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SULIT 1511/2

1511/2 NAME : …………………………………………….. FORM ………………..

Science

Paper 2

September

2011

2 ½ hours

This question paper consists of 20 printed pages

1511/2 © 2011 Hak Cipta JPNT [Lihat Sebelah

SULIT

SEKOLAH MENENGAH KEBANGSAAN KERTEH

PEPERIKSAAN AKHIR TAHUN

TINGKATAN EMPAT 2011

SCIENCE

Paper 2

Two Hours and Thirty Minutes

DO NOT OPEN THIS TEST PAPER UNTIL YOU ARE TOLD TO DO SO

For Examiner’s Use

Sectio

n

Questio

n

Marks

A

1

2

3

4

B

5

6

7

8

9

C

10

1112

Total

1. This question consists of three sections: Section A

Section B and Section C

2. Answer all questions in Section A and Section B. Write

your answer for Section A and Section B clearly in the

space provided on the question paper

3. For Section C, answer question Question 10 and

choose another Question 11 and Question 12. Write

your answer for Section C on the lined pages provided

at the end of this paper. Answer should be clear and

logical.

4. The marks allocated for each sub-part of a question are

shown in brackets.5. The time suggested to complete Section A is 60 minutes,

Section B is 50 minutes and Section C is 40 minutes.



SULIT 3 1511/2

1511/1 © 2011 Jabatan Pelajaran Negeri Terengganu [ Lihat sebelah

Section A

[20 marks]

Answer all questions in this section.

1. Table 1.1 shows an experiment to study the length of thread and time taken for one

complete oscillation

Length of thread (cm) 5.0 10.0 15.0

Time taken (s) 2 7 10

100g mass were attached at the different length of thread and swing, and the time taken

for one complete oscillation were recorded in the table above.

a) List all the variables involved.

(i) Manipulated variable : …………………………………………………….

(ii) Responding variable : …………………………………………………….

(iii) Constant variable : …………………………………………………….

b) What is the hypothesis?

………………………………………………………………………………………

c) If the length of the thread is increased, predict the time taken for the one complete

oscillation.

………………………………………………………………………………………

d) State the noble values that can be applied in this experiment. Give reasons foryour answer.

…………………………………………………………………………………….

[ 3 mark

[ 1 mark

[ 1 mark

[ 1 mark



SULIT 4 1511/2


2. The diagram below shows an electrolysis experiment for Copper (II) chloride solution

using electrodes X and Y. Copper (II) chloride using electrode X and Y.

a) (i) Anode electrode is represented by ……………………………… .

( ii) Cathode electrode is represented by …………………………….

b) If you wish to electroplate an iron spoon with nickel, what should you use as

(i) Cathode? ………………………………………….

(ii) Anode? ……………………………………………. (iii) Electrolyte? ………………………………………

c) What are the advantages of using metal electroplate?

………………………………………………………………………………….. [ 1 mark]

[ 2 mark]

[ 1 mark]



SULIT 5 1511/2


3. Diagram 3 show three radioactive rays, each with different penetration power.

(a) Name

(i) X : ………………………………

(ii) Y : ………………………………

(iii) Z : ……………………............. …

(b) (i) Which type of radiation is most dangerous?

………………………………………………………………….

(ii) Give one reasons for your answer in (b)(i).

……………………………………………………………………

(c) (i) Name a radioisotope which is used to treat cancer in radiotherapy.

…………………………………………………………………….

X

Y

Z

[ 2 marks]

[ 1 mark]

[ 1 mark]

[ 1 mark]



SULIT 6 1511/2


4. Diagram 4 shows an experiment to study the formation of an image by a concave lens.

Diagram 4

a. Complete Diagram 2 to show the formation of image by the concave lens. Label

the image as I .

b. Measure and write down the distance of the image.

……………………………………………………………………………………..

c. State two characteristics of the image formed in 1(a).

……………………………………………………………………………………

d. What type of lens use in a camera? State two characteristics of image produced by

a camera.

………………………………………………………………………………………

[ 2 mark

[ 1 mark

[ 1 mark

[ 2 mark



SULIT 7 1511/2


Section B

[30 marks]

Answer all questions in this section.

5. Diagram shows an activity that is carried out to study reflex action.

Diagram 5

Student B knocks the knee of student A with hammer.

a) What can be observed?

--------------------------------------------------------------------------------------------------[1mark]

b) Draw an arrow ( ) in diagram to show the direction of his leg

movement.

---------------------------------------------------------------------------------------------------

[1mark]

c) What inference can be made from your observation in 1 (a)?

---------------------------------------------------------------------------------------------------

[1mark]

d) State the operational definition of a reflex action.

---------------------------------------------------------------------------------------------------

[1mark]e) Draw the path of the reflex action.

---------------------------------------------------------------------------------------------------[2mark]



SULIT 8 1511/2


6. Diagram 1 shows the atomic structure of a particular element.

Diagram 6a) Based on diagram 1,

i)

What is the name of this element?

----------------------------------------------------------------------------------------------

[1mark]

ii) What is the nucleon number of this element?

----------------------------------------------------------------------------------------[1mark]

b) Explain why the above atom is said to be neutral?

---------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------

[2 marks]

c) How would this atom become a negative ion?

----------------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------

[2 marks]



SULIT 9 1511/2


7. Radioactive nuclei are unstable, and will eventually break-up or decay. An

unstable nucleus will decay by emitting particles or radiations or both. This

process is a spontaneous process.

(a) Name the process stated above

------------------------------------------------------------------------------------------

[1 mark]

(b) State the types of radioactive radiation emitted from the above process.

------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------

[3 marks]

(c) Compare the characteristics of radioactive radiations in 1(ii).

------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------

[2 marks]



SULIT 10 1511/2


8.

a) Give a definition of an alloy.

--------------------------------------------------------------------------------------------------------

[1 mark]

b) Diagram 8.1 shows atomic arrangement for pure metals while diagram 8.2 shows

atomic arrangement of an alloy. State the differences between those two.

------------------------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------------------

[2 marks]

Diagram 8.3

d) Production of ammonia creates big impact on the chemical industry. All the

pictures above are examples of ammonia based products. List three uses of

ammonia and its compound in daily life.

------------------------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------

[3 marks]

Diagram 8.1 Diagram 8.2



SULIT 11 1511/2


9. Figure 6 shows a cross-breeding between a pea plant with red flowers and a pea

plant with red flowers and a pea plant with white flowers to produce F1 generation plants.

The gene of the red flowers is dominant, while that of the white flowers is recessive.

Pea plant with red flowers Pea plant with whiteflowersParents: X

Gametes:

F1 generation:

Figure 6

a) What type of cell division takes place during the formation of gametes?

……………………………………………………………………………………

b) Complete the schematic diagram in Figure 1 to show the cross-breeding between

the plants.

……………………………………………………………………………………..

c) State the colour of the flowers produced in the F1 generation.

…………………………………………………………………………………….

d) State the parts of the flower that produced the male gamete and the female

gamete.

……………………………………………………………………………………..

e) If the F1 generation plants are cross-bred among themselves, predict the ratio of

the number of plants with red flowers to the number of plants with white flowers

produced.

....................................................................................................................................

M

mm

[ 1 mark]

[ 2 mark]

[ 1 mark]

[ 1 mark]

[ 1 mark



SULIT 12 1511/2


Section C

[20 marks]

Answer Question 10 and either Question 11 or Question 12

Write your answer on pages

The time suggested to answer this section is 40 minutes

10. Study the following statement .

a) Suggest one hypothesis to investigate the above statement.

[1 marks]

b) Describe one experiment that can be carried out in the laboratory to the yourhypothesis in 1(a). Your description should contain the following:

(i) Aim of the experiment.

[1 marks]

(ii) Identification of variables.[2 marks]

(iii) List of apparatus and materials.

[1 marks]

(iv) Procedure.[3 marks]

(v) Tabulation of data.

[1 marks](vi) Conclusion.

[1 marks]

Convex lenses with different thicknesses have

different focal lengths.



SULIT 13 1511/2


11) a) Explain the changes in the body brought upon by both the nervous system andendocrine system when a person faces a frightening incident. [5mark]

b) Drugs can generally be classified as stimulants, depressants and hallucinogens.

Explain the effects of these drugs on body coordination and health. [5marks]

12) We have to realize the need for preservation and conservation of the environment

from the industrial waste pollution for the well being of the mankind. If not so, there will

be negative effects to the environment.

a) Describe the consequences of uncontrolled and haphazard disposal of industrial

waste. [5marks]

b) State and explain the measures need to be taken.

[5marks]

THE END OF QUESTION

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