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SECTION A

[20 marks]

Instruction : Circlethecorrect answers.

1. Which is the best definition of science?A. Treatment of illnessB. Discovery of new thingsC. Knowledge about the environmentD. Exploration of outer space

2. Arrange the following steps in a scientific investigation in the correct sequence.Pcarry out an experiment

Qcollect and interpret data

Ridentify the problem

Sform a conclusion

Tform a hypothesis

A. T, R, P, Q, SB. R, T, P, Q, SC. P, S, R, T, QD. S, R, T, Q, P

3. Why is scientific investigation important?

A. It allows scientists to use their skillsB. It encourage scientists to form hypothesisC. It increases our knowledge of the environmentD. It follows a scientific method

4. An experiment is carried out to investigate whether the time of swing of a pendulum isaffected by the weight of the bob. Which of the following variables are correct?

I. Constant variable : length of the pendulumII. Manipulated variable : weight of the bob

III. Responding variable : time of one complete swing of the pendulumA. I and II onlyB. I and III onlyC. II and III onlyD. I, II, and III

5. Ah Huat wishes to investigate how temperature affects the rate of dissolving sugar in

water. Which of the following factors will be manipulated?

A. The temperature of the water usedB. The volume of water usedC. The mass of sugar usedD. The size of sugar particles used

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6. Among the following processes, which is not used in the scientific method?A. Arranging in sequenceB. Forming inferencesC. Changing the data obtainedD.

Comparing and contrasting

7. A scientist must be able to

I. Observe accuratelyII. Plan and carry out scientific investigation

III. Draw conclusion rationallyA. I and II onlyB. I and III onlyC. II and III onlyD. I, II, and III

8.Which of the following is not a desirable attitude of a scientist who is carrying outscientific investigation?

A. Thinking critically and rationallyB. Foreseeing problems and difficultiesC. Carrying out an experiment without a definite aimD. Forming conclusion by analyzing the data obtained

9. Which of the following is not a desirable attitude of a scientist?

A. Eager to learnB. Anxious to save moneyC. Able to analyze dataD. Systematic in investigation

10. Which of the following is least required of a scientist?A. Ability to observe detailsB. Ability to organize an investigationC. Ability to work with other researchers in the teamD. Ability to predict correctly the result of an investigation

11. Which of the following is not part of the nervous coordination system?A. EyesB. BrainC. Spinal cordD. Backbone

12. Nervous coordination in the body enables the body to carry out the following.

I. Receiving and responding to stimuliII. Detecting changes in the environment

III. Performing activities such as riding a bicycle

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A. I and II onlyB. I and III onlyC. II and III onlyD. I, II and III

13. The figure below represents a neurone.

Name the parts labeled X and Y

X Y

A Axon Myelin sheath

B Dendron Dendrite

C Myelin sheath AxonD Dendrite Dendron

14. The peripheral nervous system consists ofI. The somatic nervous system

II. The autonomic nervous systemIII. The central nervous system

A. I and II onlyB. I and III onlyC. II and III onlyD. I, II and III

15. Which statement is not true about synapse?A. Space between the ends of two neuronesB. Initiates impulses to be sent to the brainC. Ensures impulses travels in one directionD. Present between a sensory neurone and a relay neurone

16. The figure below shows the human brain

Identify the parts labeled P and Q

P Q

A Cerebrum Cerebellum

B Cerebellum Medulla Oblongata

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17. The figure below shows a section through the brain.

Which part is wrongly matched with its function?

A. P : controls voluntary actionsB. Q : controls body coordinationC. R : controls reflex actionsD.

S : controls involuntary actions

18. The figure shows an endocrine gland.

If this gland does not produce enough hormones, the person is most likely to suffer

from

A. HypertensionB. Hepatitis BC. Diabetes mellitusD. Heart disease

19. Which drug below is wrongly classified?A. BarbituratedepressantB. HeroinstimulantC. Morphinepain killerD. Lysergic acid diethylamidemood changer

20. The effects of excess alcohol on the body include the following except..

A. Loss of body coordinationB. Impaired judgementC. Fast reaction to a crisisD. Hardening of the liver

C Medulla Oblongata Cortex

D Cortex Cerebrum

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SECTION B

[15 marks]

Answerallquestions

1. The flow chart shows steps involved in a scientific investigation. Complete the table

below with the correct answers. [5marks]

2.

Identifying the problem Making a hypothesis

Interpreting data

Reporting

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Figure 1 above shows the main endocrine glands in the body of a man.

a) List down six main endocrine glands in the human body. [3marks]i) ..

ii)..

iii).

iv).

v) ..

vi)..

b) Using the help of the diagramName the glands labelled Q and R on the diagram. [2marks]

i)..

ii).

3. Figure 2 shows the structure of the spinal cord.

a) Name the parts labelled I, II, [2marks]I.

II.

b) State the function of each of the labelled parts. [2marks]I

..

II

c) What is reflex arc. [1marks]

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

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SECTION C

[10marks]

Answerallquestions

1. a) What is hypothesis? [1marks]

b) State the differences between a manipulated variable and a responding

variable. [4marks]

2. a) Name the two system which control the coordination of the body. [1marks]

b) State 4 differences between these two methods of action. [4marks]

.END OF QUESTION PAPER.