Sains Ting 2 2008

NAME: ___________________________

CLASS: 2 ( A / B / C / D / E / F )

SMK TINGGI SARIKEI (YFB 6101) MIDTERM EXAMINATION 1st TERM 2008 SCIENCE FORM 2 Paper 2 1 hour 30 minutes

INSTRUCTIONS 1. 2. 3. 4.

This question paper consists of two sections. Answer all questions. Write your answers clearly in the space provided in the question paper. If you wish to change your answer, cross out the answer that you have done. Then write down the new answer. 5. This question paper must be handed at the end of examination.

THIS QUESTION PAPER CONSISTS OF 10 PAGES INCLUDING COVER Prepared by:

Section Section A

……………………………….. Anuar Bin Mat

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Checked by:

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……………………………… Guru Kanan Jab. Sains

5 6 Section B

Verified by:

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……………………………… Pengetua / Penolong Kanan 1

Total Mark

Mark

Section A (40 Marks) Answer all the questions in this section 1. Fill in the blanks with the words given below.

Muscles Interpreting

Receptors Stimuli

Electrical impulses Nerves

inform Controls

a) Sensory organs have special structures called _____________________________ which detect ________________________ from around us and ___________________________ the brain of any changes in our environment.

b) Nerve impulses are ______________________________ which are transmitted to the brain by our ______________________________.

c) The brain _________________________________ all parts of our body by receiving nerve impulses from the receptors, ____________________________ and then sending out nerves impulses to other parts of the body.

d) Effectors are _____________________________ or glands which respond to impulses from the brain. (8 Marks)

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2. Figure 1 shows the structure of the human eye. (a) Name the structures labelled P, Q, and R on the human eye in Figure 1 P - _______________________________________________________________ Q - ______________________________________________________________ R - _______________________________________________________________ (3 Marks) (b) (i) Using the letter B, label the blind spot on Figure 1. (ii) Why is it called the blind spot? __________________________________________________________________ (1 mark)

(c) Figure 2 shows a person`s eye whe viewed from the front. (i) Draw what happens to the pupil of his eye when he enter a dark room.

(1 mark)

(ii) Explain why. ________________________________________________________________________ ________________________________________________________________________ (1 mark)

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3. Figure 3 shows the cross section of human skin.

(a) Label the following structures in Figure 3.

(5 marks)

(b) Give two (2) reasons to explain the different sensitivity of skin on different parts of the body. (i) __________________________________________________________________ __________________________________________________________________

(ii) __________________________________________________________________ __________________________________________________________________ ( 2 marks)

4. Write true for a statement that is true and false for a statement that is false. (a) Sound is produced when an object vibrates

_______

(b) Sound travels faster through solids than gases

_______

(c) Sound cannot be reflected

_______

(d) Soft surfaces absorb sound well

_______

(e) If the ossicles fuse together, a person will become deaf

_______

(f) A hearing aid has an amplifier

_______

(g) We cannot hear sounds with frequencies lower than 20 Hz

_______

(h) Sound impulses reach the left ear and right ear at the same time

_______ (8 marks)

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5. Complete the table to correctly compare long-sightedness and short-sightedness. Long Sightedness

(a) Can see __________________ object

Short-sightedness

Can see _______________object clearly.

clearly

(b) Caused by an eyeball that is too ___________

(c) Light is focused _________________ the retina

(d) Corrected by wearing________________ lenses.

Caused by an eyeball that is too ________________

Light is focused _________________ the retina

Corrected by wearing________________ lenses. (8 marks)

6. Figure 4 shows a certain defect of vision.

(a) (i) Give two (2) reason for this defect __________________________________________________ __________________________________________________ (2 marks) (b) What kind of lense used to correct this defect? ________________________________________________

(1 mark) 4

Section B (20 Marks) Answer all the questions in this section. 7.

Figure 5 shows the physical processes involved in the change of state of matter. (a) Name the physical processes represented by P, R, S, T and U. (i) P : ________________________________________ (ii) R : ________________________________________ (iii) S : ________________________________________ (iv) T : ________________________________________ (v) U : ________________________________________

(5 marks)

(b) Name the two (2) physical processes represented by Q. _____________________________________________________________________ ____________________________________________________________ (2 marks)

(c) Name the three (3) proceses in Figure 5 that absorb heat. (i) ______________________________________ (ii) ______________________________________ (iii) ______________________________________

(3 marks)

(d) Name three (3) processes in Figure 5 that release heat. (i) ______________________________________ (ii) ______________________________________ (iii) ______________________________________

(3 marks)

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8.

Figure 6 shows an experiment on radiation of heat. (a) State the problem that is investigate in Figure 6. _____________________________________________________________ (1 mark)

(b) State the hypothesis of this experiment. _____________________________________________________________ (1 mark)

(c) States the variable of this experiment: (i) Fixed variable : _______________________________________________ (ii) Manipulated variable : __________________________________________ (iii) Responding variable : __________________________________________ (3 marks)

(d) The thermometer in which can has a lower reading at the end of the experiment? _________________________________________________________________(1 mark)

(e) What can you conclude from this experiment? _____________________________________________________________ (1 mark)

QUESTION PAPER END

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