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55/2Science / SainsPaper 2 / Kertas 2October20071 jam 30 minit

SMK KING EDWARD VII TAIPING

PEPERIKSAAN AKHIR TAHUN

SCIENCE FORM 2PAPER 2

1 HOUR 30 MINUTES[60 marks]

DO NOT OPEN THE QUESTION PAPER UNTIL YOU ARE TOLD TO DO SO

1. This question paper consists of two sections: Section A and Section B.

2. Write your answers in the spaces provided in the question paper.

3. The diagrams in the questions provided are not drawn to scale unless stated

4. Marks allocated for each question or part question are shown in brackets.

5. The time suggested to complete Section A is 60 minutes and Section B is 30

minutes.

6. You may use a non-programmable scientific calculator.

7. Hand in your entire answer sheet at the end of the examination.

Kertas soalan ini mengandungi 12 halaman bercetak.

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Section A

[40 marks]

Answer all questions.The time suggested to answer this section is 60 minutes.

1. Diagram 1 shows the structures of the human skin.

DIAGRAM 1

(a) On Diagram 1, label the structures P, R and S using the following words

Pressure receptors Touch receptor Pain receptors

[3 marks]

(b) State one function of the skin. _____________________________________

[1 mark](c) What are the two factors that influence the sensitivity of the skin?

[i] __________________________________

[ii] __________________________________[2 marks]

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2. Diagram 3 shows a human digestive system.

DIAGRAM 3

(a) Name two of the parts labelled P, Q, R, S, T, U and V.[2 marks]

(b) What is produced by part V?

…………………………………………. [1 mark]

( c) Which part does digestion ends?

…………………………………………[1 mark]

(d) State the function of parts labelled

R………………………………………………………………….

S………………………………………………………………….

U………………………………………………………………….[3 marks]

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3. Diagram 4 shows an experiment on the electrolysis of water.

DIAGRAM 4

(a) Name two elements of water [2 marks]

(b) Define electrolysis. [2 marks]

( c) Based on the above diagram,

(i) what is gas Y? [1 mark]

(ii) What will happen when gas X is tested with a burning wooden splinter? [1 mark]

(iii) What is the ratio of volume of gas X and Y collected at cathode and anode? [1 mark]

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4.

Study the given chart above and answer the question about the daily energy requirement for different individuals.

(a) Which group of individuals need the most energy?

___________________________________[1 mark]

(b) Why does the child require a lot of energy for daily activities?

___________________________________[1 mark]

(c ) List 4 factors that influence a person’s need for energy.

___________________________________

___________________________________

___________________________________

___________________________________[4 marks]

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5.

P Q R S

Identify the special support structures shown in figure above.

(a) Write the names of the support structures shown above.

P ____________________________

Q ____________________________

R ____________________________

S ____________________________ [4 marks]

(b) Name an example of plant that has the same special support structure as S.

__________________________________________________[1 mark]

(c ) Why does the plant P need to have this special support structure ?

___________________________________________________[1 mark]

(d) State the characteristic of the special support structure of plant R

___________________________________________________[1 mark]

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6. Given below are three types of levers, state the class of lever.

(i)

[3 marks](ii) Calculate the distance d if the lever system in figure below is balanced.

(iii) Figure below shows a wheelbarrow with its load weighing 500 newtons. The weight acts at a distance of 0.8 m from the centre of the wheel. What force is needed to lift the handles, which is 1.6 m from the centre of the wheel?

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Calculation:

[2 marks]

Calculation:

[2 marks]

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Section B

[20 marks]Answer all questions

The time suggested to complete this section is 30 minutes

7. Diagram below shows a picture of plant J, K, L and M.

J K L M

(a) Based on your observation, state one characteristic of plants J, K, L and M

J: ______________________________________

K: ______________________________________

L: ______________________________________

M: ______________________________________[4 marks]

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(b) Classify plants J, K, L and M into groups based on common characteristics. Name the plants belonging to each group

[4 marks]

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J, K, L, M

Names of plants

Common characteristics

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8. Diagram below shows the apparatus used by a group of students to investigate frictional forces.

Weights were slowly added to the scale pan until the wooden block just start to move. The total weight required was recorded. The activity was repeated with fine sand and small ball bearings in the tray. The results are shown in table below.

Texture of surface P Q RWeight just to move wooden block 8N 4N 3N

(a) Write a hypothesis for this activity.

________________________________________________________[1 mark]

(b) State the variables

Manipulated variable

Constant variable

Response variable

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[3 marks]

(c ) Define frictional force operationally.

Frictional force is _________________________________________

________________________________________________________[2 marks]

(d ) Draw a bar chart using the data in the table above

[2 marks]

(e) Based on the graph, what is the relationship between manipulated variable and response variable?

__________________________________________________________[1 mark]

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(f) Predict the weight used when the wooden tray is replaced by a piece of cloth.

__________________________________________________________[1 mark]

(g) Give two reasons why we need to reduce frictional force.

__________________________________________________

__________________________________________________[2 marks]

END OF QUESTION PAPER

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