This document contains a science exam paper with multiple choice questions in both English and Malay. The exam covers topics in biology such as cells, human anatomy and physiology. It tests understanding of scientific concepts like states of matter, energy transfer, chemical reactions and ecological relationships. The 30 questions assess knowledge of key ideas and require analysis of diagrams, tables and processes.
Soalan Percubaan UPSR 2012 Negeri Melaka Soalan Sains Bahagian Aar-rifke.com
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Soalan Percubaan UPSR 2012 Negeri Melaka Soalan Sains Bahagian Aar-rifke.com
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Soalan Percubaan UPSR 2012 Negeri Melaka Soalan Sains Bahagian Aar-rifke.com
Soalan Percubaan UPSR 2012 Negeri Melaka Soalan Sains Bahagian A telah di upload di oleh Edu Web SGO di http://www.sistemguruonline.my/2014/11/soalan-trial-upsr-2012-negeri-melaka.html
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Earliest Galaxies in the JADES Origins Field: Luminosity Function and Cosmic ...Sérgio Sacani
We characterize the earliest galaxy population in the JADES Origins Field (JOF), the deepest
imaging field observed with JWST. We make use of the ancillary Hubble optical images (5 filters
spanning 0.4−0.9µm) and novel JWST images with 14 filters spanning 0.8−5µm, including 7 mediumband filters, and reaching total exposure times of up to 46 hours per filter. We combine all our data
at > 2.3µm to construct an ultradeep image, reaching as deep as ≈ 31.4 AB mag in the stack and
30.3-31.0 AB mag (5σ, r = 0.1” circular aperture) in individual filters. We measure photometric
redshifts and use robust selection criteria to identify a sample of eight galaxy candidates at redshifts
z = 11.5 − 15. These objects show compact half-light radii of R1/2 ∼ 50 − 200pc, stellar masses of
M⋆ ∼ 107−108M⊙, and star-formation rates of SFR ∼ 0.1−1 M⊙ yr−1
. Our search finds no candidates
at 15 < z < 20, placing upper limits at these redshifts. We develop a forward modeling approach to
infer the properties of the evolving luminosity function without binning in redshift or luminosity that
marginalizes over the photometric redshift uncertainty of our candidate galaxies and incorporates the
impact of non-detections. We find a z = 12 luminosity function in good agreement with prior results,
and that the luminosity function normalization and UV luminosity density decline by a factor of ∼ 2.5
from z = 12 to z = 14. We discuss the possible implications of our results in the context of theoretical
models for evolution of the dark matter halo mass function.
A brief information about the SCOP protein database used in bioinformatics.
The Structural Classification of Proteins (SCOP) database is a comprehensive and authoritative resource for the structural and evolutionary relationships of proteins. It provides a detailed and curated classification of protein structures, grouping them into families, superfamilies, and folds based on their structural and sequence similarities.
Observation of Io’s Resurfacing via Plume Deposition Using Ground-based Adapt...Sérgio Sacani
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes
on Io’s surface have been monitored from both spacecraft and ground-based telescopes.
Here, we present the highest spatial resolution images of Io ever obtained from a groundbased telescope. These images, acquired by the SHARK-VIS instrument on the Large
Binocular Telescope, show evidence of a major resurfacing event on Io’s trailing hemisphere. When compared to the most recent spacecraft images, the SHARK-VIS images
show that a plume deposit from a powerful eruption at Pillan Patera has covered part
of the long-lived Pele plume deposit. Although this type of resurfacing event may be common on Io, few have been detected due to the rarity of spacecraft visits and the previously low spatial resolution available from Earth-based telescopes. The SHARK-VIS instrument ushers in a new era of high resolution imaging of Io’s surface using adaptive
optics at visible wavelengths.
Deep Behavioral Phenotyping in Systems Neuroscience for Functional Atlasing a...Ana Luísa Pinho
Functional Magnetic Resonance Imaging (fMRI) provides means to characterize brain activations in response to behavior. However, cognitive neuroscience has been limited to group-level effects referring to the performance of specific tasks. To obtain the functional profile of elementary cognitive mechanisms, the combination of brain responses to many tasks is required. Yet, to date, both structural atlases and parcellation-based activations do not fully account for cognitive function and still present several limitations. Further, they do not adapt overall to individual characteristics. In this talk, I will give an account of deep-behavioral phenotyping strategies, namely data-driven methods in large task-fMRI datasets, to optimize functional brain-data collection and improve inference of effects-of-interest related to mental processes. Key to this approach is the employment of fast multi-functional paradigms rich on features that can be well parametrized and, consequently, facilitate the creation of psycho-physiological constructs to be modelled with imaging data. Particular emphasis will be given to music stimuli when studying high-order cognitive mechanisms, due to their ecological nature and quality to enable complex behavior compounded by discrete entities. I will also discuss how deep-behavioral phenotyping and individualized models applied to neuroimaging data can better account for the subject-specific organization of domain-general cognitive systems in the human brain. Finally, the accumulation of functional brain signatures brings the possibility to clarify relationships among tasks and create a univocal link between brain systems and mental functions through: (1) the development of ontologies proposing an organization of cognitive processes; and (2) brain-network taxonomies describing functional specialization. To this end, tools to improve commensurability in cognitive science are necessary, such as public repositories, ontology-based platforms and automated meta-analysis tools. I will thus discuss some brain-atlasing resources currently under development, and their applicability in cognitive as well as clinical neuroscience.
Introduction:
RNA interference (RNAi) or Post-Transcriptional Gene Silencing (PTGS) is an important biological process for modulating eukaryotic gene expression.
It is highly conserved process of posttranscriptional gene silencing by which double stranded RNA (dsRNA) causes sequence-specific degradation of mRNA sequences.
dsRNA-induced gene silencing (RNAi) is reported in a wide range of eukaryotes ranging from worms, insects, mammals and plants.
This process mediates resistance to both endogenous parasitic and exogenous pathogenic nucleic acids, and regulates the expression of protein-coding genes.
What are small ncRNAs?
micro RNA (miRNA)
short interfering RNA (siRNA)
Properties of small non-coding RNA:
Involved in silencing mRNA transcripts.
Called “small” because they are usually only about 21-24 nucleotides long.
Synthesized by first cutting up longer precursor sequences (like the 61nt one that Lee discovered).
Silence an mRNA by base pairing with some sequence on the mRNA.
Discovery of siRNA?
The first small RNA:
In 1993 Rosalind Lee (Victor Ambros lab) was studying a non- coding gene in C. elegans, lin-4, that was involved in silencing of another gene, lin-14, at the appropriate time in the
development of the worm C. elegans.
Two small transcripts of lin-4 (22nt and 61nt) were found to be complementary to a sequence in the 3' UTR of lin-14.
Because lin-4 encoded no protein, she deduced that it must be these transcripts that are causing the silencing by RNA-RNA interactions.
Types of RNAi ( non coding RNA)
MiRNA
Length (23-25 nt)
Trans acting
Binds with target MRNA in mismatch
Translation inhibition
Si RNA
Length 21 nt.
Cis acting
Bind with target Mrna in perfect complementary sequence
Piwi-RNA
Length ; 25 to 36 nt.
Expressed in Germ Cells
Regulates trnasposomes activity
MECHANISM OF RNAI:
First the double-stranded RNA teams up with a protein complex named Dicer, which cuts the long RNA into short pieces.
Then another protein complex called RISC (RNA-induced silencing complex) discards one of the two RNA strands.
The RISC-docked, single-stranded RNA then pairs with the homologous mRNA and destroys it.
THE RISC COMPLEX:
RISC is large(>500kD) RNA multi- protein Binding complex which triggers MRNA degradation in response to MRNA
Unwinding of double stranded Si RNA by ATP independent Helicase
Active component of RISC is Ago proteins( ENDONUCLEASE) which cleave target MRNA.
DICER: endonuclease (RNase Family III)
Argonaute: Central Component of the RNA-Induced Silencing Complex (RISC)
One strand of the dsRNA produced by Dicer is retained in the RISC complex in association with Argonaute
ARGONAUTE PROTEIN :
1.PAZ(PIWI/Argonaute/ Zwille)- Recognition of target MRNA
2.PIWI (p-element induced wimpy Testis)- breaks Phosphodiester bond of mRNA.)RNAse H activity.
MiRNA:
The Double-stranded RNAs are naturally produced in eukaryotic cells during development, and they have a key role in regulating gene expression .
Multi-source connectivity as the driver of solar wind variability in the heli...Sérgio Sacani
The ambient solar wind that flls the heliosphere originates from multiple
sources in the solar corona and is highly structured. It is often described
as high-speed, relatively homogeneous, plasma streams from coronal
holes and slow-speed, highly variable, streams whose source regions are
under debate. A key goal of ESA/NASA’s Solar Orbiter mission is to identify
solar wind sources and understand what drives the complexity seen in the
heliosphere. By combining magnetic feld modelling and spectroscopic
techniques with high-resolution observations and measurements, we show
that the solar wind variability detected in situ by Solar Orbiter in March
2022 is driven by spatio-temporal changes in the magnetic connectivity to
multiple sources in the solar atmosphere. The magnetic feld footpoints
connected to the spacecraft moved from the boundaries of a coronal hole
to one active region (12961) and then across to another region (12957). This
is refected in the in situ measurements, which show the transition from fast
to highly Alfvénic then to slow solar wind that is disrupted by the arrival of
a coronal mass ejection. Our results describe solar wind variability at 0.5 au
but are applicable to near-Earth observatories.
This presentation explores a brief idea about the structural and functional attributes of nucleotides, the structure and function of genetic materials along with the impact of UV rays and pH upon them.
This pdf is about the Schizophrenia.
For more details visit on YouTube; @SELF-EXPLANATORY;
https://www.youtube.com/channel/UCAiarMZDNhe1A3Rnpr_WkzA/videos
Thanks...!
Unveiling the Energy Potential of Marshmallow Deposits.pdf
2013 smk taman mount austin trial science paper 1, paper 2, answer
1. NAMA
KELAS
SMK TAMAN MOUNT AUSTIN
PEPERIKSAAN PERCUBAAN
PENILAIAN MENENGAH RENDAH 2013
SCIENCE
PAPER 1
1 HOUR
JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU
1. Kertas soalan ini adalah dalam dwibahasa
2. Soalan dalam Bahasa Inggeris mendahului soalan yang sepadan dalam Bahasa Melayu
Kertas soalan ini mengandungi 18 halaman bercetak
2. 1 Diagram 1 shows an apparatus.
Rajah 1 menunjukkan sejenis radas.
Diagram 1
Rajah 1
What is the name of this apparatus?
Apakah nama radas tersebut?
A Measuring cylinder
Silinder penyukat
B Flat bottomed flask
Kelalang berdasar bulat
C Gas jar
Balang gas
D Test tube
Tabung uji
2 Diagram 2 shows an animal cell.
Rajah 2 menunjukkan suatu sel haiwan.
Diagram 2
Rajah 2
Which of the following represents J, K, and L?
Antara yang berikut, yang manakah mewakili oleh J, K, dan L?
J K L
A Cell wall
Dinding sel
Cytoplasm
Sitoplasma
Nucleus
Nukleus
B Nucleus
Nukleus
Cell wall
Dinding sel
Cell membrane
Membran sel
C Nucleus
Nukleus
Cytoplasm
Sitoplasma
Cell wall
Dinding sel
D Cell membrane
Membran sel
Nucleus
Nukleus
Cytoplasm
Sitoplasma
3. 3 Diagram 3 shows two balloons P and Q being balanced on a rod.
Rajah 3 menunjukkan dua belon P dan Q diimbang pada sebatang rod.
Diagram 3
Rajah 3
What happens when balloon P is pricked with a pin?
Apakah yang terjadi apabila belon P dicucuk dengan pin?
A The rod tilts to the right.
Rod condong ke kanan.
B Balloon Q becomes smaller.
Belon Q menjadi semakin kecil.
C Balloon Q becomes heavier.
Belon Q menjadi semakin berat.
D The rod tilts to the left.
Rod condong ke kiri.
4 Which of the following is not the basic need of humans?
Yang manakah antara yang berikut bukan keperluan asas manusia?
A Sunlight
Cahaya matahari
B Water
Air
C Soil
Tanah
D Animals
Haiwan
4. 5 Diagram 4 shows the classification of matter.
Rajah 4 menunjukkan pengkelasan jirim.
Diagram 4
Rajah 4
Which of the following represents P and Q?
Yang manakah antara berikut mewakili P dan Q?
Gas P Gas Q
A Oxygen
Oksigen
Carbon dioxide
Karbon dioksida
B Carbon dioxide
Karbon dioksida
Oxygen
Oksigen
C Nitrogen
Nitrogen
Hydrogen
Hidrogen
D Carbon dioxide
Karbon dioksida
Nitrogen
Nitrogen
6 Table 1 shows the properties of an energy.
Jadual 1 menunjukkan ciri-ciri sejenis tenaga.
Cannot be radiated in vacuum.
Tidak dapat dipancarkan melalui
vakum.
Can be reflacted.
Dapat dipantulkan.
Can be transfered by solid, liquid
and gas.
Dapat dipindahkan melalui pepejal,
cecair, dan gas.
Table 1
Jadual 1
The energy is
Tenaga itu ialah
A Electric energy.
Tenaga elektrik.
B Nuclear energy.
Tenaga nuklear.
C Sound energy.
Tenaga bunyi.
D Kinetic energy.
Tenaga kinetik.
5. 7 Diagram 5 shows that different metals expand at different rates.
Rajah 5 menunjukkan logam berlainan mengembang pada kadar berbeza.
Diagram 5
Rajah 5
Which of following shows the correct bending of the bimetallic strip?
Antara yang berikut, yang manakah menunjukkan kepingan dwilogam membengkok dengan betul?
A
B
C
D
8 Which of the following is not a part of the eye?
Yang manakah bukan bahagian pada mata?
A Iris
Iris
B Conjunctiva
Konjuktiva
C Cochlea
Koklea
D Choroid
Koroid
6. 9 When a sample of food containing starch is added with iodine solution,
Apabila satu contoh makanan yang mengandungi kanji ditambahkan dengan larutan iodin,
A a yellowish colour is formed
warna kekuningan terbentuk
B a blue-black colour appears
warna biru tua terhasil
C a green precipitate is formed
mendakan hijau terbentuk
D a purple colour appears
warna ungu terhasil
10 Which of the following substances will be digested by the amylase enzyme?
Antara bahan-bahan berikut, yang manakah akan dicernakan oleh enzim amilase?
A Starch
Kanji
B Mineral salt
Garam mineral
C Protein
Protein
D Fat
Lemak
11 Choose the correct match of animal with its respiratory organ.
Pilih padanan yang betul antara haiwan dan organ pernafasan mereka.
Animal
Haiwan
Respiratory organ
Organ pernafasan
A Toad
Kodok
Lungs
Peparu
B Whale
Ikan paus
Lungs
Peparu
C Snake
Ular
Gills
Insang
D Crocodile
Buaya
Gills
Insang
12 The study of the relationship of the interdependence between organisms with the environment is known
as
Kajian tentang salinghubungan antara organisma dengan alam sekitar dikenali sebagai
A biology
biologi
B community
komuniti
C ecology
ekologi
D habitat
habitat
7. 13 The steps below are carried out to test for the presence of starch in a leaf.
Which of the following sequences is correct?
Langkah-langkah di bawah dijalankan untuk menguji kehadiran kanji dalam daun.
Antara susunan berikut, yang manakah adalah benar?
P − Two drops of iodine are added to the
leaf
Dua titis iodin dititiskan ke atas daun
Q − The leaf is boiled in alcohol
Daun direbus di dalam alkohol
R − The leaf is placed in boiling water for
several minutes
Daun itu diletakkan di dalam air
mendidih untuk beberapa minit
S − The leaf is placed on a white tile
Daun itu diletakkan atas jubin putih
A R, Q, P, S
B R, S, Q, P
C P, S, Q, R
D R, Q, S, P
14 The electrolysis of water shows that water is a
Elektrolisis air menunjukkan bahawa air adalah
A mixture of two types of compound
campuran dua jenis sebatian
B compound containing two parts of hydrogen to one part of oxygen
sebatian yang terdiri dari dua bahagian hidrogen dan satu bahagian oksigen
C compound containing one part of oxygen to one part of hydrogen
Sebatian yang terdiri dari satu bahagian oksigen dan satu bahagian hidrogen
D an element
satu element
15 500 g of sodium chloride was dissolved in 1000 cm3
of water to produce a saturated solution.
What will happen when 50 g of sodium chloride is dissolved in 2000 cm3
of water?
500 g natrium klorida dilarutkan di dalam 1000 cm3
air untuk menghasilkan satu larutan tepu.
Apakah akan berlaku apabila 50 g natrium klorida dilarutkan di dalam 2000 cm3
air?
A A neutral solution is formed
Satu larutan neutral terbentuk
B A clear solution is formed
Satu larutan jernih terbentuk
C An alkaline solution is formed
Satu larutan alkali akan terbentuk
D A dilute solution is formed
Satu larutan cair akan terbentuk
8. 16 Diagram 6 shows an insecticide spray.
Rajah 6 menunjukkan penyembur racun serangga.
Diagram 6
Rajah 6
Which of the following are true when the piston is pushed inwards?
Antara yang berikut, yang manakah benar apabila omboh itu ditolak ke dalam?
I The higher atmospheric pressure pushes air into the can
Tekanan asmosfera yang tinggi menolak udara ke dalam tin
II The air pressure inside the can becomes high
Tekanan udara di dalam tin menjadi tinggi
III The air pressure at the top of the tube becomes low
Tekanan udara di atas tiub menjadi rendah
A I only
I sahaja
B III only
III sahaja
C II and III
II dan III
D I, II and III
I, II, dan III
17 Which of the following is the SI unit for force?
Antara berikut, yang manakah unit SI bagi daya?
A Newton meter
Newton meter
B Newton
Newton
C Watt
Watt
D Kilogram
Kilogram
9. 18 A lift carried three passengers, each with a mass of 75 kg, 60 kg and 50 kg respectively. The lift moved
from the ground to the top floor, through a vertical distance of 15 m.
Calculate the work done by the lift.
(Assume 1 kg = 10 N)
Sebuah lif membawa 3 penumpang, setiap orang mempunyai jisim 75 kg, 60 kg, dan 50 kg masing-masing. Lif itu
bergerak dari bawah ke atas, melalui jarak menegak 15 m.
Kirakan kerja yang dilakukan oleh lif tersebut.
(Anggarkan 1 kg = 10 N)
A 277 500 J
B 27 755 J
C 2 775 J
D 27 750 J
19 Which of the pairs is correct?
Pasangan yang manakah betul?
Animal
Haiwan
Type of skeleton
Jenis Rangka
A Dolphin
Ikan lumba-lumba
Hydrostatic skeleton
Rangka hidrostatik
B Eel
Belut
Exoskeleton
Rangka luar
C Grasshopper
Belalang
Hydrostatic skeleton
Rangka hidrostatik
D Earthworm
Cacing
Exoskeleton
Rangka luar
20 Why does the aquatic vertebrates can grow to very big size compare to land vertebrates?
Mengapakah haiwan vertebrata akuatik boleh membesar sehingga saiz yang sangat besar berbanding haiwan
vertebrata darat?
A The body weight is supported by buoyancy of water
Berat badan disokong oleh daya apungan air
B The skeleton is big
Rangka yang besar
C The body density is low
Ketumpatan badan adalah rendah
D The body weight is supported by pelvic girdle
Berat badan disokong oleh tulang pinggul
21 Which of the following factors affects the position of the centre of the gravity of an object?
Antara berikut, faktor yang manakah mempengaruhi kedudukan pusat graviti sesuatu objek?
A Shape of an object
Bentuk objek
B Size of an object
Saiz objek
C Substance that made up the object
Bahan buatan objek
D Mass of an object
Jisim objek
10. 22 Diagram 7 shows a cupboard that is placed on two blocks M and N.
Rajah 7 menunjukkan sebuah almari yang diletakkan di atas dua blok M dan N.
Diagram 7
Rajah 7
Which of the following can increase the stability of the box?
Antara berikut, yang manakah boleh menambah kestabilan kotak itu?
I Block M and N are brought closer
Blok M dan N dirapatkan
II The distance between M and N is increased
Jarak antara M dan N ditambah
III The height of the bloks M and N are reduced
Ketinggian bongkah M dan N direndahkan
A III only
III sahaja
B I and III
I dan III
C II and III
II dan III
D I, II and III
I, II, dan III
23 Diagram 8 shows a nail being pulled out using tools, R and S.
Rajah 8 menunjukkan satu paku yang ditarik keluar menggunakan alat R dan S.
Diagram 8
Rajah 8
Which of the following is correct?
Yang manakah antara berikut adalah benar?
Tool R
Alat R
Tool S
Alat S
A More force
Daya banyak
More force
Daya banyak
B More force
Daya banyak
Less force
Daya sedikit
C Less force
Daya sedikit
More force
Daya banyak
D No force
Tiada daya
Less force
Daya yang kurang
11. 24 Diagram 9 shows a structure in human lung.
Rajah 9 menunjukkan salah satu struktur dalam peparu manusia.
Diagram 9
Rajah 9
What is the structure?
Apakah struktur ini?
A Bronchiole
Bronkiol
B Diaphragm
Diafragma
C Alveoli
Alveoli
D Bronchus
Bronkus
25 The following statements are related to the transportation of oxygen in the human body.
Penyataan berikut dalah berkaitan dengan pengangkutan oksigen dalam badan manusia.
J: Oxygen dissolve on the surface of
aveoli
Oksigen larut pada permukaan aveoli
K: Oxygen combines with haemoglobin
to form oxyhemoglobin
Oksigen bergabung dengan hemoglobin
untuk membentuk oksihemoglobin
L: Oxyhemoglobin is transported to all
parts of the body
Oksihemoglobin diangkut ke seluruh
bahagian badan
M: Oxyhemoglobin breaks into oxygen
and hemoglobin
Oksihemoglobin diuraikan menjadi
oksigen dan hemoglobin
Which of the following is arranged in the correct sequence?
Mana antara yang berikut disusun mengikut urutan yang betul?
A J → L → M → K
B M → K → J → L
C K → J → M → L
D J → K → L → M
12. 26 Diagram 10 shows a cross-section of a heart.
Rajah 10 menunjukkan keratan rentas jantung.
Diagram 10
Rajah 10
Which of the following represents R and S?
Yang manakah antara berikut mewakili R dan S?
R S
A Vena cava
Vena kava
Pulmonary vein
Vena pulmonari
B Pulmonary vein
Vena pulmonari
Vena cava
Vena kava
C Vena cava
Vena kava
Pulmonary artery
Arteri pulmonari
D Pulmonary artery
Arteri pulmonari
Vena cava
Vena kava
27 Diagram 11 shows the blood circulatory system in the human body.
Rajah 11 menunjukkan sistem peredaran darah dalam badan manusia.
Diagram 11
Rajah 11
Which of the following statements is true?
Antara pernyataan berikut, yang manakah benar?
A L → J → K → M
B J → K → L → M
C M → K → L → J
D J → L → M → K
13. 28 Diagram 12 shows the human urinary system.
Rajah 12 menunjukkan sistem urinari manusia.
Diagram 12
Rajah 12
What is the function of J?
Apakah fungsi J?
A Remove excess glucose from the body
Menyingkirkan glukosa yang lebih dari badan
B Filters the blood which contains waste products
Menapis darah yang mengandungi bahan buangan
C Maintain body temperature
Mengekalkan suhu badan
D Maintains the balance of mineral salts in the body
Mengekalkan keseimbangan garam mineral dalam badan
29 Diagram 13 shows a male reproductive system.
What is the organ that produces sperm?
Rajah 13 menunjukkan sistem pembiakan lelaki.
Apakah organ yang menghasilkan sperma?
Diagram 13
Rajah 13
14. 30 Diagram 14 shows a female reproductive system.
Rajah 14 menunjukkan sistem pembiakan perempuan.
Diagram 14
Rajah 14
Which processes occur in organ P, Q and R?
Apakah proses yang berlaku di organ P, Q, dan R?
P Q R
A Ovulation
Pengovulan
Fertilisation
Persenyawaan
Implantation
Penempelan
B Implantation
Penempelan
Ovulation
Pengovulan
Fertilisation
Persenyawaan
C Fertilisation
Persenyawaan
Ovulation
Pengovulan
Implantation
Penempelan
D Fertilisation
Persenyawaan
Implantation
Penempelan
Ovulation
Pengovulan
31 Which of the following is true about human growth?
Antara yng berikut, yang manakah benar tentang pertumbuhan manusia?
Size
Saiz
Appearance
Rupa bentuk
Mass
Jisim
Organs Function
Fungsi organ
A Dereases
Berkurang
Changes
Berubah
Increase
Bertambah
Changes
Berubah
B Increases
Bertambah
Unchanged
Tidak berubah
Increases
Bertambah
Unchanged
Tidak berubah
C Increases
Bertambah
Changes
Berubah
Increases
Bertambah
Changes
Berubah
D Increases
Bertambah
Changes
Berubah
Increases
Bertambah
Unchanged
Tidak berubah
32 Which of the following minerals is the hardest?
Antara yang berikut, mineral yang manakah paling keras?
A Fluorite
Fluorit
B Diamond
Intan
C Quartz
Kuarza
D Apatite
Apatit
15. 33 Diagram 15 shows the apparatus set-up to investigate the properties of compound P. The gas released
turns the lime water chalky.
Rajah 15 menunjukkan susunan radas untuk menyiasat sifat-sifat sebatian P. Gas yang terbebas menukar air
kapur menjadi keruh.
Diagram 15
Rajah 15
What is compound P?
Apakah sebatian P?
A Silicon dioxide
Silikon dioksida
B Iron oxide
Besi oksida
C Aluminium sulphide
Aluminium sulfida
D Calcium carbonate
Kalsium karbonat
34 Petroleum distillation is a method to refine petroleum.
Which of the following is correct about the product of petroleum distillation?
Penyulingan petroleum merupakan kaedah untuk menapis petroleum.
Antara yang berikut, yang manakah benar tentang hasil penyulingan petroleum itu?
A The higher the boiling point, the lighter its colour.
Semakin tinggi takat didih, semakin cerah warnanya.
B The higher the boiling point, the easier to burn in air.
Semakin tinggi takat didih, semakin senang dibakar di dalam udara.
C The higher the boiling point, the more viscous it gets.
Semakin tinggi takat didih, kelikatan semakin tinggi.
D The higher the boiling point, the less soot is produced.
Semakin tinggi takat didih, semakin sedikit jelaga dihasilkan.
16. 35 Diagram 16 shows a complete circuit.
Rajah 16 menunjukkan satu litar lengkap.
Diagram 16
Rajah 16
Which of the following is the correct combination to measure the resistance of a bulb?
Yang manakah antara berikut adalah kombinasi yang betul untuk mengukur rintangan mentol?
P Q R S
A
B
C
D
36 Diagram 17 shows a complete circuit.
Rajah 17 satu litar lengkap.
Diagram 17
Rajah 17
Which bulb, when burnt out, will prevent all other bulbs from lighting up?
Mentol yang manakah apabila terbakar akan menghalang semua mentol lain menyala?
17. 37 Which of the following characteristic of a step-up transformer is correct?
Antara yang berikut, yang manakah benar tentang ciri-ciri transformer injak naik?
A Output current is smaller than the input current
Arus output adalah lebih rendah daripada arus input
B Output voltage is smaller than the input voltage
Voltan output adalah lebih rendah daripada voltan input
C Number of turns of primary coil is more than that of secondary coil
Bilangan lilitan gegelung primer adalah lebih tinggi berbanding gegelung sekunder
D Raises voltage of alternating current
Meningkatkan voltan arus ulang-alik
38 Diagram 18 shows an electricity transmission and distribution system.
Rajah 18 menunjukkan suatu penghantaran dan pengagihan tenaga elektrik.
Diagram 18
Rajah 18
Which of the following represents P, Q and R?
Manakah antara yang berikut mewakili P, Q, dan R?
P Q R
A Step-up
Injak naik
Step-down
Injak turun
Step-down
Injak turun
B Step-down
Injak turun
Step-down
Injak turun
Step-down
Injak turun
C Step-down
Injak turun
Step-up
Injak naik
Step-up
Injak naik
D Step-up
Injak naik
Step-up
Injak naik
Step-up
Injak naik
39 Which of the following is correct about Milky Way?
Antara yang berikut, yang manakah benar tentang Bima Sakti?
A Sun is located in this galaxy
Matahari terletak di galaksi ini
B It contains thousands of stars
Ia mengandungi beribu-ribu bintang
C It has a elliptical shape
Berbentuk elips
D Its diameter is 2000 light years
Diameternya adalah 2000 tahun cahaya
18. 40 How did Eratosthenes contribute to the study of astronomy?
Bagaimanakah Eratosthenes menyumbang kepada pembelajaran astronomi?
A He proposed that each planet revolved in a small circle.
Dia mencadang setiap planet berputar mengikut bulatan kecil.
B He classified stars based on constellations.
Dia mengelaskan bintang-bintang berdasarkan buruj.
C He proposed Earth was the centre of the universe.
Dia mencadang Bumi sebagai pusat alam semesta.
D He used geometry to estimate the circumference of the Earth.
Dia menggunakan geometri untuk menjangka lilitan Bumi.
ALL THE BEST!!
Disediakan oleh, Disemak oleh, Disahkan oleh,
.................................. .................................... ....................................
(NOOR LIYANA KAMARUDIN) (ROSMIAINI DERAMAN) (AZIZAH AB AZIZ)
Guru Sains Tingkatan 3 Ketua Panitia Sains GK Sains dan Matematik
SMK Taman Mount Austin SMK Taman Mount Austin SMK Taman Mount Austin
19. NAMA
KELAS
SMK TAMAN MOUNT AUSTIN
PEPERIKSAAN PERCUBAAN
PENILAIAN MENENGAH RENDAH 2013
SCIENCE
PAPER 2
1 ½ HOURS
JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU
3. Kertas soalan ini adalah dalam dwibahasa
4. Soalan dalam Bahasa Inggeris mendahului soalan yang sepadan dalam Bahasa Melayu
Bahagian Soalan
Markah
Penuh
Markah
diperoleh
A
1 6
2 6
3 6
4 6
5 8
6 8
B
7 10
8 10
JUMLAH 60
Kertas soalan ini mengandungi 18 halaman bercetak
20. Section A
Bahagian A
[40 marks]
[40 markah]
Answer all question
Jawab semua soalan
The time suggested to answer this section is 60 minutes
Masa yang dicadangkan untuk menjawab bahagian ini ialah 60 minit
1. Diagram 2 shows three animals P, Q and R.
Rajah 2 menunjukkan haiwan P, Q, dan R.
Animal P
Haiwan P
Animal Q
Haiwan Q
Animal R
Haiwan R
Diagram 1
Rajah 1
Exoskeleton
Rangka luar
Hydrostatic skeleton
Rangka hidrostatik
Endoskeleton
Rangka dalam
(a) State the support system for each animal.
Nyatakan system sokongan untuk setiap haiwan.
(i) P:
(ii) Q:
(iii)R:
[3 marks]
[3 markah]
21. (b) Draw lines to match the animal with its characteristics.
Lukiskan garisan untuk memadankan haiwan dengan cirinya.
Animal Characteristic
The weight is supported
mainly by the pectoral girdle.
Berat yang disokong oleh
korset dada
Have hard external structures
for protecting their internal
body organs.
Mempunyai struktur luar
yang kuat untuk melindungi
organ dalaman
The body weight is supported
by the buoyancy of water.
Berat badan disokong oleh
daya apungan air.
Have body fluids to provide
them with shape and support.
Mempunyai cecair badan
yang menjadikan ia
berbentuk dan sokongan.
[3 marks]
[3 markah]
22. 2. Diagram 2(a) below shows a hibiscus plant.
Rajah 2(a) di bawah menunjukkan pokok bunga raya.
Diagram 2 (a)
Rajah 2 (a)
a) Label the structure of the flower above.
Labelkan struktur bunga di atas.
[3 marks]
[3 markah]
b) What is the function of
Apakah fungsi
i. J : ____________________________
ii. L : ____________________________
[2 marks]
[2 markah]
Plant A Diagram 2(b) Plant B
Tumbuhan A Rajah 2(b) Tumbuhan B
c) Name the type of pollination shown in Diagram 2(b)
Namakan jenis pendebungaan yang ditunjukkan dalam Rajah 2(b)
____________________________________________________________________
[1 marks]
J :
L :
K :
23. [1markah]
3. A little sand was mixed with water in a beaker and hydrochloric acid in a test tube
separately. The observation is shown in Table 1.
Sedikit pasir telah dicampurkan dengan air di dalam bikar dan asid hidroklorik di dalam
tabung uji secara berasingan. Pemerhatian ditunjukkan di dalam Jadual 1.
Diagram 3
Rajah 3
Material Observation
Mix sand with water No change
Mix sand with acid hydrochloric No change
Table 1
Jadual 1
a) Based on the Table 1, state two characteristics of silicon
Berdasarkan Jadual 1, nyatakan ciri-ciri silicon
i. _______________________________________
ii. _______________________________________
[2 marks]
[2 markah]
b) Complete the word equation given for the formation of silica
Lengkapkan persamaan perkatan yang diberi untuk pembentukan silika
Silicon
Silikon
+
[2 marks]
[2 markah]
Sand
Pasir
Hydrochloric acid
Asid hidroklorik
Water
Air
24. c) State the usage of silicon compound in our everyday life
Nyatakan kegunaan sebatian silikon di dalam kehidupan seharian kita
i. ________________________________________
ii. ________________________________________
[2 marks]
[2 markah]
4. Diagram 4(a) shows an experiment to determine the product of the combustion of charcoal.
Rajah 4(a) menunjukkan satu eksperimen untuk menentukan hasil pembakaran arang batu.
Diagram 4(a)
Rajah 4(a)
a) i) State the change that occurs to lime water.
Nyatakan perubahan yang berlaku kepada air kapur.
________________________________________________________________
[1 mark]
[1 markah]
ii) State the reason for the change in lime water
Nyatakan alasan atas perubahan di dalam air kapur
_______________________________________________________________
[1 mark]
[1 markah]
25. iii) Based on the experiment write a word equation for the reaction
Berdasarkan eksperimen tersebut tuliskan persamaan perkataan bagi tindakbalas
tersebut.
Charcoal
Arang Batu
+
Oxygen
Oksigen
+ +
Heat energy
Tenaga haba
[2 marks]
[2 markah]
Diagram 4(b)
Rajah 4(b)
b) Diagram 4(b) shows the candles in different container.
Rajah 4(b) menunjukkan lilin yang diletakkan di dalam bekas yang berlainan.
i) Which candle burns longer? Give a reason for your answer.
Lilin manakah yang menyala lama? Berikan alasan bagi jawapan anda.
_______________________________________________________________
_______________________________________________________________
[2 marks]
[2 markah]
26. 5. Diagram 5(a) shows that a part of a leaf closed with a black paper.
Rajah 5(a) menunjukkan bahagian daun yang telah ditutup dengan kertas hitam.
Diagram 5(a)
Rajah 5(a)
a) Which section of the leaf is unable to perform photosynthesis? Give your reason.
Bahagian daun yang manakah tidak dapat menjalankan proses fotosintesis? Berikan
alasan anda.
__________________________________________________________________
__________________________________________________________________
[2 marks]
[2 markah]
b) What is the product of photosynthesis?
Apakah yang hasil oleh fotosintesis?
__________________________________________________________________
[1 mark]
[1 markah]
c) State one factor of photosynthesis
Nyatakan satu faktor fotosintesis
__________________________________________________________________
[1 mark]
[1 markah]
A
B
27. Diagram 5(b)
Rajah 5(b)
d) Diagram 5(b) shows 6 steps to test the present of starch in a leaf.
Rajah 5(b) menunjukkan 6 langkah untuk mengkaji kehadiran kanji di daun.
i. Why the leaf pieces are boiled in alcohol for a few minute?
Mengapakah cebisan daun dididihkan di dalam alkohol beberapa minit?
_______________________________________________________________
[1 mark]
[1 markah]
ii. What can you observed after the iodine test?
Apakah yang dapat anda perhatikan selepas ujian iodine?
_______________________________________________________________
[1 mark]
[1 markah]
iii. Give a reason for the observation above.
Berikan alasan anda bagi pemerhatian di atas.
_______________________________________________________________
[1 mark]
[1 markah]
28. e) How to increase the rate of photosynthesis of mustard plants planted in a closed area?
Bagaimanakah cara untuk meningkatkan kadar fotosintesis pokok sawi yang ditanam di
tempat tertutup?
_______________________________________________________________
[1 mark]
[1 markah]
6. Diagram 6(a) shows an activity to study the effect of smoke from vehicles on living
organisms.
Rajah 6(a) menunjukkan satu aktiviti untuk mengkaji kesan asap daripada kenderaan ke
atas organism hidup.
Diagram 6(a)
Rajah 6(a)
a) i) In which test tube the cockroach is still alive after 2 days?
Lipas di tabung uji manakah yang masih hidup selepas 2 hari?
_______________________________________________________________
[1 mark]
[1 markah]
ii) Give a reason for your answer in a(i)
Berikan alasan untuk jawapan di a(i)
_______________________________________________________________
[1 mark]
29. [1 markah]
Diagram 6(b)
Rajah 6(b)
b) i) State two causes of green house effect.
Nyatakan dua sebab yang menyebabkan kesan rumah hijau.
_______________________________________________________________
_______________________________________________________________
[2 marks]
[2 markah]
ii) State two effects of global warming to human life.
Nyatakan dua kesan terhadap pemanasan global terhadap kehidupan manusia.
_______________________________________________________________
_______________________________________________________________
[2 marks]
[2 markah]
iii) Suggest two ways to control green house effect.
Cadangkan dua cara untuk mengawal kesan rumah hijau.
_______________________________________________________________
_______________________________________________________________
[2 marks]
[2 markah]
30. Section B
[Bahagian B]
[20 marks]
[20 markah]
Answer all question
Jawan semua soalan
The time suggested to answer this section is 30 minutes
Masa yang dicadangkan untuk menjawab bahagian ini ialah 30 minit.
7. Diagram 7(a) shows a simplified diagram of the components in the electricity transmission
and distribution system. Transformer P, Q, R and S are connected to raise or reduce the
voltage supplied in the national network system.
Rajah 7(a) menunjukkan ringkasan komponen system penghantaran dan pengedaran
elektrik. Transformer-transformer P, Q, R dan S disambung untuk meningkatkan atau
mengurangkan voltan yang dibekalkan dalam system rangkaian nasional.
31. a) What is the function of transformer P?
Apakah fungsi transformer P?
_____________________________________________________________________
[1 marks]
[1 markah]
b) Based on your observation in Diagram 7(a) identify the type of transformer represented by
P, Q, R and S.
Berdasarkan pemerhatian anda dalam Rajah 7(a), kenalpasti jenis transformer yang
diwakili oleh P, Q, R dan S
Transformer
Transformer
Type of transformer
Jenis transformer
P
Q
R
S
[4 marks]
[4 markah]
Diagram 7(b)
Rajah 7(b)
32. c) Two transformers were set-up by a student as shown in Diagram 7(b). Both transformers
have the same number of turns in the primary coil. The students observed that the bulb in
Situation A is brighter.
Dua transformer disediakan oleh pelajar seperti dalam Rajah 7(b). Kedua-dua transformer
itu mempunyai bilangan lilitan yang sama dalam gegelung primer. Pelajar itu mendapati
mentol dalam situasi A lebih cerah nyalaannya.
i) What inference can be made based on Diagram 7(b)?
Apakah inference yang boleh dibuat berdasarkan Rajah 7(b)?
_______________________________________________________________
_______________________________________________________________
[1 mark]
[1 markah]
ii) State the variable in this experiment.
Nyatakan pembolehubah di dalam eksperimen ini.
Manipulated variable : _____________________________
Yang dimalarkan
Responding variable : _____________________________
Yang bertindakbalas
[2 marks]
[2 markah]
iii) Based on Diagram 7(b), identify the type of transformer used in Situation A and B
Berdasarkan Rajah 7(b), kenalpasti jenis transformer yang digunakan dalam situasi
A dan B
Situation
Situasi
Type of transformer
Jenis transformer
A
B
[2 marks]
[2 markah]
33. 8. Diagram 8(a) below show some wet clothes hung on a line under different conditions.
Rajah 8(a) menunjukkan beberapa helai pakaian basah dijemur di ampaian di bawah cuaca
yang berbeza.
Diagram 8(a)
Rajah 8(a)
a) i) What inference can be made based on Diagram 8(a)?
Apakah inferens yang boleh dibuat berdasarkan Rajah 8(a)?
________________________________________________________________
________________________________________________________________
[1 mark]
[1 markah]
ii) State the hypothesis for this activity.
Nyatakan hipotesis bagi aktiviti ini.
_______________________________________________________________
_______________________________________________________________
[1 mark]
[1 markah]
34. b) A student carries out an experiment to investigate the situation in Diagram 8(a).
Diagram 8(a) shows the containers used for experiment.
Seorang murid menjalankan eksperimen untuk menyiasat situasi dalam Rajah 8(a).
Rajah 8(a) menunjukkan bekas-bekas yang digunakan dalam eksperimen itu.
Diagram 8(b)
Rajah 8(b)
The student takes the following steps :
Murid itu menjalankan langkah-langkah berikut :
Step 1 : Measure and pour 20cm3
of water into each container.
Langkah 2 : Ukur dan tuangkan 20cm3
air ke dalam setiap bekas.
Step 2 : Keep all the containers in the same place.
Langkah 2 : Letakkan kesemua bekas di tempat yang sama.
Step 3 : Record the time taken for water to evaporate from each container.
Langkah 3 : Rekod masa yang diambil untuk menyejat dari setiap bekas.
35. i) Record the stopwatch reading in the space provided.
Catatkan bacaan jam randik pada ruangan yang disediakan.
Container J
Bekas J
Surface area = 20cm2
Luas permukaan = 20 cm2
Stopwatch reading = 30 minutes
Bacaan jam randik = 30 minit
Container K
Bekas K
Surface area = 80cm2
Luas permukaan = 80cm2
Stopwatch reading = ................ minutes
Bacaan jam randik minit
Container K
Bekas K
Surface area = 140 cm2
Luas permukaan = 140 cm2
Stopwatch reading = ........................
minutes
Bacaan jam randik
minit
36. Complete Table 2 by recording the reading of the stopwatch with the respective container.
Lengkapkan Jadual 2 dengan mencatatkan bacaan jam randik yang sepadan dengan bekas.
Container
Bekas
Time taken to evaporate (minutes)
Masa yang diambil untuk menyejat (minit)
J 30
K
L
[2 marks]
[2 markah]
Table 2
Jadual 2
ii) Based on the data in Table 2, draw a bar chart to show the time taken for water
to evaporate in each container.
Berdasarkan data pada Jadual 2, lukis carta bar untuk menunjukkan masa yang
diambil untuk menyejat dalam setiap bekas.
[2 marks]
[2 markah]
37. c) State the variables involved in this experiment.
Nyatakan pembolehubah yang terlibat dalam eksperimen ini.
Manipulated variable
Pembolehubah dimanipulasi
Responding variable
Pembolehubah bergerakbalas
[2 marks]
[2 markah]
d) Based on Table 2, predict the reading of the stopwatch if container M with a surface
area of 160 cm2
is used.
Berdasarkan Jadual 2, ramalkan bacaan jam randik jika bekas M dengan luas
permukaan 160 cm2
digunakan.
__________________________________________________________________
[1 mark]
[1 markah]
e) Based on the experiment, state the operational definition for the rate of evaporation.
Berdasarkan eksperimen, nyatakan definisi secara operasi bagi kadar penyejatan.
__________________________________________________________________
__________________________________________________________________
[1 mark]
[1 markah]
END OF THE QUESTION PAPER
KERTAS SOALAN TAMAT
Disediakan oleh, Disemak oleh, Disahkan oleh,
............................. ................................. ..............................
(NOOR LIYANA KAMARUDIN) (ROSMIAINI DERAMAN) (AZIZAH AB AZIZ)
GURU SAINS TINGKATAN 3 KETUA PANITIA SAINS GK SAINS & MATEMATIK
38. TRIAL EXAM
SCIENCE PMR 2103
(SKEMA)
PAPER 1
Answer:
1 A 2 D 3 A 4 A 5 A
6 C 7 A 8 C 9 B 10 A
11 B 12 C 13 D 14 B 15 D
16 C 17 B 18 D 19 B 20 A
21 A 22 C 23 C 24 C 25 D
26 A 27 D 28 B 29 D 30 A
31 C 32 B 33 D 34 C 35 D
36 A 37 D 38 A 39 A 40 D
PAPER 2
NUMB
ER
ANSWER MARK
1 a) i. Exoskeleton
ii. Endoskeleton
iii. Hydrostatic skeleton
1
1
1
b)
3
2 a) J : Stigma
K : Style
L : Petal
1
1
1
b) J : Allows the pollen grains to stick to it // receive pollen grain
K : To attract inscet to carry out pollination
1
1
c) Cross-pollination 1
3 a) i. Do not dissolve in water
ii. Do not react with acid
1
1
b) Silicon + oxygen silicon oxide 1
c) i. For making cement/bricks
ii. For making concrete
1
1
39. iii. For making electronic chip
(accept any suitable answer)
4 a) i. Lime water turns cloudy/chalky/milky
ii. Charcoal release carbon dioxide when burnt in oxygen // the presence of
carbon dioxide
iii. Charcoal + oxygen carbon dioxide + light + heat
1
1
1
b) Candle in container B burns longer
Because the larger container contains more oxygen than smaller
container // volume of oxygen inside it is large
1
1
5 a) Section A
Sunlight is needed for photosynthesis
1
1
b) Oxygen // glucose 1
c) Sunlight // Water // Carbon Dioxide // Chloropyll 1
d) i. To remove chloropyhll
ii. The leaf become dark blue
iii. Starch is the product of photosynthesis // starch is present
1
1
1
e) Expose the plant to light 1
6 a) i. Coackroach in boiling tube/test tube P
ii. Because the air inside the boiling tube is clean/ not polluted
1
1
b) i. Excess carbon dioxide in atmophere // Rise Earth’s temperature
ii. Melting of iceberg // The sea level increase // more extreme weather
patterns
iii. Replanting the trees//creating forest reserves//use public transport
(Accept any suitbale answer)
2
2
2
7 a) To increase the voltage // to step up the voltage 1
b) P : step-up
Q : Step-down
R : Step-down
S : Step-down
4
c) i Inference : The bulb in situation A is brighter because the number of
secondary coil is more // the bulb in situation is brighter because the
voltage is higher // vise versa
1
ii Manipulated variable : Number of turns of secondary coil
Responding variable : The brightness of the bulb
1
1
iii A : step-up
B : step-down
1
1
8 a) i. Inference : clothes in condition A dried faster because the weather is
hotter / temperature is higher / light intensity is higher /
Or
Cloth in condition B dried slower beacause the humidity is higher /
temperature is lower
1
ii. Hyphotesis : the higher the temperature the faster the clothes dried //
vice versa
1
40. b) i. K : 20
L : 10
1
1
ii.
3 correct ( 2 marks)
2 correct (1 mark)
1 correct (0 mark)
c) Manipulated : type of container // surface area (of a container)
Respoding : Time taken to evaporate // rate of evaporation // reading of
stopwatch
1
1
d) Any numbers less than 10 (reject 0 and 10 minutes) 1
e) Rate of evaporation shown by the time taken to evaporate // by reading of
stopwatch
1