soalan sains tingkatan 1 bab 1

etutorA Tuition Center SCIENCE MODUL 5 FORM 2 Chapter 1 & 2: The World Through Our Sense & Nutrition

Name: Date:

2 Which part of a plant shows positive phototropism?

A RootB ShootC StemD Fruit

PMR 2008

3 Which of the following sensory organs can detect touch, pain and pressure?

A EyesB NoseC EarsD Skin

PMR 2007

4 The Following information shows a type of response of a plant due to a stimulus.

Which of the following is the response?

A GeotropismB PhototropismC ThigmotropismD Hydrotropism

PMR 2006

6 The diagram shows a change in size of the pupil

Which of the following action will cause this change?

A Reading a book in a dark room

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1 Diagram 6 shows a section through part of a human head containing sensory organ.

Which of the parts labelled A, B, C or D is a sensory cell?

PMR 2008

5 The diagram shows the path of an impulse after a stimulus is received by the skin.

Which of the following represents X, Y and Z?

X Y Z

A Brain Effector ReceptorB Receptor Effector BrainC Brain Receptor EffectorD Receptor Brain Effector

PMR 2005

X ZY NerveNerveStimulus

Pupil

- shoot grows away from the stimulus- enables the plant to obtain water and minerals- roots grow towards gravitional attraction

Diagram 6


B Entering a darkroom from a bright roomC Taking off sun glasses in a bright placeD Looking at a distance object after looking at a near object.

PMR 2004

2

1 Diagram 1.1 shows how human eye can see. (PMR 2007)

Diagram 1.1

(a) (i) State one difference between object Q and image I.

_________________________________________________________________ (1 mark)

(ii) How does the size of the image I change when the eye is 10 cm from object Q?

________________________________________________________________(1 mark)

(iii) State one reason for the answer in 1(a)(ii).

________________________________________________________________

________________________________________________________________(1 mark)

(b) (i) Complete Diagram 1.2 to show the formation of an image of a distant object on the retina of the eye of a short sighted person.

Diagram 1.2

(ii) What causes the situation in Diagram 1.2 to happen?

________________________________________________________________

________________________________________________________________(1 mark)

(iii) How can the situation in Diagram 1.2 be corrected?

_______________________________________________________________(1 mark)


NUTRITION

1 Which food pyramid is the best guide to plan a balanced diet?

PMR 20082 The calorific value of rice is 15 kJ/g.

Calculate the calorific value in 100g of rice.

A 15 kJB 30 kJ

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C 1500 kJD 3000 kJ

3 The diagram shows organs in a human digestive system.

Which of the following are the functions of J, K, L and M?

4 The diagram shows a boy who is suffering from kwashiorkor disease.

Which of the following is the cause of the disease?

A Drinking too much waterB Lack of protein in the dietC Lack of calcium in the dietD Too much carbohydrate in the diet

PMR 2005

5 Which of the following pairs of food classes and examples is not correct?

Food class Example

A Protein Chicken meatB Carbohydrate NoodlesC Roughage PapayaD Fat Potato

PMR 2004

4

J K L M

A To digest starch To perform peristalsis To digest protein To digest fatB To digest starch To digest protein To digest fat To perform

peristalsisC To digest protein To perform peristalsis To digest fat To digest starchD To digest protein To digest starch To perform

peristalsisTo digest fat


1 Figure 1.1 shows the human digestive system.( PMR 2004)

Figure 1.1

(a) (i) Label one of the following structures in Figure 1.1.

(1mark) (ii) State one function of the structure in (a) (i).

_________________________________________________________________(1 mark)

(b) A student carried out a food test on sample X. Table 1.2 shows the results of the test.

Food test Observation Food class

Sample X is crushed and added with Millon's reagent

Red precipitate was formed___________________

Sample X tested on filter paper

Grease spot was formed___________________

TABLE 1.2

(i) Complete Table 1.2 by naming the food classes that are present in sample X.(1 mark)

(ii) Explain what happens to the food sample X while it is inside structure Q.

___________________________________________________________________(2 marks)

(iii) State what happens to the final product in (b) (ii).

5

Pancreas Liver Oesophagus Mouth


__________________________________________________________________

__________________________________________________________________(1 mark)

2 Figure 2.1 shows an experiment to study the action of saliva on starch. The result of the experiment after 30 minutes is shown in Table 2.2. (PMR 2005)

Figure 2.1

Test tube Presence of starchX No

Y Yes

Table 2.2

Based on Figure 2.1 and Table 2.2, answer the following questions.

(a) (i) Why must test tubes X and Y be kept in the water bath at 37oC?

_________________________________________________________________(1 mark)

(ii) State the reason why there is no starch in test tube X.

________________________________________________________________

________________________________________________________________(2 marks)

(iii) In which part of the alimentary canal does the same enzyme action occur as in the test tube X?

________________________________________________________________(1 mark)

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(b) Figure 2.2 shows pictures of several foods.

Figure 2.2

Based on the pictures, complete the table below by writing the different food classes and their food samples.

Food classes Food sample

(i) Carbohydrate Bread

(ii) ______________________________ ______________________________

(iii)_______________________________ ______________________________

(iv)_______________________________ ______________________________

(v)_______________________________ ______________________________

(vi)_______________________________ ______________________________

(5 marks)

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8

The world through our sensesPMR 20071(a)

(b)

The image I is smaller. / The image I is inverted.The image is becomes larger.The nearer the object to the lens, the larger the image. / Angle of incidence is larger.(i)

(ii) The eyeball is longer than normal./ The lens is too thick.(iii) Use concave lens or diverging lens / Laser surgeryNUTRITION

ANSWER:1. C2. C3. A4. B5. DPMR 20041(a)

(b)

(i) Label one of the following structures:- Pancreas, liver, oesophagus or mouth(ii) State one function of the labelled structure. Pancreas : Secretes enzyme / examples of enzyme Secretes hormones / examples of hormone Liver : Produces bile / remove toxins from blood / changes excess amino acids to urea / changes glucose into glycogen Oesophagus : Moves the food from the mouth to the stomach Mouth : Churns food Starch is broken down by amylase into maltose.(i) 1. Protein 2. Fats(ii) Proteins is broken down into amino acids. Fats is broken down into glycerol and fatty acids

(iii) The digested food is absorbed into the blood capillaries.PMR 20052(a)

(b)

(i) The enzyme in saliva works best at body temperature 37oC.(ii) The enzyme amylase in saliva has changed the starch to sugar.(iii) MouthFood classesFood sample

(ii) ProteinFish

(iii) Vitamins /fibreTomatoes

(iv) FatsMargarine

(v) Fibre / vitaminVegetables / fruit

(vi) Water / mineral / fats / proteinsFresh milk

ANSWER:1. B2. B3. D4. D5. D6. C

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soalan sains tingkatan 1 bab 1