BIOLOGY

Paper 3 / Kertas 3

This question paper consists of two questions: Question 1 and Question 2. Answer all questions

Kertas soalan ini mengandungi dua soalan: Soalan 1 dan Soalan 2. Jawab semua soalan

An experiment is carried out to determine the energy value in three types of food. Different food

has different amount of energy value. When the food is burning, heat energy is released.

Diagram below shows the apparatus set-up to determine the energy value in three types of food.

Satu eksperimen telah dijalankan untuk mengenal pasti nilai tenaga dalam tiga jenis makanan.

Makanan yang berbeza mengandungi jumlah tenaga yang berbeza. Apabila makanan terbakar,

tenaga haba dibebaskan.

Rajah di bawah menunjukkan susunan radas untuk mengenal pasti nilai tenaga dalam tiga jenis

makanan.

The following steps were carried out:

Langkah-langkah berikut telah dijalankan:

Step 1 Langkah 1

20 ml of distilled water is filled in a boiling tube.

20 ml air suling dimasukkan ke dalam satu tabung didih.

Step 2 Langkah 2

The initial temperature of the water is recorded.

Suhu awal air itu direkodkan.

Step 3 Langkah 3

A cashew nut is weighted and its mass is recorded.

Sebiji kacang gajus ditimbang dan jisimnya direkodkan.

Step 4 Langkah 4

The cashew nut is burnt completely under the boiling tube.

Kacang gajus itu dibakar dengan lengkap di bawah tabung didih.

Step 5 Langkah 5

The final temperature of the water is recorded.

Suhu akhir air itu direkodkan.

Step 6 Langkah 6

Steps 1 to 5 are repeated by using dried bread and dried fish.

Langkah 1 hingga 5 diulangi dengan menggunakan roti kering dan ikan kering.

Table A shows the result of this experiment.

Jadual A menunjukkan keputusan eksperimen ini.

Food sample

Sampel makanan

Cashew nut

Kacang gajus

Dried bread

Roti kering

Dried fish

Ikan kering

Mass of food (g)

Jisim makanan (g) 2 2 2

Volume of distilled water (ml)

Isi padu air suling (ml) 20 20 20

Initial temperature of

distilled water (C)

Suhu awal air suling (C)

30 30 30

Final temperature of

distilled water (C)

Suhu akhir air suling (C)

___________C

__________ C

__________ C

Table A Jadual A

(a) Record the final temperature of distilled water in Table above.

Rekodkan suhu akhir air suling dalam Jadual di atas. [3 markah]

(b) (i) Based on Table A, state two different observations.

Berdasarkan Jadual A, nyatakan dua pemerhatian yang berbeza.

Observation 1:

Pemerhatian 1:

__________________________________________________________________________

__________________________________________________________________________

Observation 2:

Pemerhatian 2:

__________________________________________________________________________

________________________________________________________________________

[3 marks]

[3 markah]

(ii) State the inferences from the observations in (b)(i).

Nyatakan inferens daripada pemerhatian di (b)(i).

Inference from observation 1:

Inferens daripada pemerhatian 1:

__________________________________________________________________________

________________________________________________________________________

Inference from observation 2:

Inferens daripada pemerhatian 2:

__________________________________________________________________________

________________________________________________________________________

[3 marks]

[3 markah]

(c )Complete Table B based on this experiment.

Lengkapkan Jadual B berdasarkan eksperimen ini.

Variable

Pembolehubah

Method to handle the variable

Cara mengendali pembolehubah

Manipulated variable

Pembolehubah dimanipulasikan

Responding variable

Pembolehubah bergerak balas

Constant variable

Pembolehubah dimalarkan

(d) State the hypothesis for this experiment.

Nyatakan hipotesis bagi eksperimen ini.

__________________________________________________________________________

___________________________________________________________________________

[3 marks]

[3 markah]

(e) (i) Construct a table and record all the data collected from this experiment. Your table should

have the following titles:

Bina satu jadual dan rekodkan semua data yang dikumpul dalam eksperimen ini.

Jadual anda hendaklah mengandungi tajuk-tajuk berikut:

Food sample Sampel makanan

Increase in water temperature Kenaikan suhu air

Energy value Nilai tenaga

Energy value

=

Mass of water 4.2 Jg1

C1

temperature

increase Mass of food

Nilai tenaga = Jisim air 4.2 Jg

1 C

1 kenaikan suhu

Jisim makanan

[3 marks]

[3 markah]

(e) (i)

(ii) Use the graph paper provided to answer this question.

Using the data in (e)(i), draw a bar chart to show the energy value of each food sample.

Guna kertas graf yang disediakan untuk menjawab soalan ini.

Dengan menggunakan data di (e)(i), lukis satu carta bar untuk menunjukkan nilai tenaga

bagi setiap sampel makanan.

[3 marks]

[3 markah]

(f) Based on the bar chart drawn in (e)(ii), state the relationship between the food sample

Use and the energy value.

Berdasarkan carta bar yang dilukis di (e)(ii), nyatakan hubungan antara sampel

makanan dengan nilai tenaga.

__________________________________________________________________________

__________________________________________________________________________

[3 marks]

[3 markah]

(g) Based on this experiment, define operationally the energy value of food.

Berdasarkan eksperimen ini, beri definisi secara operasi nilai tenaga makanan.

__________________________________________________________________________

__________________________________________________________________________

[3 marks]

[3 markah]

(h) This experiment is repeated by using 2 g of dried coconut kernel.

Predict the energy value of this food sample. Explain your prediction.

Eksperimen ini diulang dengan menggunakan 2 g isirong kelapa kering.

Ramalkan nilai tenaga dalam sampel makanan ini. Terangkan ramalan anda.

__________________________________________________________________________

__________________________________________________________________________

[3 marks]

[3 markah]

(i) Classify the following food sample according to food classes in Table C.

Kelaskan sampel makanan berikut berdasarkan kelas makanan dalam Jadual C.

Rice

Nasi

Egg white

Putih telur

Butter

Mentega

Fish

Ikan

Prawn

Udang

Sweet potato

Ubi keledek

Corn oil

Minyak jagung

Carbohydrate

Karbohidrat

Protein

Protein

Lipids

Lipid

Table C

Jadual C

[3 marks]

[3 markah]

2.

A housewife made fruit pickles using unripe mango. During the preparation, she placed the

mango slices in water and later placed them in sugar solution.

Seorang suri rumah telah membuat jeruk buah menggunakan mangga muda. Semasa

menyediakan jeruk tersebut, suri rumah itu telah merendam potongan buah mangga dalam

air dan kemudian potongan buah mangga itu direndam pula dalam larutan gula.

When the mango slices were in water, is was found that, the slices became turgid and their

sizes increased.

But when they were placed in the sugar solution, the slices became soft and shrunken.

Semasa potongan mangga direndam dalam air, didapati potongan mangga itu menjadi segah

dan saiznya bertambah. Tetapi apabila potongan mangga itu direndam dalam larutan gula, ia

menjadi lembik dan mengecut.

Based on the above situation, plan a laboratory experiment to determine the concentration of

sucrose which is isotonic to the cell sap of the mango.

Berdasarkan situasi di atas, rancang satu eksperimen di dalam makmal untuk menentukan

kepekatan sukrosa yang isotonik terhadap sap sel mangga itu.

The planning of your experiment must include the following aspects:

Perancangan kerja eksperimen anda perlu meliputi aspek-aspek berikut:

Problem statement Pernyataan masalah

Aim of investigation Objektif kajian

Hypothesis Hipotesis

Variables Pembolehubah

List of apparatus and materials Senarai alat radas dan bahan

Technique used Teknik yang digunakan

Experimental procedure or method Kaedah atau prosedur eksperimen

Presentation of data Cara data dikomunikasikan

Conclusion Kesimpulan

[17 marks]

[17 markah]

Disediakan oleh:

. (Pn. Ismaliza bt. Ishak)

Ketua panitia Biologi

Disemak oleh:

Disahkan oleh: