SEKOLAH MENENGAH KEBANGSAAN MUNSHI ABDULLAHSCHOOL HOLIDAY HOMEWORK SCIENCE 2013 FORM 3

NAME: ……………………………………………………………………………….

FORM: ………………………………………………………………………………..

STRUCTURED QUESTIONSECTION AInstruction: Answer all questions

1. Diagram 1 shows part of the human respiratory system.

(a) Label P, Q and R on Diagram 1 with the following words.

Lung Diaphragm Trachea

[3 marks]

(b) The sequence shows the flow of inhaled air in the respiratory system.

Trachea Z bronchiole alveolus

Label Z on Diagram 1.[1 mark]

(c) The movement of S causes the thoracic cavity to expand during inhalation. How does S move during inhalation?

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

1

S

P: …………………………….

Q: …………………………….

R: …………………………….

Diagram 1

S

2. Diagram 2 shows an activity to show the effect of cigarette smoke on the lungs.

(a)What are the changes to the following at the end of the activity?

(i) The temperature: …………………………………………………………………………………………………………….

(ii) The white cotton wool: …………………………………………………………………………………………………….

(ii) The hydrogen carbonate indicator: ………………………………………………………………………………….[3 marks]

(b) State one inference based on the observation in (a)(iii).

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

(a) Name one harmful substance found in cigarette smoke.

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

(d) Suggest one good habit that can help to improve the quality of air around us.

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

2

Diagram 2

3. Diagram 3 illustrates the circulation of blood in the human body.

(a) Label the following on Diagram 3.

Aorta Right ventricle Pulmonary artery

[3 marks]

(b) Mark using arrow to show the flow of oxygenated blood in the circulatory system.[1 mark]

(c) The systemic circulation is the circulation of blood from the heart to the body cells and back to the heart again. Label the systemic circulation on Diagram 4.

[1 mark]

(d) State one difference between blood vessel P and blood vessel Q.

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

4. Diagram 4 shows the human excretory system.

3

P: ……………………….

Q: ……………………….

R: ………………………..

Diagram 4

Diagram 3

P Q

Lungs

Body

(a) On Diagram 4, label P, Q and R with the following words.

Lung Skin Kidney

[3 marks]

(b) Draw lines to show the correct match between the excretory organs and their excretory products. The answers can be used more than once.

Draw the lines as shown below.

Excretory organ Excretory products

[2 marks]

SECTION BInstruction: Answer all questions

5. (a) A pupil observed that the condition of a plant is different in the morning compared to the afternoon.

4

P

Q

RUrea, water, mineral salts and carbon dioxide

Urea and water

Carbon dioxide and water

Urea, water and mineral salts

12

6

39

12

457

8

1011

12

6

39

12

457

8

1011

Morning Afternoon

Diagram 5.1

(i) Based on the observations in Diagram 5.1, state the difference in the condition of the plant.

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

(ii)What inference can be made based on Diagram 5.1.?

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

(iii) State your hypothesis based on your observations in Diagram 5.1.

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

(b) The pupil then carries out an experiment to investigate the situation in Diagram 5.1. Diagram 5.2 shows the arrangement of apparatus for the experiment.

The pupil takes the following steps:

S 1 Two similar green plants X and Y are set up as shown in Diagram 5.2.S 2 Initial mass of X and Y are taken.S 3 Plant X is left at room temperature that is 30 oC S 4 Plant Y is put under a heat source that is 40 oCS 5 The final mass of X and Y are taken after 2 hours.S 6 The results are tabulated in table 5.3

Results:Plants Initial mass Final mass

X 280.60 g 280.00 gY 280.60 g 278.80 g

Table 5.3

5

Electronic balance

Water

Layer of oil

Cotton wool

Thermometer

30 oC

Electronic balance

Water

Layer of oil

Cotton wool

Thermometer

40 oCHeat source

Diagram 5.2

Plant X Plant Y

(i) Using the formula,

calculate the rate of transpiration for plant X and Y and complete Table 5.4.

Plant Rate of transpiration (g/hour)P

Q

Table 5.4[2 marks]

(ii) Using Table 5.4, draw a bar chart to show the rate of transpiration in plant P and plant Q.

[2 marks]

(iii) Based on the bar chart in (b)(ii), what can be said about the rate of transpiration in the plants? ……………………………………………………………………………………………………………………………………………….

[1 mark]

6

Rate of transpiration = Mass lost (g) Time (hour)

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

Rate

of t

rans

pira

tion

(g/h

our)

Plant

State the variables involved in this experiment.

Manipulated variable

Responding variable

Constant variable

[3 marks]

(c) Based on the experiment, state the relationship between temperature and the rate of transpiration.

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

END OF QUESTIONS PAPER

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