Pmr Sci Bs Trial 15 2

7/28/2019 Pmr Sci Bs Trial 15 2

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Portal Pendidikan Utusan 2008 Hak Cipta TerpeliharaUtusan Melayu (M) Berhad, Kuala Lumpur

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KERTAS PERCUBAAN PMRPortal Pendidikan Utusan

SCIENCEPAPER 2 (SET 1)

Section A[40 marks]

Answerall questions.

The time suggested to complete this section is 60 minutes.

Diagram 1

1. (a) Label the apparatus given above correctly with the choice of answers

given in the box.

(3 marks)

(b) State the function of the apparatus given below.

Name Function

Crucible

Evaporating dish

Glass slide

(3 marks)

Crucible Evaporating dish Glass slide


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2. Diagram 2 shows the parts of the human digestive system.

Diagram 2

(a) Label parts P, Q and R using the following words in Table 1.

Small intestine Liver Stomach

Table 1

(3 marks)

(b) Draw a line to match each part with its function.

Part Function

P Produces bile for emulsifying fats

Q Absorbs digested food into the bloodstream

R Retain food and produces gastric juices

(3 marks)

(c) The following shows the pathway of food in the alimentary canal.

Complete the pathway by filling the boxes below.

(2 marks)


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3. Diagram 3 shows a human kidney

Diagram 3

(a) (i) Label two of the following structures in Diagram 3.

(2 marks)

(ii)State one function of P in Figure 3. (1 mark)

(b) State one of the difference between the blood in vessel X and in vessel Y.Vessel X Vessel Y

(1 mark)

(c) Name the excretion products that are excreted by the organs below.

Organ Excretion products

Skin

Lungs

( 2 marks)

Cortex Medulla Pelvis


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4. Diagram 4 shows the electrolysis of water.

Diagram 4

(a) On diagram 4, label electrodes X and Y using the following words.

Anode Cathode

(b) Name the gases collected in test-tube P and Q,

(i) Test-tube P :

(ii) Test-tube Q :

(2 marks)

(c) State one confirmatory test for the gases that you have named in (b).

Nos Gas in Confirmatory Test

i. Test-tube P

ii. Test-tube Q

(2 marks)

(d) What is the ratio of the volume of gas in test-tube P to the gas intest-tube Q?

.

(2 marks)

(e) Why is dilute sulphuric acid added to the distilled water ?

.

(1 mark)


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5. Diagram 5.1 shows the exchange of the gases between the blood capillary and

the cells in the human body.

Diagram 5.1

(a) Name gas R and S in Figure 5.1.

R :

S : (2 marks)

(b) Mark using an arrow to show the diffusion of foods in

Diagram 5.1.

(c) (i) Gas R is used during the chemical reaction in the cell. Name

the process involved.

(ii) Write the word equation for the process in (c) (i).

+ oxygen + + energy

(1 mark)

(d) Diagram 5.2 shows the blood vessels,

Diagram 5.2

State the difference between the blood in X and the blood inY.

X Y

(2 marks)


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6. Diagram 5 shows a flow chart of the main stages in a water treatment plant.

Diagram 6

(a) Name the processes labelled in Diagram 6 by using the words given in

the box below.

A :

B :

C : .

(3 marks)

(b) State the functions of the following substances during water treatment.

(i) Layers of sand and stones

(ii) Fluorine

(2 marks)

(c ) (i) Name one source of water pollution.

..

( 1 mark)

(ii) State two effects of water pollution on living things from thechemicals of agricultural activities.

( 2 marks)

Sedimentation Filtration Chlorination


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Section B

[20 marks]

The time suggested to complete this section is30 minutes.

7. Table 7.1 shows the density of five different substances.

Substances Density (g/cm3)

Cork 0.25

Lead 11.0

Sea water 1.02

Mercury 13.6

Glycerine 1.28

Distilled water 1.0

Table 7.1

(a) Based on the table 6.1, answer the following questions.

(i) Which substance will float on distilled water?

(ii) Name one substance that will sink in water...

(2 marks)

(b) What can you observe when distilled water and sea water are placed

together in a beaker?

(1 mark)

(c ) Diagram 7.2 shows the position of six substances, which are put in a

measuring cylinder. Label Diagram 7.2 with the substances given in

Table 7.1.

Diagram 7.2

(2 marks)


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( d) Explain why you can see only five layers in the measuring cylinder.

.

(1 mark)

(e) What is the conclusion of this activity?

..

(2 marks)

8. A student carried out an experiment to study the relationship between current

and resistance.

Diagram 8.1

The experiment was carried out following the procedures stated below.

Step 1 : Apparatus was assembled, as shown in the Diagram 8.1.

Step 2 : The reading of ammeter was recorded when the substances is 3 ohms

Step 3 : Step 2 was repeated by using resistance of 4 ohms, 5 ohms, 6 ohms

and 7 ohms.

(a) State the variables of this experiment.

Fixed variable

Responding variable

Manipulated variable

(3 marks)

(b) What is the inference of this experiment?

(1 mark)


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(c) Based on diagram 8.2, record the reading of the ammeter when the

resistance are 3 ohms, 4 ohms, 5 ohms, 6 ohms and 7 ohms in Table

8.3.

Diagram 8.2

Resistance / Ohm Current / Ampere

3

4

5

6

7

Table 8.3

( 2 marks)

(d) Based the Table 8.3, plot the graph to show the relationship between

resistance and current.

( 2 marks)


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(e) Based on the graph in ( d ), state the relationship between resistance

and current.

(1 mark)(f) Calculate the value of current if the resistance is 9 ohms.

..

(1 mark)

(g) (i) State the type of electrical wiring at home.

(1 mark)

(iii) Give the reason for your answer in (g) (i).

..

(1 mark)


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Answers

1. (a)

(b) i. Crucible to heat a substance strongly.

ii. Evaporating dish to evaporate a solution

iii. Glass slide to hold specimen under the microscope

2. P Liver

Q - Small intestine

R - Stomach

(b) P - Produces bile for emulsifying fats

Q - Absorbs digested food into the bloodstream

R - Retain food and produces gastric juices

(c) (i) stomach

(ii ) duodenum

(iii) small intestine

(iv) large intestine

3. (a) (i)

(ii) P - carries urine from the kidney to the urinary bladder

(b) Vessel X - carries oxygenated blood to the kidney

Vessel Y - carries deoxygenated blood away from the kidney.

(c) Skin - mineral salts and waterLungs - carbon dioxide and water

4. (a) X - anode

Y - cathode

(b) (i) oxygen

(ii) hydrogen

crucible Evaporating dish Glass slide


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(b) dissolved together

(c)

(d) Sea water and distilled water dissolved together to form one layer

because the density values are almost the same.

(e) The substances will not mix together and form different layers

depending on the density of specified subtances.

8. (a) Fixed variable voltage / number of cells

Responding variable current / reading of ammeter

Manipulated variable resistance / value of resistor

(b) the higher the value of resistor, the more current is used and the lower

the ammeter reading.

(c)

Resistance / Ohm Current / Ampere

3 1.0

4 0.75

5 0.6

6 0.5

7 0.4

(d)

(e) Inversely proportional, the more the resistance, the less the current

flows

(f) 0.2 amp

(g) parallel circuit

(h) When one of the resistors / electrical appliances does not function, it

won't affect the others.

Pmr Sci Bs Trial 15 2

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