This P6 Science SA2 paper from Henry Park (2017) covers plants, materials, light and shadows, animals and life cycles, matter and its states and cells and systems across 41 questions worth 100 marks. Practise Science the way it's tested at P6 level in Singapore, with step-by-step answers on LearnBuddy.
Study the two groups of animals, A and B, below. Which of the following describes the animals in groups A and B correctly?
Q2MCQ2 marks🖼 Visual
The diagrams below show two cells, X and Y. Which of the following statement(s) about cells X and Y is/are correct?
A: Parts R and U control the activities in the cells.
B: Parts P and S support and give the cells their shape.
C: Parts Q, S and T control the movement of substances in and out of the cell.
Q3MCQ2 marks🖼 Visual
The diagram below shows the human digestive system. Which of the following correctly describes the function(s) of organs A to F?
Q4MCQ2 marks🖼 Visual
The diagram below shows processes A and B in the life cycle of a flowering plant. Which of the following identifies both processes A and B wrongly?
Q5MCQ2 marks🖼 Visual
The diagram shows some uses of water. The diagram shows 'Water' in a central circle with three arrows: one to 'reduces ____A____ between two surfaces', one to 'helps to cool the surrounding through ____B____', and one to 'required by plants for ____C____'. Which of the following words represent A, B and C correctly?
Q6MCQ2 marks
Which of the following activities do not harm the environment?
A: Writing on both sides of a paper.
B: Turning off the lights when not in use.
C: Bringing your own bag on shopping trips.
Q7MCQ2 marks🖼 Visual
Aaron conducted an experiment using some muddy water from a pond. He placed a coin at the bottom of a container and poured in the muddy water until the coin could no longer be seen, as shown in the set-up below. Then, he recorded the height h cm of the muddy water. Aaron repeated his experiment by taking muddy water from different parts of the pond and keeping all other variables the same. His results are shown below. Aaron was trying to find out ____________________.
Q8MCQ2 marks🖼 Visual
In an experiment, a plant had been kept in the dark for 24 hours at first. It was then exposed to bright sunlight with two outer rings of the stem, X and Y, removed. The water-carrying tubes in ring X were removed but those in ring Y remained in the stem. After some time, three leaves, A, B and C, were removed from the plant and were tested for starch using iodine solution. Which one of the following sets of observation is correct for the leaves, A, B and C, when they were tested for starch?
Q9MCQ2 marks🖼 Visual
Study the diagram of a flower and the fruit below. Which of the following statements are correct after fertilisation has taken place in the flower to form the fruit?
A: P develops into S.
B: Q develops into U.
C: R withers and falls off.
Q10MCQ2 marks🖼 Visual
Substance P is a fertiliser that helps plants to grow healthily. Jeremy wanted to find out how the amount of substance P added to the plants help them grow healthily. He used three similar potted plants. Of the three potted plants he used for comparison, one of them was a control set-up. Which three of the above potted plants did Jeremy use for his experiment?
Q11MCQ2 marks🖼 Visual
Study the food web below. Which one of the organisms, P, Q, R or S, would be most affected if the flowers of the fruit tree are not pollinated and fertilised?
Q12MCQ2 marks🖼 Visual
The diagrams below show birds R and S. Based on your observation of the birds, which one of the following is most likely eaten by birds R and S?
Q13MCQ2 marks🖼 Visual
Ravi prepared four set-ups of seeds for an experiment shown in the table below. He added an equal amount of water to each set-up. What is/are the possible aim(s) of his experiment?
A: To find out if oxygen is needed for seeds to germinate.
B: To find out if warmth is needed for seeds to germinate.
C: To find out if the amount of light will affect germination of seeds.
Q14MCQ2 marks🖼 Visual
The diagrams below show the life cycle of two types of butterflies, A and B, living in the same area. These butterflies do not reproduce in the colder months between September and March. From the given information, it is most likely that ____________________.
Q15MCQ2 marks🖼 Visual
Wei Ling set up an experiment as shown below to compare the flexibility of four similar strips, A, B, C and D, each made of a different material. On each strip, she placed a container with 50 cm³ of water. The distance, d, between the highest and lowest points of the strip was measured. Her results are shown below. Based on the results of the experiment, which material is the most suitable to make part X and Y of the umbrella?
Q16MCQ2 marks🖼 Visual
Jonathan poured 50 ml of water into two identical cups, A and B. He weighed the two cups of water using similar digital weighing scale. After half an hour, he observed that water droplets were formed on the lid on both cups. Which of the following correctly shows the mass of the cups after half an hour?
Q17MCQ2 marks🖼 Visual
The arrows P, Q and R show the direction of light in the diagram below. When Danny switched on the lamp in his room, he could see the lamp and the drawers. Which arrow(s) best explain(s) why Danny could see the lamp and the drawers?
Q18MCQ2 marks🖼 Visual
John set up an experiment as shown below. What should John do to make the shadow on the screen smaller?
A: Move the torch nearer to the object.
B: Move the screen nearer to the object.
C: Move the screen further from the object.
D: Move the torch further away from the object.
Q19MCQ2 marks🖼 Visual
The diagrams below show three shapes, a square, a triangle and a circle, each made of a different material. The diagram below shows the side view of the three shapes hung at different positions, A, B and C. The shadows cast on the screen are shown below. Which of the following statements are correct?
A: The square is nearer to the torch than the circle.
B: The triangle does not allow light to pass through.
C: The square allows more light to pass through than the circle.
Q20MCQ2 marks🖼 Visual
The table below shows the melting and boiling point of four substances, W, X, Y and Z. Which of the substances, W, X, Y and Z, is/are liquid(s) at 30°C?
Q21MCQ2 marks🖼 Visual
Mrs Heng baked an ice cream dessert shown below for 10 minutes. The ice cream did not melt when it was taken out of the oven. Three children, Ali, Ben and Carol, each made a statement about the ice cream dessert as shown below.
Ali: The air bubbles reduced heat gained by the ice cream.
Ben: Using a metal container shortens the baking time.
Carol: The ice cream will eventually melt because it loses coldness to the beaten egg white and the cake.
Which of the above children are correct?
Q22MCQ2 marks🖼 Visual
Mary was conducting an experiment shown below in the Science room which had a temperature of 32°C. She measured the temperature of the water each time after adding three ice cubes. Her results are shown below. Based on the experiment, which of the following statements is correct?
Q23MCQ2 marks🖼 Visual
Matthew used a hand pump to pump more air into the basketball shown below. He observed that the size of the basketball remained the same. Which of the following statements are correct as Matthew pumped more air into the basketball?
A: Air can be compressed.
B: The volume of air increases.
C: The mass of air increases.
D: The mass of air remains the same.
Q24MCQ2 marks🖼 Visual
Rina had four magnets, W, X, Y and Z, as shown below. To compare the strength of the magnets, Rina took each of the magnets and placed them near a pile of iron pins. The table below shows the number of iron pins that was attracted by the magnets, W, X, Y and Z, from different distances. Which of the following statements about magnets W, X, Y and Z are correct?
A: Z is stronger than X.
B: Y is stronger than Z.
C: W is the weakest magnet.
Q25MCQ2 marks🖼 Visual
Ravi hung 4 metal bars, P, Q, R and S, from horizontal rods as shown below. He brought the north pole of a bar magnet near end X and then end Y of each metal bar. He recorded the observations made in the table below. He wrote the following statements after the experiment.
A: Metal bar P is made of magnetic material.
B: Metal bar R can be made into an electromagnet.
C: End X of metal bars P and S will repel each other.
D: Both ends X and Y of metal bar P will attract metal bar Q.
Which of the above statements are correct?
Q26MCQ2 marks🖼 Visual
Lee Cheng had three rods, P, Q and R, made of different materials. She placed them in various positions, A, B and C, of the circuit shown below. The results of the experiment were shown in the table below. When any of the lamps, L1, L2, L3 or L4, lit up during the experiment, a tick (✓) was placed in the box. The first result: positions A=P, B=Q, C=R gave L1✓, L2✓, L3✓ (L4 did not light). Which of the following would show the correct result if the rods, P, Q and R, were placed at different positions?
Q27MCQ2 marks🖼 Visual
A ball tied to a string swings from A to B and then C as shown in the diagram below. Which one of the following graphs shows correctly the change in potential energy and kinetic energy of the ball with height? (Key: solid line = Potential energy; dashed line = Kinetic energy)
Q28MCQ2 marks🖼 Visual
The diagram below shows a crane lifting a heavy object. What is / are the force(s) acting on the steel cables?
A: frictional force
B: gravitational force
C: elastic spring force
Q29Open-ended2 marks🖼 Visual
Study the flow chart below.
a) Plant M reproduces from spores. Which group, P, Q or R, should it be placed in? [1]
b) The fruit of plant X is placed into group R. State one physical feature of the fruit of plant X that helps in its dispersal. [1]
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Alice observed three cells, S, T and U, under a microscope. She recorded the presence of parts of a cell with a tick (✓) as shown in the table below.
a) Which of the following cells, S, T and U, is/are likely a plant cell? Give a reason for your answer. [1]
b) Based on the information, state a function that cell S is able to perform but not cell U. Give a reason for your answer. [2]
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The diagram below shows the paths taken by two main gases, R and S, in the human respiratory and circulatory systems.
a) Identify the two main gases, R and S. [1]
gas R : ____________
gas S : ____________
b) State the function of organs P and Q. [2]
Function of organ P : ____________
Function of organ Q : ____________
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Mr Li, a farmer, wanted to find out which type of plants could be grown in his farm to reduce the amount of soil being washed away during a heavy downpour. He found three plants, P, Q and R, each with different root system. The diagram shows the results of his experiment using the same amount of water poured into each of the set-ups, X, Y and Z.
a) Mr Li found out that the cup in set-up Z collected the least amount of soil. Explain how the small roots of plant R caused the least amount of soil to be collected in set-up Z. [1]
b) Mr Li planted equal number of plants, P, Q and R, each with the same number of leaves, in his farm. The length of the leaves from each plant is the same. He concluded that plant R is the most suitable plant to grow in his farm to reduce the amount of soil being washed away during a heavy downpour. Based on the information given, explain how plant R is best at reducing the amount of soil being washed away. [2]
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Tree L can conserve water and grow well in an environment with long periods of no rain. During this period, most or all the leaves fall off, leaving only the flowers as shown in the diagram below.
a) Explain how having fewer or no leaves help Tree L to conserve water during long periods without rain. [2]
b) Organism X depends on tree L for food and shelter. Tree L is the only type of tree growing in the habitat. Explain how the population of organism X will be affected if a large number of tree L is severely affected by a disease. [2]
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Hezhang conducted an experiment to find out whether dead leaves produce carbon dioxide. He set up the experiment as shown in the diagram below. Liquid H will turn from red to yellow when the amount of carbon dioxide increases.
a) Give a reason why Hezhang sealed the lid of the glass container. [1]
b) What is the colour of liquid H after a period of time? Give a reason for your answer. [2]
c) Suggest a control set-up to show that any change in colour of liquid H was caused by the dead leaves. [1]
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Crocodile S as shown in the diagram below lives in the swampy part of a river. It has strong jaws and its eyes are found on top of the head instead of the sides as seen in most fishes.
a) Explain how these features benefit crocodile S in its survival in the swampy part of the river. [2]
(i) Benefit of having strong jaws : ____________
(ii) Benefit of having eyes on top of the head : ____________
Crocodile S reproduces by laying eggs. The information shows that at a temperature between 32 and 35°C the young produced is male, and below 32 and above 35°C the young is female.
b) Based on the information, explain why the population of crocodile S will decrease on Earth due to global warming. [2]
The female crocodile S takes care of its young until they are big enough to care for themselves.
c) Besides protection from predators, suggest two other benefits for the young of some animals to live with their parents. [1]
(i) ____________
(ii) ____________
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Royston was given a 500-cm³ tank which was filled with 50 cm³ of oil as seen in the diagram below. He wanted to wash the tank. To remove all the oil completely, he turned on the tap and pumped in 80 cm³ of air at the same time. After that, he filled the tank with 200 cm³ of soap water.
a) What would be the final volume of air inside the tank? [1]
Royston filled two identical syringes with equal volume of substances A, B and C as shown in the diagrams below. He observed that the plunger in syringe Y can be pushed down but not the plunger in syringe X.
b) If substance B is a solid, what are the states of matter for substance A and C? [1]
Substance A - ____________ Substance C - ____________
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A group of students conducted a Science experiment in the Science garden. They used the set-up as shown below to remove dirt from muddy water to obtain clear water.
a) After three hours, clear water was found in the cup. Describe how clear water was obtained. [2]
b) The students observed that the amount of clear water found in the cup was greater on a hot sunny day than on a cool day. Explain why. [1]
c) Global warming gives more rainfall as it worsens. Explain why. [1]
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Lay Hoon conducted an experiment using set-ups A and B as shown below. She wrapped a glass beaker with material W and another identical glass beaker with material X. She filled both beakers with the same volume of hot water at 80°C. Lay Hoon measured the temperatures of the water at different times and recorded the data in the table below.
a) Based on the results in the table, identify the lines that represent set-ups A and B in the graph below. Write 'A' and 'B' in the box next to the line. [1]
b) What conclusion can Lay Hoon draw about the conduction of heat of material W and X? [1]
c) Which material, W or X, is more suitable for making a box to transport ice-cream from one place to another? Give a reason for your answer. [2]
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Samuel set up a circuit tester as shown below to test the electrical conductivity of four materials, W, X, Y and Z. He used each material, W, X, Y and Z, one at a time, across the connecting points and recorded his observation in the table below (Did the bulb light up? W: No, X: Yes, Y: Yes, Z: Yes).
a) Complete the classification chart below using the information from the table above. Write suitable sub-headings and the letters (W, X, Y and Z) in the boxes provided based on the information given above. [1]
Samuel next set up the circuit below. The batteries and bulbs are all working properly.
b)(i) State what will happen to bulbs A, B, D, E and F if bulb C blows. [1]
(ii) Give a reason for your answer in (i). [1]
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Jeremy wants to ride a skateboard down a ramp as shown in the diagram below. He has two skateboards, X and Y. Skateboard X has mass 2 kg and skateboard Y has mass 3 kg.
a) Which skateboard, X or Y, should he use to travel a longer distance 'd' on the ground? [1]
The following is an information article on seed dispersal: 'Barochory or the plant use of gravity for dispersal is a simple means of achieving seed dispersal. The effect of gravity on heavier fruits causes them to fall from the plant when ripe and often roll away from the plant to gain more distance. Gravity dispersal also allows for later transmission by water or animals.' The diagram shows tree M growing on a slope. The tree bears fruits of different sizes and masses: Fruit P of mass 100 g and Fruit Q of mass 300 g.
b)(i) Based on the information article, which fruit, P or Q, has a greater advantage in seed dispersal? [1]
(ii) Explain your answer using energy conversion. [2]
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The graph below shows the increase in length of two rubber ropes, K and L, when loads are hung on them.
a) Study the graph carefully and complete the table below by filling in the empty boxes. (Rubber rope K: Load = ?, Increase in length = 2; Rubber rope L: Load = 15, Increase in length = ?) [1]
Raju did bungee jumping from a bridge as shown below.
b)(i) Which rubber rope, K or L, should he use if he wants to be as near to the water as possible when he is at C? [1]
(ii) Give a reason for your answer based on the information from the graph given. [1]
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