science form-2.k1

7/31/2019 science FORM-2.K1

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SAINS TERAS NAMA : ____________________________

Kertas 1 TINGKATAN : ______________________

PEPERIKSAAN PERTENGAHAN TAHUN 2006

TINGKATAN DUA

________________________________________________________________________

SAINS TERAS

KERTAS 1

Masa : Satu Jam

________________________________________________________________________

JANGAN BUKA BUKU SOALAN SEHINGGA DIBERITAHU.

1. Kertas soalan ini mengandungi 40 soalan. Jawab semua soalan.

2. Jawab dengan menghitamkan ruangan pada kertas jawapan.

3. Bagi setiap soalan hitamkan satu ruangan sahaja.

4. Jika kamu hendak menukarkan jawapan, padamkan tanda yang telah dibuat.Kemudian hitamkan jawapan baru.

________________________________________________________________________


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Soalan ini mengandungi 10 halaman bercetak.

1. How does science help us?I. It helps us to learn about natural phenomena

II. It helps us to solve most of our problems

III. It helps to prevent future volcanic eruptions

I and II only

I and III onlyII and III only

I, II, and III

2. What does an ecologist study?A. The factors affecting the rate at which a plant carries out photosynthesis

B. The relation of plant, animals and humans to each other and to their

environment.

C. The functions of water in plant processes.D. The composition of the earth and water

3. Which of the following is a contribution of science in the field of medicine?

A. Building more hospitals

B. Immunising babies and children against diseasesC. Treating sick people at home

D. Operating more ambulance services

4. Which of the following activities should not be done in the science laboratory?A. Pour excess chemicals back into the reagent bottles.

B. Do not waste chemicals

C. Switch off the gas tap as soon as heating is over.D. Use a burette to measure the volume of liquids accurately.

5. In what ways are a crucible and a test tube similar?I. Both can be used to measure the volume of liquids.

I. Both can be used to contain chemicals.

I. Both can be used to heat chemicals

I and II only

I and III only

II and III onlyI, II, and III

6. Robert Hooke was the first person to observe cells under a microscope. What werethe cells he observed?

A. Cheek cells

B. Cork cells

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C. Nail cells

D. Root cells

7. A slide of potato cells is made. How can the cells be seen more clearly?

A. Stain the specimen.

B. Heat the specimen.C. Wet the specimen.

D. Do not use cover slip.

8. The cover slip must be lowered slowly onto the specimen. What is the reason for this?

A. To avoid damaging the specimen.

B. To avoid water spilling onto the microscope.

C. To avoid trapping air bubbles.D. To help observe the specimen clearly.

9. What is the structure labeled JA. Cytoplasm

B. NucleusC. Cell membrane

D. Cell wall

10. Which of the following structures contains genetic information?

A. Cell wall

B. NucleusC. Vacuole

D. Cytoplasm

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11. Based on the figure above, what senses are most probably represented by X and Y?

A.

B.

C.

D.

12. The central nervous system is made up of

A. Nerves and brain.

B. Blood vessels and nervesC. Spinal cord and brain.

D. Spinal cord and nerves.

13. The figure above shows some receptors in the human skin. Which part P, Q, R, or S is

most sensitive to cold?

A. P

B. QC. RD. S

14. Which of the following statements describes the skin incorrectly?

A. The skin produces vitamin A when exposed to the morning sunlight.

B. The skin is made up two important layers.

X Y

Smell Touch

Sight Taste

Hearing Taste

Sight Smell

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C. The human skin has five types of receptors.

D. The epidermis layer is made up of dead cells.

15. The degree of sensitivity of the skin to stimuli is affected by..

A. The thickness of the dermis layer.

B. The number of receptors present.C. The roughness of the skin.

D. The size of receptors presesnt.

16. Which of the following statements regarding the sense of smell are correct?

I. The smell receptors are situated at the bottom part of the nasal cavity.

II. Inhaled chemicals dissolve in the mucus to stimulate the smell receptors.

III. The receptors are covered with mucus.

I and II only

I and III only


17. Figure above shows a human tongue. Based on the figure, which of the following parts

are most sensitive to lemon juice and sugar-free coffee respectively?

A.

B.

C.D.

Lemon juice Sugar-free

coffee

Q P

S R

Q RS P

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18.

Based on the information given above, G is most probably .

A. The blind spot.

B. The yellow spot.C. The iris.

D. The pupil.

19. The statements below refer to the characteristics of structure P.

Functions to magnify vibrations

Transfers vibrations from eardrum to the oval window

Consists of three small bones

Based on the given information, which of the following is not a part of P?A. Anvil

B. Stirrup

C. Hammer D. Tibia

20.

Based on the information given above, what is D?

E. Semicircular canals

F. Eustachian tubeG. Cochlea

H. Ossicles

21. The information below describes the characteristics of a certain part of human eye.

Strong, fibrous, opaque and tough

Outer most layer of the eye

The function of this particular part is to.

A. Focus the image onto the retina.

B. Detect the image and changes it to nerve impulses.

C. Protect the eyeball.D. Transmit impulses from the retina to the brain to interpreted.

G

Also known as the fovea

A point which lies on the retina, directlyopposite the pupil.

D

Spiral-shaped tube that is filled with fluid.

Converts sound vibrations to nerve

impulses

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22. Which of the following is not a characteristic of the image that is reflected in a plane

mirror?

A. InvertedB. Same size as the object

C. Laterally inverted

D. Virtual

23. Which part of the following is not a part of a hearing aid?

A. Amplifier

B. Earphone

C. LoudspeakerD. Microphone

24. A doctor usually uses a . to listen to the heartbeat of a patient.

A. Hearing aid

B. EarphonesC. Amplifier

D. Stethoscope

25. Thigmotropism is defined as.

A. The response of a part of a plant to touch, light and heat.

B. The response of a part of plant to a localized.C. The response of a part of a plant to light.

D. The response of a part of a plant to gravitational force.

26. Which parts of a plant show positive phototropism?

I. Leaves

II. StemIII. Roots

I and II only


I, II, and III

27. Which of the following is correct regarding proteins?

A. Proteins are made up of carbon oxygen and nitrogen.B. The basic unit of a protein is glucose.

C. Proteins are important for the new tissues in our body.

D. We need proteins to maintain body temperature.

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28. Which of the following is a source of carbohydrates?

A. BananaB. Carrot

C. Bread

D. Meat

29. Which of the following diseases is caused by lack of vitamin B?

A. Osteomalacia

B. Cretinism

C. Fatigue

D. Dermatitis

30. Energy in food is measured in.

A. WattsB. Newtons

C. JoulesD. Degree Celsius

31. Uncle Lim is suffering from heart disease. What should he do to improve his health?

A. Take less vitamins

B. Take less fats and eggs

C. Take less sugarD. Take more sodium

32. Which of the following statements is correct?

A. Calcium and phosphorus help to form strong bones and teeth.

B. Lack of vitamins B can cause beriberi and xerophtalmia.C. A shortage of fibre will cause fatigue.

D. Iodine is taken to prevent anaemia

33. An unbalanced diet can cause health problems such as

I. Obesity.

II. Goiter.III. Anorexia.

I and II onlyI and III only

II and III only

I, II, and III

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34. Which of the following are parts of the alimentary canal?

I. Large intestine

II. OesophagusIII. Heart


II and III only

I, II, and III

35. Which of the following statements are true?

I. Bile is an acidic juice produced by the stomach.II. Digestion begins in the mouth.

III. Peristalsis pushes food down the oesophagus to stomach.



36. Which of the following are correct?

I. Fats and Vitamin A, B, C and D can be absorbed into the lacteal.

II. Starch particles are bigger than glucose particles.

III. The villi increase the small intestine to facilitate absorption.

I and II only


I, II, and III

37. Which of the following food items should you take to prevent pellagra?

I. Milk

II. Yeast extractIII. grains

I only

I and II only


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38.

Helps small plants to get support from big plants.

Helps small plants to get sunlight.

A. Nastic movement.

B. Thigmotropism.

C. Phototropism.D. Hydrotropism.

39. Which of the following statements are correct?

I. Our sensory organs help us detect changes that happen in the environment around us

II. Stimuli are defined as the changes that take place in the environment.

III. A response is explained as the way we react to a stimulus.

I and II only


I, II, and III

40.

Stimulus Sensory organs Nerves X Nerves

Response

Based on the pathway above, what is the function of X?

A. Transports oxygen from the lungs to all parts of the body.

B. Processes and stores information.C. Removes toxic substances from the body.

D. Sends impulses from one part of the body to another.

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Skema Jawapan Sains Tingkatan Dua

Pertengahan Tahun

1. A

2. B3. B

4. A

5. C

6. B7. A

8. C

9. D

10. B11. D

12. C13. B

14. A

15. B16. C

17. A

18. B

19. D20. C

21. C

22. A

23. C24. D

25. B

26. A

27. C28. C

29. D

30. C

31. A32. C

33. D34. C

35. B

36. C37. D

38. B

39. D

40. B

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