microsoft word - march test f2 science 2009 final _2

8/14/2019 Microsoft Word - March Test F2 Science 2009 Final _2

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SEKOLAH MENENGAH KEBANGSAAN SEKSYEN 18 SHAH ALAM

UJIAN BULANAN 1 (MAC 2009)SCIENCE (TINGKATAN 2)

1 JAM

Nama :................................................ Tingkatan 2......................

Instructions:Answerall questions in the spaces provided.

1. Fill in the blanks with the words given in the box below.cochlea smaller nerve impulses brain

taste buds receptor sensitivity pupil

a) Different parts of the skin have different levels of ___________________.b) The number of ___________________ in an area affects skin sensitivity.c) _____________________ on our tongue detect taste.d) The _______________ converts the sound vibrations to __________________.e) The intensity of light influences the size of the _________________________.f) The image of an object formed on the retina is real, inverted and ____________________ than the

actual object

(7marks)

2. Match the parts of the ear with its functions.

(8marks)

Part Function

Auditory nerve Amplifies vibrationsOval window Receives sound wavesCochlea Controls balance of the bodyEar pinna Changes vibrations to impulsesOssicles Sends sound to the eardrumAuditory canal Send impulses to the brainSemicircular canal Vibrates when sound is receivedEardrum Allows sound to enter the inner ear


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3. Tick () the correct statements and cross (x) the incorrect ones.

a) The convex lens is used to correct short-sightedness.

b) When the eyeball is longer, a person is most likely to be diagnosed with long-sightedness.

c) Astigmatism causes blurred vision at all distances.

d) In long-sightedness the image of the object falls behind the retina.e) Contact lenses and excimer laser surgery are current technological methods used to correct

vision defects.

(5marks)

4. The following shows three situations.J Watching television

K Playing with a cat

L Eating ice cream

a) (i) Name all the sensory organs used in situation J_____________________________________________________________________

(3marks)

(ii) Give all the stimuli detected by the sensory organs stated in 1(a)(i)

_____________________________________________________________________

(3marks)

b) The following shows the pathway from stimulus to response involved in situation K. IdentifyXand Y.Touch (stimulus)

X

Nerve

Brain

Nerve

Y

Movement of hand (response)

X : ___________________________________________________________________________

Y : ___________________________________________________________________________

(2marks)


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c) (i) Situation L requires the use of two senses. One of the senses is the sense of taste. Name the othersense.

_________________________________________________________________________________

(1marks)

(ii) What is the effect on the taste of the ice-cream if a person in situation L suffers from a cold? Give

your reasons.

_________________________________________________________________________________

_________________________________________________________________________________

(2marks)

5. Figure 1 shows the cross-section of the human eye.

Figure 1

(a)On the figure above, label organs P, Q,R and S using the following terms.

(4marks)

(b) Tallows the light ray to enter the eye. Label Tin the figure. (1mark)(c) Based on structures Q andR, complete the table below.

(2marks)

Structure Function of structure

Q

R

Cornea Vitreous humour Iris Retina Lens

Q:

P: R:

S:


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(d) Complete the flow chart below to show the path of light rays entering the eye.

Cornea

(4marks)

(e) Draw the formation of image in the eye of a long-sighted person in the figure below.

(3marks)

Disediakan oleh, Disemak oleh, Disahkan oleh,

______________ _______________ _______________

Cik Siti Shaharzad Wahab Pn. Goh Poh Ai Pn Rosnah Ab RahmanGuru m/p Sains Guru BI GKMP Sains & Matematik

Disemak oleh,

_______________

Pn. Marziana Mohd Zaki

Ketua Panitia Sains

Retina

microsoft word - march test f2 science 2009 final _2

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