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Section A

[40 marks]

Answerall questions

1. Diagram 1 shows particles in three substances W, X and Y.

W : . X : ... Y : .

Diagram 1

(a) Label W, X and Y in Diagram 1 with the following words:

[3 marks](b) Name one substance that has the same type of particle as in W.

..[1 mark]

(c) Draw lines to match metal with its properties.

[2 marks]

Mixture Compound Element

Metal

Properties

Good conductor of heat

Brittle

Dull surface

Malleable

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2. Diagram 2.1 shows the vertical section of the eye.

Diagram 2.1

(a) Label the parts of the eye U and V with words from the box below in Diagram 2.1

[2 marks](b) State the function of the part label S.

[1 mark]

Diagram 2.2

(c) Diagram 2.2. shows a model representing a type of vision defect.

(i) State the type of vision defect represented.

[1 mark]

(ii) State one reason for the vision defect in (c) (i).

[1 mark]

Pupil Cornea Retina Optical nerve

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(iii) Two types of lenses are shown in Diagram 3.3 below..

X Y

Diagram 2.3

Which type of lens, X or Y, can be used to correct the vision defect in (c)(i)?

.

[1 mark]

3. Diagram 3 shows the different parts of a flower.

Diagram 3

(a) On Diagram3, label the structures X and Y which are:

X the structure that produces the pollen grains

Y the place where fertilisation occurs

[2 marks]

(b) Based on Diagram 3, what do you think is the agent of pollination for the flowershown? Give one reason to support your answer.

Pollinating agent :

Reason : ..

[2 marks]

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(c) State the characteristic you would expect the pollen grains of this flower tohave.

[1 mark]

(d) Give one advantage of cross pollination in agriculture.

[1 mark]

4.

Diagram 4

(a) Diagram 4 shows the growth curves of boys and girls based on bodyweight.

(i) Which curves M or N is the growth curve for boys?

M

N

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..

(ii) State one reason for your answer.

.

.

[2 marks]

(b) Based on Diagram 4, at what age do

(i) both boys and girls grow most rapidly?

...

(ii) boys reach puberty?

.

[2 marks]

(c) What happens to the rate of growth when the boys and girls reach

(i) adulthood?

...

(ii) old age?

..

[2 marks]

5.

Diagram 5.1

Diagram 5.1 shows a part of the female reproductive system and some process thatoccur in the system.

(a) What are the processes P,and R that occur in the female reproductive system?

Process P : ........................................................................................................

Process R : ..

Process Q

Process P

Process R

Uterus

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[2 marks]

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(b) Describe what happens during Process Q.

....

[1 mark]

Diagram 5.2 shows the development of a foetus inside the uterus.

Diagram 5.2

(c) (i) Name structure X and Y.

X : .. Y : ..

[2 marks]

(ii) Describe how structures X and Y work together to support the

development of the foetus...

..

..

..

[2 marks]

(d) What is the function of fluid labelled Z?

...

[1 mark]

Foetus

Fluid Z

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6.

Diagram 6.1

Diagram 6.1 shows a paper cutter.

(a) On diagram 6.1, label the positions of the fulcrum, load and effort.

[2 marks]

(b) (i) Based on diagram 6.1, state the class of lever to which the papercutter belong.

...........................................................................................................

(ii) Give one reason for your answer.

[2 marks]

Diagram 6.2

(c) Based on Diagram 6.2, choose one tool with the same class of lever as the

[1 mark]

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(d) Diagram 6.3 shows a lever that is in equilibrium.

Load Force W25 cm 50 cm

60 NFulcrum

Diagram 6.3

(i) Calculate the force W needed to balance the metre ruler using thefollowing formula:

X = X

[2 marks]

(ii) What must you do to keep the metre rule in balance if the load is shiftedfurther away from the fulcrum?

..

[1 mark]

LoadDistance of loadfrom the fulcrum Force

Distance of forcefrom the fulcrum

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Section B

[20 marks]

Answerall questions

7. Diagram 7.1 shows four situations of heat transfer P, Q, R and S.

P Q

R S

(a) Based on your observations, state one characteristic of each situation ofheat transfer P, Q, R and S.

Heat transfer Characteristic

P

Q

R

S

[4 marks](b) Classify the situations of heat transfer into two groups based on their common

characteristics

P, Q, R, S

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[4 marks]

(c) Diagram 7.2 shows a method of heat transfer used in air ventilation of a building.

Diagram 7.2

Commoncharacteristics

Letters of heattransfer

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Based on Diagram 7.2.

(i) State one inference about the heat transfer.

.............

..

[1mark]

(ii) Predict what will happen to the temperature of the house if the hole for theair is closed.

[1 mark]

8. (a) The diagram 8.1 below shows some wet clothes hung on a line under differentconditions.

Condition A Condition B

Diagram 8.1

(i) Based on your observations in Diagram 8.1, state the difference in thetime taken for the clothes to dry in Condition A and Condition B.

[1 mark]

(ii) What inference can be made based on Condition A and Condition B in thediagram above.

[1mark]

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(iii) State one hypothesis based on your observations in the diagram above

[1 mark]

(b)