sains tingkatan 4

Section ABahagian A

[20 marks][20 markah]

Answer all questions in this section.Jawab semua soalan dalam bahagian ini.

1.

A student carries out an experiment to determine the amount of sugar needed to make a saturated sugar solution. He adds 5 grams of sugar into 100 ml of water in a beaker and stirs the solution. He adds another 5 grams of sugar into the water and stirs the solution. He repeats the process until no more sugar can dissolve in the water. Seorang pelajar menjalankan eksperimen bagi menentukan kuantiti gula yang diperlukan untuk membuat larutan gula tepu. Dia menambah 5 gram gula ke dalam bikar berisi 100 ml air dan mengacau larutan itu. Dia menambah 5 gram gula lagi ke dalam air dan terus mengacau larutan. Dia mengulangi proses itu sehingga tiada lagi gula yang dapat larut dalam air.

DIAGRAM/JADUAL

The table below shows the result of the experiment.Jadual di bawah menunjukkan keputusan bagi eksperimen itu.

Amount of sugar (g)

Kuantiti gula (g)

ObservationPemerhatian

5 Sugar dissolves in the water.Gula larut dalam air.




25 Some sugar left in the beaker.Sedikit gula tertinggal dalam bikar.

30 Sugar cannot dissolve any more.Gula langsung tidak larut dalam air.

TABLE/JADUAL

(a)

State a hypothesis for this experiment.Nyatakan hipotesis bagi eksperimen ini.

_____________________________________________________________________________________

[1 mark/markah](b)

State the variables in this experiment.Nyatakan pemboleh ubah dalam eksperimen ini. i. Manipulated variable

pemboleh ubah yang dimanipulasikan

__________________________________________________________________________________

__________________________________________________________________________________

ii. Responding variablepemboleh ubah yang bergerak balas

__________________________________________________________________________________

__________________________________________________________________________________

iii.

Constant variablepemboleh ubah yang dimalarkan

__________________________________________________________________________________

__________________________________________________________________________________

[3 marks/markah](c)

Suggest a method that can be used to increase the solubility of sugar in water.Cadangkan kaedah yang boleh digunakan untuk menambahkan keterlarutan gula dalam air.

_____________________________________________________________________________________

_____________________________________________________________________________________

[1 mark/markah]

2.

Blood tests were taken by all the students of Form 4 Science 1. The results are shown in Table below.Ujian darah diambil oleh semua pelajar dalam kelas Tingkatan 4 Sains 1. Keputusan ditunjukkan dalam Jadual di bawah.

Table / Jadual

(a)

Draw a bar chart for the blood test results.Lukis carta palang bagi keputusan ujian darah.

[3 marks/markah]

(b)

i. Does this bar chart show continuous variation or discontinuous variation?Adakah carta palang ini menunjukkan variasi selanjar atau variasi tak selanjar?

__________________________________________________________________________________

[1 mark/markah]

ii.

Explain your answer.Jelaskan jawapan kamu.

__________________________________________________________________________________

[1 mark/markah]

3.

A student has studied the characteristic of the ability to roll the tongue among students in his class.The observed result is shown in Diagram.Seorang murid telah mengkaji ciri kebolehan menggulung lidah di kalangan murid di dalam kelasnya.Keputusan pemerhatian ditunjukkan dalam Rajah.

DiagramRajah

(a)

Based on Diagram, determine the number of students in each group.Complete Table.Berdasarkan Rajah, tentukan bilangan murid bagi setiap kumpulan.Lengkapkan Jadual.

CharacteristicCiri

Able to roll the tongue

Boleh menggulung lidah

Unable to roll the tongueTidak boleh menggulung

lidah

Number of studentsBilangan murid

TableJadual

[1 mark][1 markah]

(b)

Based on the result in Table, draw a bar chart showing the number of students against the characteristic of the ability to roll the tongue.Berdasarkan keputusan dalam Jadual, lukis carta palang yang menunjukkan bilangan murid melawan ciri kebolehan menggulung lidah.

[2 marks][2 markah]

(c)

State the type of variation based on the bar chart in (b).Nyatakan jenis variasi berdasarkan carta palang di (b).

________________________________________________________________________________________

[1 mark][1 markah]

(d)

In Table, tick (✓) the characteristic which has the same type of variation as in (c).Dalam Jadual, tandakan (✓) bagi ciri yang mempunyai jenis variasi yang sama seperti di (c).

Body weightBerat badan

Type of ear lobesJenis cuping telinga

HeightKetinggian

Blood groupKumpulan darah

TableJadual

[1 mark][1 markah]

4.

The diagram below shows the apparatus of an experiment conducted to determine the melting point of substance X.Rajah di bawah menunjukkan suatu eksperimen yang dijalankan untuk menentukan takat lebur bagi bahan X.

DIAGRAM/RAJAH

The table below shows the result of the experiment.Jadual di bawah menunjukkan keputusan eksperimen itu.

Time (minutes)Masa (minit)

Temperature (°C)Suhu (°C)

0 302 554 706 908 11010 11012 11014 11016 13518 16520 190

TABLE/JADUAL

(a)

State the following variables.Nyatakan pemboleh ubah berikut. i. Manipulated variable

Pemboleh ubah dimanipulasikan

__________________________________________________________________________________

ii. Responding variablePemboleh ubah bergerak balas

__________________________________________________________________________________

iii.

Constant variablePemboleh ubah dimalarkan

__________________________________________________________________________________

[3 marks/markah](b)

Based on the data in the table above, draw a graph of temperature against time. Berdasarkan data dalam jadual di atas, lukiskan graf suhu melawan masa.

[2 mark/markahs]

(c)

Based on the graph in (b), what is the melting point of substance X?Berdasarkan graf di (b), apakah takat lebur bagi bahan X?

__________________________________________________________________________

___________ [1 mark/markah]

(d)

i. State the physical state of substance X between 8 minutes and 14 minutes.Nyatakan keadaan fizikalb ahan X di antara minit 8 dan minit 14.

__________________________________________________________________________________

ii.

Why is the temperature of substance X constant from 8 minutes to 14 minutes?Mengapakah suhu bahan X malar dari minit 8 ke minit 14.

__________________________________________________________________________________

[2 marks/markah]

Section BBahagian B


Answer all questions in this section.Jawab semua soalan dalam bahagian ini.

5.

Diagram below shows the structure of the human brain.Rajah di bawah menunjukkan struktur bagi otak manusia.

DIAGRAM/RAJAH

(a)

(i) State the function of the part labelled L.Nyatakan fungsi bahagian yang berlabel L.

__________________________________________________________________________________

(ii)

What will happen to the person if the part labelled P in his brain is injured?Apakah yang akan berlaku kepada seseorang jika bahagian yang berlabel L dalam otaknya cedera?

__________________________________________________________________________________

[2 marks/markah](b)

Which part of the brain controls...Bahagian otak manakah yang mengawal… (i) voluntary actions?

tindakan terkawal?

__________________________________________________________________________________

(ii)

involuntary actions?tindakan luar kawal?

__________________________________________________________________________________

[2 marks/markah](c)

Why do the cerebrum and cerebellum of the brain have folded parts?Mengapakah serebrum dan serebelum otak mempunyai bahagian berlipat-lipat?

_____________________________________________________________________________________

[1 mark/markah](d)

What is the advantage of having grey matter on the surface of the brain?Apakah kelebihan mempunyai jirim kelabu pada permukaan otak?

_____________________________________________________________________________________

[1 mark/markah]

6.

The diagram below shows two cells undergoing cell division. The two cells are taken from different parts of the same organism.Rajah di bawah menunjukkan dua sel yang menjalani pembahagian sel. Kedua-dua sel itu diambil daripada bahagian-bahagian yang berlainan dalam satu organism.

DIAGRAM/RAJAH

(a)

Name the following processes.Namakan proses-proses berikut. i. Process P

Proses P

__________________________________________________________________________________

ii.

Process QProses Q

__________________________________________________________________________________

[2 marks/markah](b)

How many daughter cells are produced in...Berapa banyakkah sel anak yang dihasilkan dalam … i. process P?

Proses P?

__________________________________________________________________________________

ii.

process Q?Proses Q?

__________________________________________________________________________________

[2 marks/markah](c)

Give one importance of cell division by process P and process Q.Beri satu kepentingan pembahagian sel melalui proses P dan proses Q. i. Process P

Proses P

__________________________________________________________________________________

ii.

Process QProses Q

__________________________________________________________________________________

[2 marks/markah](d)

What is the similarity between these two types of cell division?Apakah persamaan antara dua jenis pembahagian sel ini?

_____________________________________________________________________________________

[1 mark/markah]

7.

Diagram below shows the structure of the boron atom.Rajah di bawah menunjukkan struktur atom boron.

Diagram /Rajah

(a)

Name the subatomic particles labelled U and V.Namakan zarah subatom yang berlabel U dan V.

U:

__________________________________________________________________________________

V:

__________________________________________________________________________________

[2 marks/2 markah]

(b)

State the proton number and nucleon number of boron.Nyatakan nombor proton dan nombor nukleon bagi boron.

Proton number:Nombor proton:

_____________________________________________________________________________________

Nucleon number:Nombor nukleon:

_____________________________________________________________________________________

[2 marks/2 markah]

(c What are isotopes?

) Apakah isotop?

_____________________________________________________________________________________

[1 mark/1 markah]

8.

The diagram below shows a blast furnace which can be used to produce a metal from haematite.Rajah di bawah menunjukkan sebuah relau bagas yang boleh digunakan untuk menghasilkan suatu logam daripada hematit.

DIAGRAM/RAJAH

(a)

Haematite and two other materials are added to the top of the furnace. What are the two other materials added?Hematit dan dua logam lain ditambah di atas relau. Apakah dua logam lain yang ditambah itu?

_____________________________________________________________________________________

[2 marks/2 markah](b)

Hot gas is blasted into the lower part of the furnace. What is the gas?Gas panas diledakkan ke dalam bahagian lebih bawah relau itu. Apakah gas itu?

_____________________________________________________________________________________

[1 mark/1 markah](c)

Two products are extracted at the base of the furnace. What are they?Dua produk diekstrakkan di bahagian dasar relau. Apakah produk-produk itu?

Product 1: __________________________________________________________________________

__Produk 1:

Product 2:____________________________________________________________________________Produk 2:

[2 marks/2 markah](d)

State one other metal that can be extracted from its ore using a blast furnace.Nyatakan satu logam lain yang boleh diekstrakkan dari bijihnya menggunakan sebuah relau bagas.

_____________________________________________________________________________________

[1 mark/1 markah]

9.

Diagram shows the atmospheric layer around the Earth.Rajah menunjukkan lapisan atmosfera di sekeliling Bumi.

DiagramRajah

(a)

(i)What is layer T?Apakah lapisan T?

_____________________________________________________________________________________

[1 mark][1 markah]

(ii)

State the importance of layer T.Nyatakan kepentingan lapisan T.

_____________________________________________________________________________________

[1 mark][1 markah]

(b)

(i)Name the substance which can damage layer T.Namakan bahan yang boleh memusnahkan lapisan T.

_____________________________________________________________________________________

[1 mark][1 markah]

(ii)

Name one appliance that releases the substance in (b)(i).Namakan satu alat yang membebaskan bahan di (b)(i).

_____________________________________________________________________________________

[1 mark][1 markah]

(c)

State two effects if layer T is damaged.Nyatakan dua kesan jika lapisan T termusnah.

1. _____________________________________________________________________________________

2. _____________________________________________________________________________________

[2 marks][2 markah]

Section CBahagian C


Answer Question 10 and either Question 11 or Question 12.Jawab Soalan 10 dan sama ada Soalan 11 atau Soalan 12.

10. Study the following statement.Kaji penyataan berikut.

A blind-folded student can estimate the relative masses of objects.Seorang pelajar yang ditutup matanya boleh menganggar jisim relatif objek.

(a) Using five loads of different masses, suggest a hypothesis to study the above statement.Dengan menggunakan lima beban yang berlainan jisim, cadangkan hipotesis bagi mengkaji penyataan di atas.

[1 mark/markah](b) Explain an experiment to test the hypothesis using the following details.

Huraikankan satu eksperimen untuk menguji hipotesis itu dengan menggunakan maklumat berikut. • Problem statement

Penyataan masalah [1 mark/markah]

• Aim of the experimentTujuan eksperimen

[1 mark/markah]• List of apparatus

Senarai radas [1 mark/markah]

• ProcedureProsedur

[4 marks/markah]• Data presentation

Persembahan data [1 mark/markah]

• ConclusionKesimpulan

[1 mark/markah]

11. Study the following statement.Kaji maklumat berikut.

(a) Suggest a hypothesis to study the above statement.

Cadangkan satu hipotesis untuk mengkaji penyataan di atas. [1 mark/1 markah]

(b) Describe an experiment to test your hypothesis according to the following criteria.

Huraikan satu eksperimen untuk menguji hipotesis kamu berdasarkan kriteria yang berikut.

i. Aim of the experimentTujuan eksperimen

[1 mark/1 markah]ii. Apparatus

Radas [1 mark/1 markah]

iii. ProcedureProsedur

[3 marks/3 markah]iv. Presentation of data

Penjadualan data [3 marks/3 markah]

v. ConclusionKesimpulan

[1 mark/1 markah]

12. (a) Diagram belowshows a variety of substances.Rajah di bawah menunjukkan pelbagai bahan.

Diagram /Rajah

Discuss the differences between these substances based on the following characteristics.Bincangkan perbezaan di antara bahan-bahan ini berdasarkan ciri-ciri yang berikut.(i) The physical state at room temperature

Sifat fizikal pada suhu bilik [2 marks/markah]

(ii) The melting point

Takat lebur [2 marks/markah]

(iii)

The boiling pointTakat didih

[2 marks/markah]

(iv)The electrical conductivityKekonduksian elektrik

[2 marks/markah]

(b) State two differences between a metal and a non-metal.Nyatakan dua perbezaan antara logam dengan bukan logam.

[2 marks/markah]

sains tingkatan 4

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