1. Which one of the following observations is matched correctly to the characteristic of living things?

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Aubrey Wade
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1 Section A (28 x 2 = 56 marks) For each question from 1 to 28, four options are given. One of them is the correct answer. Make your choice (1, 2, 3 or 4). Shade the correct oval (1, 2, 3 or 4) on the Optical Answer Sheet. 1. Which one of the following observations is matched correctly to the characteristic of living things? Observation Characteristic (1) A chicken lays eggs. Living things can grow. (2) A tadpole turns into a frog. Living things can reproduce. (3) A flying squirrel glides between trees. Living things need air, food and water. (4) A boy slaps a mosquito on his arm but it flies away. Living things can respond to changes. 2. Study the diagram below. egg adult nymph Which of the following animals have a life cycle similar to the above? A: Butterfly B: Cockroach C: Grasshopper D: Mealworm beetle (1) A and B only (2) B and C only (3) C and D only (4) A, C and D only

2 3. Li Ming carried out an experiment with a flower of a plant as shown below. A B C D The flower did not produce any seeds after she removed one part of it. Which part of the flower, A, B, C or D, did Li Ming remove? (1) A (2) B (3) C (4) D 4. The diagram below shows the fruits, X and Y, of two plants. soft hair hooks X Y How is each fruit, X and Y, dispersed? X Y (1) Wind Animals (2) Wind Splitting action (3) Animals Splitting action (4) Animals Animals 2

3 5. The diagram below shows the processes in the life cycle of a flowering plant. E Germination F G Which one of the following represents the missing processes E, F and G? E F G (1) Fertilisation Seed Dispersal Pollination (2) Seed Dispersal Pollination Fertilisation (3) Pollination Fertilisation Seed Dispersal (4) Seed Dispersal Fertilisation Pollination 6. The arrow in each of the diagrams below shows the transfer of pollen grains between two flowers. Which of the following shows how pollination takes place between the two flowers correctly? (1) (2) (3) (4) 3

4 7. Heredity is the passing down of characteristics from parents to their young. Which of the following statements about heredity are true? A: The young can inherit traits from both parents. B: A female parent cannot pass her traits to a male child. C: Heredity helps one to know of one s family health history. D: Inherited traits sometimes do not show in one generation but may reappear in the next generation. (1) A and D only (2) B and C only (3) A, C and D only (4) B, C and D only 8. Study the classification table below. Organ Systems P Q R Heart Rib cage Blood vessels Nose Lungs Windpipe Skull Spine Which one of the following parts of the body is wrongly matched to the organ systems, P, Q and R? (1) Lungs (2) Rib cage (3) Windpipe (4) Blood vessels 4

5 9. Rafiq and his group members made a model of the human respiratory system with four main parts using the objects as shown below. plastic bottle cap with a hole on top open base tape Part A drinking straws Part B opening rubber sheet Part C balloons Part D string Match parts A, B, C and D correctly to the parts of the respiratory system. Parts A B C D (1) chest air tubes lungs muscle (2) chest lungs air tubes muscle (3) muscle air tubes lungs chest (4) muscle lungs air tubes chest 5

layer of oil water layer of oil roots wrapped in plastic bag water h Set-up M Set-up N Set-up P Set-up Q At the end of the experiment, Farah measured the height of water, h,

6 10. Farah placed four plants of the same type in identical jars, each containing water at the same level as shown below. She then placed the four set-ups, M, N, P and Q, next to the window for an hour. layer of oil water layer of oil roots wrapped in plastic bag water h Set-up M Set-up N Set-up P Set-up Q At the end of the experiment, Farah measured the height of water, h, in each jar. Which of the following shows correctly the height of the water in each of the above set-ups? Height of water in Set-up M (mm) Height of water in Set-up N (mm) Height of water in Set-up P (mm) Height of water in Set-up Q (mm) (1) (2) (3) (4)

7 11. Mariya watered a potted plant and placed it into a black plastic bag. She tied the bag with a string and placed it in the field from 3 p.m. to 9 p.m.. string black plastic bag potted plant Which of the following graphs shows correctly the changes in the amount of oxygen and carbon dioxide in the bag during that period of time? (1) (2) carbon dioxide Amount of gas oxygen Time (3) (4) Amount of gas carbon dioxide oxygen Amount of gas Amount of gas carbon dioxide oxygen Time oxygen carbon dioxide Time Time 7

8 12. The diagram below shows the parts, S, T, U and V, of the digestive system of a human body. S A T U V A man ate peanut porridge at six o clock in the morning on an empty stomach. Which of the following graphs most likely shows the correct amount of undigested food left in each part of his digestive system after five hours? (1) (2) Amount of undigested food (g) Amount of undigested food (g) S T U V Parts of digestive system S T U V Parts of digestive system (3) (4) Amount of undigested food (g) Amount of undigested food (g) S T U V S T U V Parts of digestive system Parts of digestive system 8

13. The set-up below is to find out the amount of coloured water

9 13. The set-up below is to find out the amount of coloured water that can be absorbed by four similar-sized strips of different materials, W, X, Y and Z. After ten minutes, the strips absorb water to different levels as shown in the diagram below. W X Y Z ruler clamp coloured water Which one of the materials is most suitable for making a bath towel? bath towel (1) W (2) X (3) Y (4) Z 9

10 14. An experiment was carried out as shown in the diagram below to test the strength of a material. Three 100 g weights were stacked on the material, one at a time, until it broke. 100 g 100 g 100g g weight span weights material pillar What change could be made so that the material can withstand heavier weights before breaking? (1) Decrease the span of the pillars. (2) Increase the height of the pillars. (3) Increase the length of the material. (4) Decrease the mass of each weight. 15. James brings a magnet near a metal ball and observes the following. magnet metal ball the ball rolls away What can he conclude about the metal ball? A: It is a magnet. B: It is made of a non-magnetic material. C: It is made of a magnetic material. D: It is not a magnet. (1) A and B only (2) A and C only (3) B and D only (4) C and D only 10

11 16. A paper clip is moved towards a bar magnet slowly. The distance at which the paper clip is attracted to the bar magnet is measured. Then the bar magnet is replaced with another bar magnet of a different size and the process is repeated. The results are recorded in the table below. distance distance paper clip bar magnet Bar magnet Distance (cm) D 3 E 2 F 1 G 3 H 4 What can be concluded from the experiment as shown above? (1) The shortest magnet has the least magnetic strength. (2) The biggest magnet has the strongest magnetic strength. (3) The size of a magnet does not affect its magnetic strength. (4) The longer the distance at which the paper clip is attracted by the magnet, the weaker the magnetic strength of the magnet. 11

12 17. Mr Chen is conducting an experiment to make an electromagnet using electricity. The diagram below shows how the set-up looks like midway through the experiment. battery wire steel ruler How can Mr Chen increase the magnetic strength of the electromagnet? (1) Use a shorter steel ruler. (2) Add a switch to the circuit. (3) Add more coils around the steel ruler. (4) Use a copper ruler instead of the steel ruler. 18. Priya had three identical containers, A, B and C, in her room. The room temperature was 28 C. She poured an equal amount of water into containers A and B as shown in the diagram below. water Container A Temperature of water: 5 C Container B Temperature of water: 85 C Container C What would the temperature of water in container C be immediately after she poured the water from both containers A and B into container C? (1) The temperature of water in container C would be 85 C. (2) The temperature of water in container C would be higher than 85 C. (3) The temperature of water in container C would be higher than 5 C but lower than 85 C. (4) The temperature of water in container C would be at the same temperature as the room. 12

19. Mei Ling found two glasses, X and Y, stuck together as shown in the diagram below.

(1) Pour hot water into glass X and put glass Y in hot water.

(3) Pour hot water into glass X and put glass Y in cold water.

13 19. Mei Ling found two glasses, X and Y, stuck together as shown in the diagram below. The two glasses were not easily separated. glass X glass Y What could she do to separate the two glasses? (1) Pour hot water into glass X and put glass Y in hot water. (2) Pour cold water into glass X and put glass Y in hot water. (3) Pour hot water into glass X and put glass Y in cold water. (4) Pour cold water into glass X and put glass Y in cold water. 20. Jayden shines the torch on a wooden cone as shown in the diagram below. wooden cone white screen lit torch table top Which one of the following is likely to be the shadow that Jayden will observe on the white screen? (1) (2) (3) (4) 13

14 21. The diagram below shows the glass panes of a window. glass pane We can see the trees on the other side of the glass panes because. A: light from the sun enters our eyes B: the glass panes reflect all the light C: light that falls on the trees is reflected into our eyes D: glass allows most of the light that falls on it to pass through (1) A and B only (2) B and C only (3) B and D only (4) C and D only window 22. Noreen drew a diagram showing the water cycle as shown below in her Science Journal. Q Water vapour R Cloud Water body P Rain Which one of the following is correct? Evaporation occurred at Condensation occurred at (1) P Q (2) P R (3) Q R (4) R Q 14

15 23. Study the flowchart below. Matter Yes Does it have a definite shape? Yes Does it have a definite volume? Yes D No No A Can it be compressed? Yes C No B Which of the following items best represent A, B, C and D respectively in the flowchart above? A B C D (1) milk brick wind music (2) wind shadow brick milk (3) music milk wind brick (4) shadow wind milk brick 15

24. Clarisse conducted an experiment to find out if the temperature of water affects the rate of evaporation. She recorded the conditions in the table below.

16 24. Clarisse conducted an experiment to find out if the temperature of water affects the rate of evaporation. She recorded the conditions in the table below. Set-up Exposed surface area of water (cm 2 ) Temperature of water ( o C) Amount of water (ml) D E F G H Which pair of set-ups shown in the table above could she use to compare in order to form a conclusion? (1) D and E (2) E and H (3) F and G (4) F and H 25. Anna made two different shapes, one at a time, using the same play dough. play dough Mass: 48 g Volume: 18 cm 3 She measured the mass and volume of each shape. She recorded her results in a table. Which of the following shows the correct results? (1) Shape of play dough Mass (g) Volume (cm 3 ) Ball Cake (2) Shape of play dough Mass (g) Volume (cm 3 ) Ball Cake (3) Shape of play dough Mass (g) Volume (cm 3 ) Ball Cake (4) Shape of play dough Mass (g) Volume (cm 3 ) Ball Cake

26. Mdm Nuraini conducted an experiment using four identical mirrors and four identical containers with the same amount of water of different temperatures.

17 26. Mdm Nuraini conducted an experiment using four identical mirrors and four identical containers with the same amount of water of different temperatures. She set up the apparatus as shown below to observe condensation taking place in a room with a constant temperature of 28 C. mirror mirror mirror mirror 70 C 50 C 30 C 90 C Set-up A Set-up B Set-up C Set-up D In which set-up, A, B, C or D, would the greatest number of water droplets be seen on the surface of mirror which is facing the container of water after two minutes? (1) Set-up A (2) Set-up B (3) Set-up C (4) Set-up D 27. Colin soaked four similar T-shirts, Q, R, S and T, in a basin of water. Each T-shirt was soaked with an equal amount of water. He then arranged the T-shirts on a table as shown in the diagram below. Q R S T table What measurement should Colin take in order to find out how the size of the exposed surface area affects the rate of evaporation of water? (1) Temperature of the surrounding air. (2) Temperature of each T-shirt after five hours. (3) Difference in mass of the T-shirts after five hours. (4) Difference in the size of the exposed surface area of the T-shirts. 17

18 28. Mrs Tay filled a kettle with tap water and started to boil it on an electric stove. After a few minutes, the water started to boil. The water continued to boil for a few minutes before she turned off the electric stove. She waited for a while before pouring the water into a thermal flask to keep it hot. The graph below represents the change in the temperature of the water over a period of time. Temperature of water ( C) A B C D 0 Time (min) Based on the graph above, which one of the following correctly describes the cause of the changes in the temperature of the water? From A to B From B to C From C to D (1) Heat gain Heat gain Heat loss (2) Heat gain No heat gain and loss Heat loss (3) Heat loss Heat gain Heat gain (4) Heat loss No heat gain and loss Heat gain 18

(S)* 2. The table below shows Linda s answers to three questions about ferns.

(S)* 2. The table below shows Linda s answers to three questions about ferns. Section A For each question from 1 to 16, three options are given. One of them is the correct answer. Make your choice (1, 2 or 3 ). Shade your answer on the Optical Answer Sheet. (16 x 2 = 32 marks) (S)*