Structured Questions Science Form 2

SULIT

Nama: ___________________________ Tingkatan: ________________

55/2

55/2 Science / Sains Paper 2 / Kertas 2 October 2007 1 jam 30 minit

SMK KING EDWARD VII TAIPING PEPERIKSAAN AKHIR TAHUN SCIENCE FORM 2 PAPER 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.

SULIT 55/2

1

SULIT

Nama: ___________________________ Tingkatan: ________________

55/2

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]

SULIT 55/2

2

SULIT

Nama: ___________________________ Tingkatan: ________________

55/2

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]

SULIT 55/2

3

SULIT

Nama: ___________________________ Tingkatan: ________________

55/2

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]

SULIT 55/2

4

SULIT

Nama: ___________________________ Tingkatan: ________________

55/2

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]

SULIT 55/2

5

SULIT

Nama: ___________________________ Tingkatan: ________________

55/2

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]

SULIT 55/2

6

SULIT

Nama: ___________________________ Tingkatan: ________________

55/2

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. Calculation:

[2 marks] (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? Calculation:

[2 marks] Section B SULIT 55/2

7

SULIT

Nama: ___________________________ Tingkatan: ________________

55/2

[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]

SULIT 55/2

8

SULIT

Nama: ___________________________ Tingkatan: ________________

55/2

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

J, K, L, M Common characteristics

Names of plants

[4 marks]

SULIT 55/2

9

SULIT

Nama: ___________________________ Tingkatan: ________________

55/2

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 Weight just to move wooden block

P 8N

Q 4N

R 3N

(a) Write a hypothesis for this activity. ________________________________________________________ [1 mark] (b) State the variables

Manipulated variable Constant variable Response variable [3 marks] (c ) Define frictional force operationally. SULIT 55/2

10

SULIT

Nama: ___________________________ Tingkatan: ________________

55/2

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]

(f) Predict the weight used when the wooden tray is replaced by a piece of cloth. __________________________________________________________ SULIT 55/2

11

SULIT

Nama: ___________________________ Tingkatan: ________________

55/2 [1 mark]

(g) Give two reasons why we need to reduce frictional force. __________________________________________________ __________________________________________________ [2 marks]

END OF QUESTION PAPER

SULIT 55/2

12