Nama:_____________________________________ Tingkatan:______________

SMJK HENG EE, PULAU PINANGPEPERIKSAAN 1B/2013

SCIENCEPAPER 2

TINGKATAN TIGATarikh : 17-5-2013( Jumaat ) Disediakan oleh : En. Chong K.HMasa : 11.00pg – 12.30tgh (1 jam 30 minit ) Disemak oleh : Pn. Lee Li Kean

Pn. Yap Cheng Keaw (Language)

Instruction:This paper consists of 2 sections, Section A and Section B. Answers all questions in the spaces provided.

Section A[ 40 Marks ]

The time suggested to answer this section is 60 minutes.

1. Diagram 1.1 shows the structure of the human heart. [ 6 marks ]

Diagram 1.1 a) On Diagram 1.1, label the part X, Y and Z using the following words.

[ 3 marks ]

b) State the function of the part labeled Z.

___________________________________________________________________________________ [ 1 mark ]

c) Diagram 1.2 shows the cross section of the blood vessels P, Q and R.

P Q R

Diagram 1.21

Pulmonary artery Pulmonary vein Aorta Vena cava

Which blood vessel has no valves? Explain your answer.

____________________________________________________________________________________ [ 2

mark ]

2. Diagram 2.1 shows different form of resources on earth. [ 6 marks ]

Diagram 2.1a) State whether the J and K are elements or mixtures.

J : ____________________________

K : ____________________________ [ 2

marks ]

b) Diagram 2.2 shows a compound commonly found on our Earth.

Diagram 2.2

i) Name the compound as shown in Diagram 2.2.

_________________________________________________________________________________

ii) How do you recognize the compound ?

_________________________________________________________________________________

iii) Name one method that can be used to break down this compound into its elements.

_________________________________________________________________________________ [ 3

marks ]

c) The steps below are used to separate a mixture of three different materials: iron powder, sand and common salt crystals.

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P – Dissolving in water.Q – Using a magnet.R – EvaporatingS – Filtrating

State the correct sequence of steps to separate the three substances.

____________________________________________________________________________________ [ 1

mark ]

3. Diagram 3 shows the apparatus used in electrolysis of water. [ 6 marks ]

Diagram 3

a) Suggest one example of Z.

____________________________________________________________________________________ [ 1

mark ]

b) Which of the carbon rod functions as positive electrode / anode ?

____________________________________________________________________________________ [ 1

mark ]

c) When the circuit is turned on, some gas is collected in each test tube.i) What are the gas that collected in test tube P and Q respectively?

P : ________________________________

Q : ________________________________ [ 2

marks ]

ii) Suggest one way to identify the gas collected in test tube P

____________________________________________________________________________________________ [ 1

mark ]

d) State the expected ratio of the volume of the gas collected in test tube Q to the volume of gas collected

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in test tube P.

____________________________________________________________________________________ [ 1

mark ]

4. Diagram 4 shows a device that applied the principle of air pressure. [ 6 marks ]

Diagram 4a) State the name of the device shown in Diagram 4.

___________________________________________________________________________________ [ 1 mark ]

b) State one uses of the device shown in Diagram 4.____________________________________________________________________________________

[ 1 mark ]

c) What will happen to the air pressure in the cylinder, when the piston pushed inwards?

____________________________________________________________________________________ [ 1

mark ]

d) State the inference for the answer in (c).

____________________________________________________________________________________

____________________________________________________________________________________ [ 1

mark ]

e) What will happen to the air pressure at P when the piston is pushed inwards?

____________________________________________________________________________________ [ 1

mark ]

f) Based on Diagram 4, what will happens if there is a hole at point Q?4

____________________________________________________________________________________ [ 1

mark ]

5. Diagram 5 shows a process occurs in female reproductive organ. [ 8 marks ]

Diagram 5a) Name the process in Diagram 5.

____________________________________________________________________________________ [ 1

mark ]

b) Where does the process mentioned in (a) take place?

____________________________________________________________________________________ [ 1

mark ]

c) Name the cells that are labeled as P and Q.

P : ______________________________________

Q: ______________________________________ [ 2 marks ]

d) What is formed after the process mentioned in (a) take place?

____________________________________________________________________________________ [ 1

mark ]

e) What will happen to cell Q if it is not fertilised by cell P after 24 hours?

____________________________________________________________________________________ [ 1

mark ]

f) If a married couple does not stable in terms of their financial status and only plan to have their own child after several years, please suggest one contraceptive method which suitable to be used in their situation.

____________________________________________________________________________________ [ 1

mark ]

g) If the husband of the married couple in (e) has infertility problem of low sperm count after diagnosed by specialist, please suggest one solution assume that you are a fertility specialist.

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____________________________________________________________________________________ [ 1

mark ]

6. Diagram 6 shows a model of human respiratory system. [ 8 marks ]

Diagram 6

a) Name the respiratory organs that are represented by the(i) Y-shaped glass tube : __________________________________________________________

(ii) Balloons : __________________________________________________________

(iii) Rubber sheet : __________________________________________________________

(iv) Bell jar : __________________________________________________________ [ 4 marks ]

b) Predict what will happen to the air pressure in the bell jar when (i) The rubber sheet is pulled downwards.

________________________________________________________________________________

(ii) The rubber sheet is pushed upwards.

________________________________________________________________________________ [ 2

marks ]

c) Based on the answer in b(i) and b(ii), state the relationship between the air pressure in the bell jar to the volume of bell jar.

____________________________________________________________________________________ [ 1

mark ]

d) Name the breathing process that takes place when the rubber sheet is pulled downwards.

____________________________________________________________________________________ [ 1

mark ]

Section B[ 20 marks ]

The time suggested to answer this section is 30 minutes.

7. Diagram 7.1 shows four types of plants P, Q, R and S. [ 10 marks ]

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Diagram 7.1a) Based on your observation, state the types of support system in plants P, Q, R and S.

P :_____________________________________

Q :_____________________________________

R :_____________________________________

S :_____________________________________ [ 4

marks ]

b) Classify the P, Q, R and S into two group based on their support system.

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[ 4 marks ]

c) Diagram 7.2 shows a type of aquatic plant in two different situations.

Diagram 7.2

(i) Based on your observation in Diagram 7.2, state one inference about the condition of the plant.

_____________________________________________________________________________

_____________________________________________________________________________ [ 1

mark ]

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(ii) Predict what will happen to the plant in situation B if the plasticine is removed.

______________________________________________________________________________ [ 1

mark ]

8. Diagram 8 shows a set up of an experiment to study the conditions required for seeds germination.

Diagram 8

The test tubes A, B, C and D are put in the laboratory and the test tube D is put in a refrigerator. The above apparatus is left for three days.

a) State the variables in this experiment.

(i) Manipulated variable : __________________________________________________________

(ii) Responding variable : __________________________________________________________

(iii) Constant variable : __________________________________________________________ [ 3

marks ]

b) Write down the observation for the following set after left for three days.

(i) A : __________________________________________________________________________

(ii) B : __________________________________________________________________________

(iii) C : __________________________________________________________________________

(iv) D : __________________________________________________________________________ [ 4

marks ]

c) State on purpose of using(i) oil in test tube B,

_____________________________________________________________________________ [ 1

mark ](ii) cooled boiled water in test tube B,

_____________________________________________________________________________ [ 1

mark ]

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d) What should be done so that the seeds in test tube A germinate?

_________________________________________________________________________________ [ 1

mark ]

e) What is the conclusion of this experiment?

_________________________________________________________________________________

_________________________________________________________________________________ [ 1

mark ]

END OF QUESTIONS PAPER

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