoots (d) (i) Responding variable Results:
(c) Touch (ii) Manipulated variable
3. (a) (i) The seedlings bent (e) Plants need sunlight to carry Distance between The size of the
the object from
towards the hole. out photosynthesis / make shadow formed
(ii) The roots of the seedlings food. source of light (cm)
bent towards the wet (cm)
cotton. UNIT 5 Properties of Light 5 12
(iii) The roots of the seedlings 10 10
bent downwards towards 5.1
gravitational pull. Light Travels in a Straight Line 15 8
(b) Plants respond to gravity, 1. (a) Ainul cannot see the light 20 6
water and light stimuli. from the candle, while
4. Pupil’s answer Mardhiah can see the light Conclusion:
The bigger the distance
from the candle. between the object and the
4.2 Photosynthesis (b) Mardhiah can see the light light source, the smaller is the
from the candle because light shadow formed.
5. (a) photosynthesis travels in a straight line. (b) (i) The shape of the
(b) sunlight (c) Light travels in a straight line. shadows changes.
(c) carbon dioxide (d) Using a torch at night (ii) The shape of the
(d) water (e) The shadow of the book shadows changes
(e) glucose because the position of
(f) oxygen will be formed on the wall the torch changes.
because the light is blocked
6. (a) sunlight, carbon dioxide, by an opaque object which is (c) The position of the source of
water, chlorophyll light
(b) chlorophyll the book. (d) The position of the object
(c) Sunlight 2. (a) (i) Paper cup
(d) glucose, oxygen (ii) Clear glass cup 5.2 Reflection of Light
(e) surroundings, starch (b) The paper cup produces clear
(f) Roots shadow because it is opaque 4. (a) Sunlight is reflected through a
(g) move in nature that does not allow mirror.
7. • Supplies oxygen to animals light to pass through it. (b) Light can be reflected
(c) (i) Front mirror and side
and humans (c) Light travels in a straight line mirrors of a car
• Supplies the source of food to (d) Leather (ii) Dental mirrors used by
humans and animals 3. (a) (i) The size of the shadow
• Maintains the balance of gas becomes smaller when (d) dentists
composition in the air the distance between the
• Cools the Earth by reducing the flower pot and the torch Light hitting Light reflected
from the
amount of carbon dioxide in increases. the surface surface of mirror
of mirror
the air (ii) Aim: To determine the
• Absorb carbon dioxide factors that affect the size
released by animals and of the shadow.
humans Variables:
8. Pupil’s answer Mirror

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13 Jawapan Genius PBD SCIENCE YR4.indd 3 19/10/2022 5:13 PM

Science Year 4 Answers

(c) (i) and (iii) (c) Increases
5.3 Refraction of Light
4. (a) Sonar 2. (a) Response to touch
5. (a) Light is refracted when it (b) Ultrasound (b) (i) Gravitational pull
moves from water to air. This (c) Echo (ii) Sunlight
causes the image of a straw 5. (a) Noise pollution makes (c) The root of the plant always
to appear lifted and bent. it difficult for humans to grows downwards because
(b) Light can be refracted communicate, causes hearing of the gravitational pull.
(c) The formation of rainbows problems, disturbs peace 3. (a) Moving the hand away
(d) Rainbows are caused by of mind as well as causes spontaneously as it touches a
the refraction of sunlight by emotional stress. thorn.
raindrops. (b) (i) Build a solid barriers (b) Skin
6. Pupil’s answer (ii) Use sound absorbing (c) The boy’s hand will be hurt.
material (d) To prevent injuries.
(c) Uses of sound: (e) Listening to the radio at a
SUMMATIVE PRACTICE 5 Communication, emergency very high volume; Directing
alert, notification, light to the eyes (accept any
Objective Questions entertainment (i-Think circle other correct answer)
map) 4. (a) Photosynthesis
1. A 2. D 3. D 4. A 5. C (b) Carbon dioxide + Water,
6. B 7. A 8. B
Glucose + Oxygen
SUMMATIVE PRACTICE 6 (c) X is the chlorophyll that
Subjective Questions
is found on plants and
1. (a) This tool reflects light to Objective Questions it absorbs sunlight for
parts of the teeth that are 1. C 2. B 3. D 4. D 5. D photosynthesis.
difficult to be seen and 6. C 7. A 8. D 9. D (d) Because plants cannot move
makes the process of dental to find food.
examinations easier. 5. (a) Periscope
(b) Periscope/ Car’s side mirrors Subjective Questions (b) This device is used to observe
(c) (i) Mirrors (a) Sound travels in all directions. conditions on the surface
(ii) Aluminium foil (b) The sound of a fire engine of the sea from inside a
2. (a) Light moves in a straight line. siren gave an emergency submarine.
(b) The distance between the signal to other drivers on the (c) The mirrors in the periscope
source of light and the object. road to give an emergency reflect light and enable
(c) route to the fire engine. humans to see the surface of
(c) (i) Can cause hearing the sea.
problem (d) Mirror / Dental mirror
(ii) Can cause disturbance (e)
(d) Reduce the distance between and stress
the object and the source of (d) Using a device that can Light hitting Light bouncing
the mirror
off the mirror
light. absorb sound / Build solid
barrier
UNIT 6 Sound
6.1 Sound
MID-YEAR ASSESSMENT Surface of a mirror
1. (a) Bowing
(b) Plucking Objective Questions UNIT 7 Energy
(c) Knocking 1. B 2. C 3. B 4. B 5. D
(d) Blowing 6. A 7. C 8. C 9. C 10. D 7.1 Energy
(e) Clapping 11. B 12. C 13. A 14. C 15. B 1. (a) Energy is the ability to do
(f) Beating 16. A 17. A 18. C 19. D 20. C work.
(g) Knocking 21. B 22. B 23. D 24. D 25. B
(h) Clapping (b) (i) Wind
(i) Beating Subjective Questions (ii) Water
2. Sound is produced by vibrations. (iii) Sun
(iv) Food
3. (a) P, Q and R can hear the 1. (a) (i) Low (v) Fossil fuels
sirens of the fire engine. (ii) High
(b) Sound travels in all directions. (b) Because his lungs need to (vi) Nuclear
take in more oxygen. (vii) Waves


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13 Jawapan Genius PBD SCIENCE YR4.indd 4 19/10/2022 5:13 PM