Midterm Sains Ting 2 2013

8/10/2019 Midterm Sains Ting 2 2013

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Name : ... Form : ..

SEKOLAH MENENGAH KEBANGSAAN CONVENT SENTULJALAN SENTUL, 51000 KUALA LUMPUR

MID-YEAR EXAMINATION2013

SCIENCE

FORM 2

TIME : 2 HOURS

YOU MAY OPEN THE PAGES WHEN INSTRUCTED

1. Read the questions carefully.2. There are 30 objective questions and 6 structure questions.3. Answer all the questions in Section A.4. Answer 5 questions from Section B.

5. You are allowed to use a scientific calculator.

This paper consists of 13 printed papers.

SOALAN MARKA

Section A

1

2

3

4

5

6

Disediakan Oleh:

(AZMIZI BIN ABDULLAH)Guru Sains Tingkatan 2

Semakan 1:

(FITRI YANTI BT ABD. JALIL)Ketua Panitia Sains

Semakan 2:

(KAMALIAH BT SAAD)Guru Kanan Sains

Semakan 3:

(HAMIDAH BT MOHAMED)PK Petang

Semakan 4:

(TAN TEE HWA)Pengetua


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Section A (Answer all the questions in this section)

1. Diagram 1 shows cross-section of a human ear.

Diagram 1Which of the following shows the correct sequence of the pathway of sound wave into the ear?A T P S R C P Q S RB T S Q R D T S Q R

2. A student with normal vision wears the spectacles of his friend with long-sight. His vision

becomes blurred. Which of the following shows the correct position of image in his eyes?

3. Table 1 shows the end products of digestion in the small intestine.

Organ Class of Food End Product of Digestion

Small intestine

Carbohydrates J

Proteins K

Fats L

Table 1Which of the following represents J, K and L?

J K LA Amino acids Fatty Acids and Glycerol Glucose

B Fatty Acids and Glycerol Amino acids Glucose

C Fatty Acids and Glycerol Glucose Amino acids

D Glucose Amino acids Fatty Acids and Glycerol

R

QP

ST

A

B

C

D


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4. Which of the following classification of animals is correct? Animals Class

A Duck Reptile

B Snake Amphibian

C Whale MammalD Crocodile Fish

5. Diagram 5 shows the components in an ecosystem.

Diagram 5Which of the following represents P, Q, R and S?A Non-living things Living things Soil C Living things Non-living things SoilB Living things Non-living things Plants D Non-living things Living things Plants

6. Diagram 6 shows a food web.

Diagram 6Which of the following pair of organisms are competitors for the same type of food?A U and R C T and R

B U and S D Q and R7. Which of the following shows the reflection of light?

Ecosystem

P Q

AirDecomposer Animal R S Water Light

D

CA

B


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8. Diagram 8 shows the limitation of sight.

Diagram 8This limitation of sight is calledA blind spot C stereoscopic visionB optical illusion D monocular vision

9. Diagram 9 shows a type of response in plant.

Diagram 9The type of tropism shown by the plant isA Phototropism C ThigmotropismB Hydrotropism D Nastic movement

10. The information shows a menu in Restaurant X.

This menu is not a balanced diet because it lacks inA Iron C Vitamin CB Protein D Carbohydrates

11. Where does the reabsorption of water take place when food passes through the alimentarycanal? A Mouth C Small intestineB Stomach D Large intestine

12. The information shows a list of animals which have common characteristics. What are the common characteristics?

A Lays eggs C Have backbonesB Cold-blooded D External fertilisation

A cup of coffee with sugar

Two slices of bread

Butter

Two half boiled eggs

Snake Bird Whale


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13. Diagram 13 shows an interaction between two organisms.

Diagram 13Which of the following interaction is similar to the diagram?A Algae and fungi C Parasites in human intestines

B Remora fish and sharks D Bacteria in termite intestines14. Diagram 14 shows a pyramid of numbers.

A

B

C

D

Diagram 14Which of A, B, C and D represents secondary consumers?

11. Which part of the plant shows positive hydrotropism?A Root C Stem B Leaf D Shoot

15. Diagram 15 shows a ray of light travelling from medium P to medium Q.

Diagram 15Which of the following could be medium P and Q?

Medium P Medium QA Air GlassB Air Water C Water Glass D Glass Water

Medium Q

Medium P


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20. Diagram 20 shows a child who is suffering from a disease.

Diagram 20Which of the following causes the disease?A Deficiency of protein C Deficiency of calcium mineralB Excessive intake of fats D Excessive intake of carbohydrates

21. Which of the following groups of living organisms can be found in the same habitat?A Fish, bird, orchid C Cactus, chicken, crocodileB Lion, monkey, snake D Fern, grass, seaweed

22. Diagram 22 shows relationship among species, population and community in a habitat.

Diagram 22What do X, Y and Z represent?

X Y ZA Plants Animals AirB Minerals Plants Animals

C Water Air AnimalsD Plants Temperature Animals

23. Which of the following best describes the importance of a balanced ecosystem?A It provides fresh air.B It balances the world climate.C It recycles gases and minerals.D It ensures that all living organisms can live together.

24. Diagram 24 shows the habitat occupied by four types of organisms, P, Q, R and S.

Diagram 10Which of the following organisms is a tertiary consumer?A P C RB Q D S

Ecosystem

Living Components Non-Living Component

X Y ZSoil


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25. After cutting down trees in the jungle for timber, the forests are replanted with young trees.This is the process of A education C conservationB preservation D pollution control

26. A person having a bad cold cannot identify identity of food he is eating becauseI. his nose contains a lot of mucus

II. his taste buds do not functionIII. both the senses of smell and taste are required to do this

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

27. Which of the following statements are true ?I. Insects are invertebrates

II. Not all invertebrates are insectsIII. Spiders are not insects


28. Dicotyledonous plants haveI. tap root

II. leaves with net-work veinsIII. floral parts in multiples of three

A I and II onlyB I and III onlyC II and III only

D I, II and III

29. Photosynthesis is important in maintaining the balance in nature because it is the onlyprocess which

I. absorbs carbon dioxide from the airII. stores food for the animals

III. changes light the energy into chemical energyA I and II onlyB I and III onlyC II and III onlyD I, II and III

30. Among the steps that we can take to conserve living organisms areI. practising reforestation

II. establishing national parksIII. establishing centres to reproduce endangered species



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Section B (Answer five questions from this section)

1. Diagram 1 shows a set up of apparatus to study the need for a medium for sound to travel.

Diagram 1

When the electric bell is switched on, a ringing sound can be heard. When the vacuum pump isswitched on, the ringing sound becomes fainter until finally it cannot be heard anymore.

a) State the energy changes that occur in this experiment.

[2 marks]

b) What happen to the ringing sound when all the air has been sucked out of the bell jar?

[1 mark]

c) What inference can you make based on the observation in (b)?

[1 mark]

d) How do we know that the electric bell is still functioning?

[1 mark]

e) Give one method use by astronauts to communicate on the moon.

[1 mark]


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2. Diagram 2 shows a pyramid of numbers

Diagram 2

(a) Based on Diagram 2 name the(i) producers : .

(ii) primary consumers: [ 2 marks ]

(b) State the food chain based on Diagram 2

[1 mark]

(c) Draw an arrow in the provided box of Diagram 2 to show energy flow. [1 mark ]

(d) If the population of frog decreases, what will happen to the population of

(i) grass :

(ii) snake : [2 marks]


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3. Figure 3 shows four animals, L, M, N and O.

(a) Classify L, M, N and O into vertebrates and invertebrates.

[2 marks]

(b) Give one special characteristic each for L and O.

L:

O: ........................................................... [2 marks]

(c) Which of the animals is a mammal?

. [1 mark]

(d) Give another example of mammal.

.. [1 mark]

4. (a) What is mean by commensalism?

[1 mark]

(b) Give one example of commensalism.

[1 mark]

(c) Name the commensal and the host.

Commensal: The host: [2 marks]

(d) Which of the two animals benefits from the interaction?

.. [1 mark]

Vertebrates Invertebrates


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5. (a) What are the importance of proteins and carbohydrates to our body?

Carbohydrates:

Proteins: [2 marks]

(b) A cereal supplies 1200 kJ of energy per 100gi. What does kJ stand for?

.. [1 mark]ii. What does the statement actually mean?

.. [1 mark]

(c) i. Name one food that supplies dietary fibre

. [1 mark]ii. How does fibre help our body?

.. [1 mark]

6. (a) Diagram 6.1 shows the apparatus set-up to study the absorption of digested food in twoboiling tubes, L and M.

Diagram 6.1

(i) Write the organ in the human digestive system that is represented by the Visking tube.

.............................................................................................................. [1 mark]

(ii) State one step to increase the efficiency of absorption of digested food in Diagram 5.1.

.............................................................................................................. [1 mark](iii) Compare the absorption of food in boiling tube L and boiling tube M.

............................................................................................................... [1 mark]


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(b) Diagram 6.2 shows the apparatus set-up to study the action of saliva on starch solution.

Diagram 6.2 After 30 minutes, the mixture in the test tube is tested with Iodine solution and Benedictssolution. The result of the experiment is shown in Table 6.

Test Tube Iodine Test Benedicts Test R The brown colour of iodine

remain the same

A brick-red precipitate is

formed

S A blue-black is formed The blue colour of Benedicts

solution remain the same

Table 6Based on the results shown in Table 6, state why there is glucose in test tube R after 30minutes.

......................................................................................................................... [1 mark]

(c) Diagram 6.3 shows a structure found in the small intestine.

Diagram 6.3(i) Name the structure shown in Diagram 6.3.

........................................................................................................................ [1 mark](ii) State how the small intestine is adapted for the absorption of digested food.

.................................................................................................................... [1 mark]

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Midterm Sains Ting 2 2013