This P6 Science CA1 paper from Nanyang (2019) covers energy, plants, electrical systems, light and shadows, materials and magnets across 64 questions worth 43 marks. Practise Science the way it's tested at P6 level in Singapore, with step-by-step answers on LearnBuddy.
The diagram below shows the human digestive system. Which of the following statements about the digestive system are correct? A Digestion is completed at part S. B Digestion is not carried out by parts Q and T. C Digested food is absorbed into the bloodstream at part T D Food is broken down into simpler substances at parts P and R.
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James wanted to investigate how the number of leaves affect the amount of water taken in by a plant, He was given 4 set-ups, P, Q, R and S. The table below shows the different conditions in each set-up at the start of his experiment. Which 2 set-ups should he use to ensure a fair test?
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Which of the following statement(s) about photosynthesis is/are correct? A Photosynthesis breaks down food to release energy. B Food made during photosynthesis is used by the plant. C Photosynthesis takes place only in cells with chloroplast.
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The diagram below shows how energy from the Sun is passed on to living things, P, Q and R. Based on the information above, which one of the following sentences is correct?
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Su Ling carried out an experiment using some water snails and hydrilla plants. Water with the same amount of dissolved carbon dioxide was used to set up the experiment as shown in the diagram below. A stopper was placed at the top of each set-up. Set-up A and set-up B were left in the sun for 2 hours while set-up C was placed in a black box for the same duration of time. At the end of the experiment, Su Ling measured the amount of carbon dioxide in each set-up again. Arrange set-ups, A, B and C, according to the amount of carbon dioxide left in each set-up.
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In the presence of light, plants are able to photosynthesise. Which one of the following correctly states what is taken in and produced during this process?
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Luke placed a plant in the dark for 12 hours. The next morning, he used the plant and set up his experiment as shown in the diagram below. Leaves A, B, C and D were each wrapped with a clear plastic bag as shown below. Each bag contains different substances as stated in the table. Luke then left the plant in the sun for 12 hours before plucking the leaves, A, B, C and D, and conducted a starch test on them. Which one of the following shows the results of the starch test?
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Which of the following ways help to conserve water? A Taking shorter showers. B Fixing water pipes that are leaking. C Switching off the lights when not in use. D Re-using water from washing vegetables to water the plants.
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The diagram below represents the water cycle. Which of the following statement(s) about the water cycle is/are correct? A Sea water loses heat during process X. B Water vapour gains heat during process Y. C Water vapour changes its state during process Y.
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Tom placed a thermometer into a beaker of crushed ice. He then heated the beaker of crushed ice for some time and recorded the change in temperature in the graph below. Based on the graph above, which of the following statements are true? A Steam was formed at point M. B The heat source was removed at point L. C Water can be observed in the beaker at point H. D Evaporation is taking place at points J and K only.
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Bala set up an experiment as shown below. He left the set-ups in a classroom at 28°C for 30 minutes and observed the readings on the weighing scales throughout the experiment. Which one of the following shows the most likely readings on the weighing scales after 30 minutes compared to the start of the experiment?
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Sam set up an experiment as shown in the diagram below and placed it under a light source for 30 minutes. He decided to make one change to the set-up and repeated the experiment again for the same duration of 30 minutes. Which of the following are the possible changes that he could have made and the most likely observed results?
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Eddie created a jumping frog toy using the following items. He glued the paper frog onto the top of one of the ring magnets and assembled the toy as shown in Figure 1. When he released the magnet, the frog jumped up as shown in Figure 2. Which one of the following correctly identifies the poles of ring magnets 1 and 2?
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The set-up below shows light from a torch shining on three shapes made of different materials. All 3 shapes are placed at different distances from the torch at points A, B and C. The experiment was repeated many times such that each shape was placed at all 3 points A, B and C each time. Which one of the following shadows cannot be observed on the screen?
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Jamilah conducted an experiment using the set-up as shown below. She recorded the time taken for the water to boil when the different materials, A, B, C and D, were placed below the beaker of water. Which of the following material is the most suitable to make a container to store ice-cream such that the ice cream inside will melt the slowest?
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The following activities involve the use of forces. A Squeezing a lemon B Wringing a wet towel C Attracting a paper clip with a magnet Which of the following activity/activities involve(s) only a pulling force?
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Ahmad overlapped the pages of two books, A and B, as shown in the diagram below. He then held book A only by the book spine and observed that book B did not fall to the ground. Which one of the following statements explains why book B did not fall to the ground?
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Declan connected the circuits in four different arrangements, A, B, C and D, as shown below. All the electrical components are working properly. In which of the arrangement(s) would there be at least one bulb that lit up?
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Study the circuit diagram below. All the electrical components are working properly. Jerry wanted only one bulb to light up. Which rod should he remove?
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Elyssa set up an electrical circuit as shown below using identical bulbs. All the electrical components are working properly. In the beginning, the metal rod was connected to point P and she realised that bulb X lit up. She then moved the position of the metal rod to point Q and compared the brightness of bulb X with that at point P. Next, she repeated the experiment by connecting the rod to point R. Which of the following statements are true?
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Which of the following are ways to conserve electricity? A Using an energy-efficient appliance B Using the fan instead of the air conditioner C Using the half flush button when flushing the toilet D Checking electrical appliances regularly for exposed wires
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Riani placed the arrow on the bow and pulled the arrow backwards. When she released the arrow, it flew forward and hit the target board as shown in the diagram below. Which one of the following shows the main energy conversion that took place from the moment Riani pulled the arrow?
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The diagram below shows Meiyin on a swing. Aisha gave Meiyin a push on the swing at point Z. Which point on the graph best represents the amount of kinetic energy that Meiyin possessed when the swing was at point Y?
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The diagrams below show 4 different objects, A, B, C and D, which are able to convert different forms of energy to electrical energy. Which one of the following identifies the form of energy that is used by each object to convert to electrical energy?
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The diagram below shows the 4 different positions of a ball as it was dropped into a pipe. The ball continued to roll until it came to a stop at point D. Which one of the following statements about the ball is correct?
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Which of the following object(s) do(es) not possess any gravitational potential energy? A A plane flying in the sky. B A ball rolling on the ground. C A balloon stuck at the ceiling.
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Xiao Qing placed 2 irregularly-shaped objects, each at the base of a 500ml beaker. She then filled each of the beakers with water to the same height as shown in the diagram below. Describe and explain what Xiao Qing can do in order to find out which of the two objects has a greater volume.
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(a) Without moving the screen state two changes that he could make to the set-up above to decrease the size of the shadow formed on the screen. (i) (ii)
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