Kertas soalan ini mengandungi 17 halaman bercetak

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1 Ting. 2 Nama:.. Kertas soalan ini mengandungi 17 halaman bercetak Masa : 2 jam ARAHAN : 1. Kertas soalan ini mengandungi 14 soalan. Jawab semua soalan. 2. Soalan 1 hingga 10 diperuntukkan 6 markah setiap satu. 3. Soalan 11 hingga 14 diperuntukkan 10 markah setiap satu. 4. Jawaban hendaklah ditulis dalam ruangan yang disediakan. 5. Kertas soalan ini hendaklah diserahkan kepada pengawas peperiksaan pada akhir peperiksaan. Markah : 1

2 SOALAN 1. (a) A whale is supported by its endoskeleton. Write pectoral girdles, pelvic girdles or backbone to label the parts of its skeleton. [3 marks] (b) Match the following aquatic animals with their skeleton systems. [3 marks] Animals Skeleton system Exoskeleton Endoskeleton Hydrostatic skeleton 2

3 2 (a) Diagram 1 shows a few types of food Diagram 1 On Diagram 1, tick ( ) the correct alphabet to show the foods that need to be consumed in a small quantity by a diabetic patient. [3 marks] (b) Tick ( ) the correct functions of the food labelled B.. [2 marks] Promotes healthy eye function Essential for growth of new cells Essential for blood clotting Essential for formation of enzymes and hormones (c) Foods in X are rich in vitamin B and C while foods in Y are rich in vitamin A, D, E and K. X Y Tick ( ) one difference between the solubility of vitamins from sources X and Y. [1 mark] Vitamins from X are water-soluble while vitamins from Y are fat-soluble. Vitamins from X are fat-soluble while vitamins from Y are water-soluble. 3

4 3. Diagram 2 shows three states of matter. Diagram 2 (a) On the diagram 2, tick ( ) the correct processes and tick ( X ) for the wrong processes. [2 marks] (b) Does heat is absorbed in the following processes? Write Yes or No in the box provided. Evaporation Freezing [2 marks] (c) Diagram 3 shows two processes, X and Y. Write True or False for the following statements regarding processes X and Y. Diagram 3 Process X takes place at any temperature whereas process Y takes place at 100 C. Process Y is influenced by humidity and air movement. [2 marks] 4

5 4. Diagram 4 shows the cross-section of the human eye. Diagram 4 a)name the parts in Diagram 4 using the words given in the box below. (3 marks) Cornea Iris Optic nerve (b) Match the following situations with the conditions of the eyes. When we enter a dark room When we are looking at near objects When the image of objects cannot be detected (3 marks) 5

6 5 (a) Duck and penguin are birds. Their bodies are covered with feathers. What is the advantage of these birds for having feathers? [2 marks] (b) Whales are the largest aquatic animals that live in the ocean. i) This animal is not considered as fish. Explain. (3 marks) (ii) Give another aquatic animal which has the same characteristic as the whales. [1 mark] 6.Diagram 5 shows a device that applies the principle of air pressure. Diagram 5 6

7 (a) (i) Name the device. (ii) State one use of the device. (1 mark) [1 mark] (b) (i) What will happen to the air pressure in the cylinder, when the piston is pushed inwards? (1 mark) (ii) State one inference for the answer in (b)(i). (1 mark) (c) What will happen to the air pressure at P, when the piston is pushed inwards? [1 mark] (d) Based on Diagram 5, what will happen if there is a hole at point Q? [1 mark] 7. Diagram 6 shows few organisms interacted with each other in a maize field. Diagram 6 (a) Name the producer and the secondary consumer in this field. [2 marks] (b) State the effect on ecosystem if all snakes are killed. [1 mark] 7

8 (c) Food web is a network of a few food chains related to each other in an ecosystem. Diagram 7 shows the food web in a field. Diagram 7 (i) How many food chains are there in this food web? [1 mark] (ii) State the main source of energy in this food web. [1 mark] (iii) Construct a food chain based on the food web in the diagram above. [1 mark] 8. (a) Diagram 8 shows a climber climbing a hill. Diagram 8 (i) Name two forces that help the climber move upwards. [2 marks] (ii) State two uses of the forces state in (a)(i) in our everyday lives. [2 marks] 8

9 (b) Diagram 9 shows a car moving at high speed. Diagram 9 (i) What will happen to the tread or surface of the tyre when the driver brakes suddenly? [1 markl (ii) State one advantage of using tyres with thick tread. [1 mark] 9. The diagram shows an old person using a walking stick to assist him in walking. (a)why do you think the old person needs to use a walking stick to walk? (1 mark ) b) Siti wants to carry out an experiment to study how the centre of gravity affects the stability of an object. The diagram below shows two different models, P and Q, which are built from cork and pins. The two models are placed on a wooden board. (i) When the wooden board is tilted, model Q will fall first. Explain why. (1 mark ) 9

10 (ii) How can Siti make model Q more stable? (1 mark ) (c) (i) How does a giraffe increase its stability while drinking water from a river? (1 mark ) (ii) Why is a crocodile more stable than a giraffe? [2 marks] 10. Ainul wants to open a biscuit tin. She has a metal spoon and a 50-sen coin. (a) Why it is easier for her to open the lid of the biscuit tin with the spoon instead of the coin? [2 marks] (b) If Ainul has a long metal spoon and a short metal spoon, which spoon will make it easier to open the lid? Explain why. [2 marks] (c) The diagram below shows a wrench used to unscrew a nut. State two ways to unscrew the nut more easily. [2 marks] 10

11 11. The diagram below shows two syringes, P and Q before and after being compressed. Syringe P is filled with substance A and syringe Q is filled with substance B. (a) (i) Write the state of matter for substance A. [1 mark] (ii) State one step to increase the pressure in syringe Q. [1 mark] (iii) Explain why substance A is harder to be compressed compared to substance B. (2 marks) (b) Based on the principle of air pressure. (i) explain how air is sucked out of a beverage carton by using a straw. (2 marks) 11

12 (ii)explain how a plunger can be used to clear pipes that are blocked. [4 marks ] 12. A student is investigating about the temperature of liquids. A thermometer is used to measure the temperature of liquid A retort stand is used to hang the thermometer and the bulb of the thermometer is ensured not to touch the base of the beaker The beaker is filled with distilled water and heated The temperature of the water is recorded every 2 minutes for 10 minutes 12

13 (a) (i) Write down temperature of the distilled water before experiment based on the diagram. (1 mark) (ii) Based on the graph, predict the temperature of distilled water at the 12th minute. (1 mark ) (iii) Complete the graph of temperature against time below, based on the answer in (a). (2 marks) (b) What is the relationship between the temperature and time in this investigation? (1 mark) (c) The student repeated this investigation by adding salt in the distilled water. Table below shows the results. Time/ min Temperature / C (i)boiling point is the temperature at which the vapour pressure of the liquid is equal to the atmospheric pressure and the change in the state of matter occurred. What is the boilng point of distilled water? (1 mark) 13

14 (ii) Based on the table, what is the possible boiling point of salt solution? (1 mark) (iii) Compare the boiling point of distilled water and salt solution. (1 mark) (d) What is impurity? Explain the effect of impurities on the boiling point of distilled water. 13. A health agency has issued an article about diseases caused by cholesterol. Causes of High Cholesterol in the Body Food Eating too much fat such as animal fat for example, beef, milk, eggs, butter and cheese. Body weight The body weight affects the cholesterol content in the body. If you are overweight, the risk of high cholesterol is great. Daily activities The activities in life influence the health of our bodies. If we do not like to carry out exercise, our cholesterol levels will increase and this will lead to weight gain. Ancestry People who have hereditary high cholesterol will have the potential for high cholesterol. (2 marks) (a) Animal fat contains a high percentage of saturated fat. Why is saturated fat bad for the body? ( 3 marks) 14

15 (b) The diagram below shows a child eating junk food. Explain what may happen to the boy if his diet continues. ( 3 marks ) (c)if you were a doctor, what advice would you give to your patients who are suffering from high cholesterol in the blood? ( 4 marks ) 15

16 14. The magnitude of friction produced is different based on types of surface. A student investigates the effect of friction by using the apparatus below. The following are the steps of the investigation: Step 1: The wooden block is placed on a glass table. Step 2: The spring balance if pulled. The reading on the spring balance is read as soon as the block starts to move. Step 3: Steps 1 and 2 are repeated on a wooden and plastic tables. (a) What happens if friction does not exist? [2 marks] (b) What will happen if the wooden block is placed on a carpeted surface? [1 mark] 16

17 (c) Table below shows the reading of spring balance on different surfaces. Surface Reading of spring balance / Newton (N) Glass 4 Wood 9 Plastic 6 (i) Draw a bar chart to show the readings of the spring balance on different surfaces. (2 marks) (ii) Explain the relationship between the types of surface with the magnitude of friction. [1 mark] d) You want to investigate the objects that can reduce and increase friction. State the objects that apply friction and classify based on their functions. (4 marks) Classification Objects End of questions paper