MODEL SOALAN PT3

UJIAN BERTULIS 2 jam

NAMA: …………………………………………………………………………

ANGKA GILIRAN:

55

SMK BUKIT RAHMAN PUTRA

Science

Arahan

1. Kertas ini boleh dibuka apabila diberitahu.

2. Tulis nama dan angka giliran anda di ruang yang disediakan.

3. Tulis jawapan anda di ruang jawapan yang disediakan dalam kertas soalan ini.

4. Serahkan kertas soalan ini kepada pengawas peperiksaan pada akhir peperiksaan.

Kegunaan PemeriksaNama Pemeriksa:

Soalan Markah Penuh

Markah Diperoleh Soalan Markah

PenuhMarkah

Diperoleh1 6 8 62 6 9 63 6 10 64 6 11 105 6 12 106 6 13 107 6 14 10

Jumlah

Jawab semua soalan.Answer all the questions.

1 The diagram below shows some measuring tools.Rajah di bawah menunjukkan beberapa alat pengukuran.

K L M

(a) Match the measuring tools with their names. Padankan alat pengukuran di atas dengan namanya.

[3 marks][3 markah]

Measuring toolsAlat pengukuran

NamesNama

Triple beam balanceNeraca tiga alur

Internal calipersAngkup dalam

(i) K

(ii) L

(iii) M Spring balanceNeraca spring

(b) Identify the measuring tools based on the following statements. Kenal pasti alat pengukuran berdasarkan pernyataan yang berikut.

(i) This tool is used to measure the weight of an object. Alat ini digunakan untuk mengukur berat objek. K

(ii) This tool is used to measure the mass of an object. Alat ini digunakan untuk mengukur jisim objek. L(iii) This tool is used to measure the internal diameter of an object. Alat ini digunakan untuk mengukur diameter dalam objek.

M

[3 marks][3 markah]

2 (a) (i) The diagram below shows a phenomenon that occurs in coastal areas. Put a tick ( ) the correct direction of the convection current and a cross ( ✗ ) the wrong direction of the convection current.Rajah di bawah menunjukkan satu fenomena yang berlaku di kawasan pantai.Tandakan ( ) bagi arah arus perolakan yang betul dan (✗ ) bagi arah arus perolakan yang salah.

[2 mark][2 markah]

(ii) The heat transfer occurs in a sea breeze. Are the processes of conduction, convection or radiation occur in the formation of sea breeze? Write Yes or No in the boxes provided.

✗

sealaut

Sun Matahari

landdarat

Pengaliran haba berlaku dalam bayu laut. Adakah proses konduksi, perolakan atau sinaran berlaku dalam pembentukan bayu laut? Tulis Ya atau Tidak dalam petak yang disediakan.

ConductionKonduksi

ConvectionPerolakan

RadiationSinaran

[3 marks][3 markah]

(b) The diagram below shows the land breeze that takes place during night time. Rajah di bawah menunjukkan bayu darat yang berlaku pada waktu malam.

Write True or False for the following statements based on the diagram shown above.Tulis Benar atau Palsu bagi pernyataan berikut berdasarkan rajah di atas.

(i) At P, the sea is warmer than the land and the warm air over the ocean rises. Di P, laut lebih panas daripada darat dan udara panas di atas laut naik ke atas.

TRUE

(ii) At Q, the land gets warm faster than the sea and the warm air flows out from land to sea. Di Q, darat menjadi panas lebih cepat daripada laut dan udara panas dari darat bergerak ke arah laut.

FALSE

[1 mark][1 markah]

YA

YA

TIDAK

landdarat

sea laut

MoonBulan

PQ

3 (a) (i) The diagram below shows the carbon cycle. Put a tick () for a correct process and a cross () for a wrong process. Rajah di bawah menunjukkan satu kitar karbon. Tandakan () bagi proses yang betul dan pangkah () bagi proses yang salah.

[2 marks][2 markah]

(ii) Do the processes of decay and photosynthesis use oxygen? Write Yes or No in the boxes provided. Adakah proses pereputan dan fotosintesis menggunakan oksigen? Tulis Ya atau Tidak dalam petak yang disediakan.

Decaying PhotosynthesisPereputan Fotosintesis

[2 marks][2 markah]

(b) The green plant and the goat are involved in a food chain in nature. Write True or False for the statements in the table below.Tumbuhan hijau dan kambing terlibat dalam suatu rantai makanan dalam alam semula jadi. Tulis Benar atau Palsu bagi pernyataan dalam jadual di bawah.

The goat is a secondary consumerKambing ialah pengguna sekunder

FALSE

The green plant is a producerTumbuhan hijau ialah pengeluar

TRUE

[2 marks][2 markah]

4 Breathing is the process by which air is drawn into and out of the human body. The two pie charts inthe diagram below shows the compositions of inhaled and exhaled air.Pernafasan ialah proses di mana udara disedut dan dihembus daripada badan manusia. Rajah di

PhotosynthesisFotosintesis

Decaying Pereputan

Respiration Respirasi

Combustion

Pembakaran

YES

Carbon dioxideKarbon dioksida

NO

bawah menunjukkan dua carta pai yang menunjukkan komposisi udara di dalam udara sedutan danudara hembusan nafas.

(a) (i) Which pie charts represents the… Carta pai yang manakah mewakili…

inhale air : _________________PIE CHART B_________________udara sedutan

exhale air : __________________PIE CHART A________________udara hembusan

[2 marks][2 markah]

(ii) Is there any difference in the amount of nitrogen in the air during inhalation and exhalation? Explain your answer.Adakah terdapat sebarang perbezaan dalam jumlah bagi nitrogen semasa tarikan danhembusan nafas? Terangkan jawapan anda.

_no,because our body doesn't need nitrogen

____________________________________________________________________

_________________________________________________________________________

[2 marks] [2 markah]

(b) Breathing involves the repeated processes of inhalation and exhalation. Name two organs which play important roles in the breathing mechanism.Pernafasan melibatkan proses penarikan dan penghembusan nafas yang berselang-seli. Nyatakan dua organ yang memainkan peranan penting dalam mekanisme pernafasan.

____nose and lungs

________________________________________________________________________ [2 marks]

[2 markah]

5 A group of students found that the level of water pollution in the area they are living in has reached acritical point. Due to human activities, waste matter from industrial and domestic sources which are

nitrogennitrogen

oxygenoksigen

carbon dioxidekarbon dioksida

dissolved or suspended in water contributes to the deterioration of the water quality. The waterquality is tested by using methylene blue solution. The shorter the time taken for the methylene blue solution to turn clear, the less dissolved oxygen there is. Hence, the water is contaminated.

Sekumpulan pelajar mendapati bahawa tahap pencemaran air di kawasan tempat tinggal merekatelah mencapai tahap kritikal. Mereka telah menjalankan suatu eksperimen untuk menyiasat tahappencemaran di dalam air dari sumber-sumber yang berbeza. Tahap pencemaran air diuji denganmenggunakan larutan metilena biru. Semakin singkat masa yang diambil untuk larutan metilena birubertukar menjadi jernih, semakin kurang kandungan oksigen terlarut. Maka semakin tercemar air itu.

The following is the procedures of the investigation.Berikut ialah prosedur bagi penyiasatan itu.

(i) Water samples from three different sources of water (tap, river and well) are collected.Sampel air daripada tiga sumber yang berbeza (air pili, sungai dan telaga) dikumpulkan.

(ii) The water samples are poured into three separate reagent bottles.Sampel-sampel air dimasukkan ke dalam tiga botol reagen yang berbeza.

(iii) 1 ml of methylene blue solution is added into each sample by using a syringe.1 ml larutan metilena biru dimasukkan ke dalam setiap botol menggunakan picagari.

(iv) The reagent bottles are closed with stoppers and placed in a dark cupboard.Botol reagent ditutup dengan penutup dan diletakkan pada keadaan gelap dalam sebuah almari.

(v) The colour of the solution in each bottle is observed every hour.Warna larutan dalam botol diperhatikan setiap satu jam.

(vi) The time taken for each water sample to turn colourless is recorded.Masa yang diambil bagi warna sampel air menjadi luntur dicatatkan.

(a) The table below shows the results of the experiment.Jadual di bawah menunjukkan keputusan eksperimen tersebut.

Source of water sample

Sumber sampel air

Time taken for the methylene blue solution to be decolourised/hours

Masa yang diambil bagi larutan metilena biru menjadi luntur/jam

Tap waterAir pili

7 hours7 jam

Well waterAir perigi

3 hours3 jam

River waterAir sungai

1 hour1 jam

(i) Based on the above table, which water is polluted?Berdasarkan jadual di atas, air yang manakah tercemar?

_________air sungai__________________________________________________________

___________________________________________________________________

___________________________________________________________________[1 mark]

[1 markah]

(ii) It is important to have a source of good drinking water. Water found underground is referred to as ground water.Sumber air minuman yang baik merupakan suatu yang penting. Air yang terdapat di bawah tanah dikenal sebagai air bumi.

Give reasons why there is less pollution by bacteria and particles in ground water than in water from surface sources such as lakes and rivers. Berikan sebab mengapa air bawah tanah kurang pencemaran oleh bakteria dan zarah berbanding dengan air dari sumber permukaan seperti tasik dan sungai.

__ground water is filled with minerals and the water is not exposed to the pollution

_________________________________________________________________

___________________________________________________________________

___________________________________________________________________

___________________________________________________________________

___________________________________________________________________[2 marks]

[2 markah]

(b) The chart below shows the factors of water pollution occurring in the investigation.Carta di bawah menunjukkan faktor-faktor pencemaran air yang berlaku di kawasan penyiasatantersebut.

Describe how these factors of water pollution can affect living things.Terangkan bagaimana faktor-faktor pencemaran air ini boleh memberi kesan ke atas benda-benda hidup.

1.domestic waste like plastic ,aluminium can & tin contain high amount of chemical .and when this

waste is throw in the water sources .the water gets polluted by the chemical in the waste.

2. Nitrogen from fertilizers, manure, waste and ammonia turns into nitrite and nitrate.Nitrate combines

with the water.This will poison the aquatic creatures and end up killing the animals,fish.plants.

3. Industrial waste like oil can’t dissolve in water. This can stop marine plants receiving enough light for photosynthesis.the aquatic animals will not get enough oxygen and die and oil get stuck to the feathers of seabirds causing them to lose their ability to fly.______________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

_______________________________________________________________________

[3 marks][3 markah]

(c) Diagram shows two agricultural activities which use chemical products.Rajah menunjukkan dua aktiviti pertanian yang menggunakan produk bahan kimia.

Spreading fertilizersMenabur baja

Spraying insecticidesMenyembur racun serangga

Discuss the good and bad effects of both activities shown in the above diagram. The discussion should be based on the impact on agriculture and enviroment.Bincangkan kesan baik dan kesan buruk kedua-dua aktiviti yang ditunjukkan pada rajah di atas.Perbincangan harus berdasarkan kesan pada pertanian dan alam sekitar.

menabur baja

Baik crops will grow faster

buruk Excess nitrogen from fertilisers gets into water supplies, causing fish to die.

_______________________________________________________________________

Menyembur racun serangga

Baik kill pests faster than other pest control methods.

Buruk kill benefical insects like bee [4 marks]

[4 markah]