This P6 Science SA1 paper from Catholic High (2014) covers plants, the human body, heat and temperature, animals and life cycles, food chains and the environment and cells and systems across 44 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 classification chart below.
Which of the following headings do A, B and C represent?
Q2MCQ2 marks🖼 Visual
Zenon fixed one end of a ruler A to a table and hung a weight on the other end. He then observed how far the ruler could be bent, just before it broke, by measuring the distance d, as shown in the diagram below.
Zenon repeated the above experiment with three other rulers, B, C and E, and recorded his results in the table below.
Arrange the rulers according to their flexibility, starting with the most flexible to the least flexible.
Q3MCQ2 marks🖼 Visual
Each letter in the diagram below represents a stage in the life cycle of a mealworm beetle.
Which of the following statements are true if G represents the adult stage?
A At Stage H, it has developed wings.
B At Stage G, it spends most of its time eating.
C At Stage E, it moults several times as it grows.
D At Stage F, it does not move around and does not eat.
Q4MCQ2 marks🖼 Visual
Lionel did some findings on the seeds of the Rose of India fruit and presented them in the table below. The seeds of the Rose of India were dispersed by wind after the Rose of India fruit split open.
He then dropped seeds A, B, C and D, one at a time, from a fixed height above the ground and recorded the distance travelled by each seed.
Which of the following most likely shows Lionel's results?
Q5MCQ2 marks🖼 Visual
Meiling placed seeds in 4 test tubes of the same size, P, Q, R and S. Test tubes P, Q and S were kept in a room with temperature of 30°C while test tube R was kept in a black box with temperature of 30°C. The 4 test tubes were exposed to different conditions as shown in the diagram below.
In which of the above test tubes would the seeds most likely to germinate?
Q6MCQ2 marks🖼 Visual
The diagram below shows a female reproductive system.
Which of the following statements are true?
A M and N are the ovaries.
B L provides nutrients to the foetus.
C M can still produce eggs if N is removed.
D O is the place where a fertilized egg will develop into a foetus.
Q7MCQ2 marks🖼 Visual
Look at the diagram of a human digestive system below.
Which of the following correctly shows what happens at W, X and Y?
Q8MCQ2 marks🖼 Visual
The diagrams below show the circulatory systems of two organisms, a man and a fish. The arrows represent the blood vessels that carry blood around the body.
Based on the diagrams above, which of the following statements is/are correct?
A Only blood vessels O, P and Y carry blood with less oxygen.
B Oxygen-rich blood from the heart goes to the gills of the fish.
C Only blood vessels M, N and X carry blood with more oxygen.
Q9MCQ2 marks🖼 Visual
Lucien placed three plants of the same species in identical beakers. Each beaker contained an equal amount of water as shown in the diagram below. He placed set-ups W, X and Y near a window for a day.
He then recorded the amount of water left in each beaker at the end of his experiment.
Which one of the following graphs below shows the correct height of water level in set-ups W, X and Y at the end of the experiment?
Q10MCQ2 marks🖼 Visual
The amount of different gases in the air is shown in the pie chart below.
Which of the statements are true?
A Plants take in R during respiration.
B Plants produce P during photosynthesis.
C Animals only breathe out R during gaseous exchange.
D Animals breathe in P, Q and R during gaseous exchange.
Q11MCQ2 marks🖼 Visual
Four pupils observed some plant and animal cells under a microscope. They recorded their observations and their findings in the table below.
Which of the children made the correct conclusions?
Q12MCQ2 marks🖼 Visual
Joel carried out an experiment to see how the amount of oxygen taken in during respiration affects the rate of photosynthesis in a plant. Which of the following correctly shows the results of his experiment if he had carried out a fair test?
Q13MCQ2 marks🖼 Visual
Hendric counted the number of organisms in a pond community and recorded the findings below.
Which of the following statements about the organisms in the pond community is true?
Q14MCQ2 marks🖼 Visual
The characteristics of Environment P are listed in the table below.
The table below shows the characteristics of the preferred habitats of 3 organisms, A, B and C.
Which of these organisms, A, B or C, could live in Environment P?
Q15MCQ2 marks🖼 Visual
Study the food web shown below.
Which organisms would be most badly affected over a long period of time if all the rabbits are removed from the food web?
A Plant
B Snake
C Squirrel
Q16MCQ2 marks🖼 Visual
The pictures below show some adaptations which animals use to cope with the extreme temperature in their environment.
A Fennec fox has big oversized ears.
B Camel urinates very little.
C Polar bear has small ears.
D Grizzly bear hibernates.
E Emperor penguins huddle together in groups.
Which of the following are examples of behavioural adaptations of animals to cope with the extreme temperature in their environment?
Q17MCQ2 marks🖼 Visual
The table below shows the freezing points of three substances, A, B and C.
Based on the above information, which one of the following is correct?
Q18MCQ2 marks🖼 Visual
Oliver set up an experiment in a classroom as shown below.
Which of the following would most likely result in a drop in the temperature of air inside the small pot?
A Use a dry cloth to cover the pot.
B Add cold water to the wet sand.
C Place a fan in front of the set-up.
D Add warm water to the wet sand.
Q19MCQ2 marks🖼 Visual
The diagram below represents the changes in the states of water.
Which of the following do A, B, C and D represent?
Q20MCQ2 marks🖼 Visual
Patrick set up an experiment at room temperature as shown in the diagram below.
What would most likely happen after some time?
Q21MCQ2 marks🖼 Visual
Jacob carried out an investigation to find out if objects, A, B, C and D, allow electricity to pass through the electrical circuit as shown below.
He repeated the same experiment using objects, B, C and D. The four objects, A, B, C and D, are made of different materials but are similar in size and thickness. Jacob recorded the results in the table shown below (A: bulb lights up Yes; B: No; C: Yes; D: No).
Which of the following shows the materials which objects A, B, C and D are made of?
Q22MCQ2 marks🖼 Visual
Ronald was asked to suggest how four bulbs could be arranged. All bulbs were initially lit. The table below shows which bulbs would continue to light up when one of the bulbs had fused (Fused A → None; Fused B → A, C and D; Fused C → A, B and D; Fused D → None).
Based on the information above, which one of the following circuit diagrams is correct?
Q23MCQ2 marks🖼 Visual
Circuits C, D and E are made up of similar batteries and bulbs.
Which of the following shows the correct order of bulbs arranged from the brightest to the least bright bulbs?
Q24MCQ2 marks🖼 Visual
Kienan set up an experiment as shown below using object E (a torch shining onto object E, with a light sensor connected to a datalogger behind it).
He repeated the same experiment using objects F, G and H. The four objects, E, F, G and H, are made of different materials but are similar in size and thickness. He recorded the amount of light picked up by the light sensor connected to the datalogger as shown in the table below (E=350, F=400, G=150, H=0 lux).
What was the aim of Kienan's experiment?
To find out how ____.
Q25MCQ2 marks🖼 Visual
Faridah put a glass of ice cubes into a basin of hot water as shown below.
Which of the following items will experience a rise in temperature (gain in heat)?
A Basin
B Glass
C Hot water
D Ice cubes
Q26MCQ2 marks🖼 Visual
The graph below shows the increase in length of two springs, P and Q, when loads were hung on them. The original length of both springs is 2 cm.
What is the length of Spring P when a weight of 5g is hung on it?
Q27MCQ2 marks🖼 Visual
Based on the graph above, which one of the following statements is true?
Q28MCQ2 marks🖼 Visual
When Desmond shot an arrow from a bow, the arrow propelled forward and upward before falling to the ground. The path of the arrow is shown in the diagram below.
What energy changes occurred when the arrow was released to propel the arrow up to the greatest height, C?
Q29MCQ2 marks🖼 Visual
The diagram below shows three cubes, W, X and Y, being held next to one another as shown below (in a row W, X, Y touching). However, when the cubes are released, cube Y is being pushed away while cubes W and X are attracted to each other.
Which one of the following statements about the cubes is correct?
Q30MCQ2 marks🖼 Visual
A wooden box needs to be moved from position M to N, as shown in the diagram below.
Which one of the following must happen for the box to move from position M to N?
Q31Structured3 marks🖼 Visual
Jess was at the Gardens by the Bay and she made the following observations of the characteristics of four flowers, J, K, L and M, as shown in the classification chart. Jess also spotted an animal pollinator with the characteristics listed in the table below (Active in the day; Prefers bright red flowers).
(a) Based on Jess' observations, which flower, J, K, L or M, is most likely to be pollinated by the animal pollinator? Write your answer in the box below. [1]
(b) Jess walked around the garden and saw an insect flying from a flower in plant Y to a flower in plant X of the same species. Based on the diagram above, will the young plants that develop from the seeds of Plant X contain only the characteristics of the parent plant X? Explain. [2]
Sign up free to write your answer — AskBuddy AI will mark it instantly and explain where you went wrong.
Mr Tan removed a ring of bark from a tree as shown in the diagram below. After a few days, he found a swelling above the stripped area with a liquid leaking from it.
(a) What has been removed from the trunk together with the bark? [1]
(b) Would the tree survive after a month? Explain your answer. [2]
Sign up free to write your answer — AskBuddy AI will mark it instantly and explain where you went wrong.
The drawing shows a plant called Tillandsia.
(a) The leaves of these plants absorb sunlight. Why do plants need light? [1]
(b) Tillandsia plants grow on the high branches of trees in rain forests. Explain why these plants cannot grow well on the lowest branches of trees. [1]
Sign up free to write your answer — AskBuddy AI will mark it instantly and explain where you went wrong.
Bob is a dancer.
(a) As Bob dances, his breathing changes because he needs more oxygen. The graph below shows how oxygen in his lungs changes when he dances. From the graph, state two ways his breathing changes as he dances. [2]
(i) ____
(ii) ____
(b) Bob's muscle cells produce carbon dioxide as he dances. Write the path taken by the carbon dioxide as it travels from his muscle cells to leave the body. [1]
muscle cells → blood → ____ → ____ → nose
Sign up free to write your answer — AskBuddy AI will mark it instantly and explain where you went wrong.
Katy carried out an experiment to find out how the height of three similar plants was affected by the amount of light they had been exposed to for a period of time. The results were recorded in the table below (Dim: start 2.5, end 3.5; Bright: start 2.1, end 3.8; Very bright: start 2.0, end 4.4).
(a) Explain how the amount of light can affect the height of a plant in the experiment above. [1]
(b) Suggest how the above experiment can be improved to ensure more reliable results. [1]
Sign up free to write your answer — AskBuddy AI will mark it instantly and explain where you went wrong.
The food web below consists of organisms found in a certain habitat.
(a) Which organisms, A, B, C, D, E or F, are both predator and prey? [1]
(b) Which organism, A, B, C, D, E or F, in the food web has the largest population? [1]
(c) Organism G is an animal that is a predator of B and a prey of F. Write the letter 'G' and draw the appropriate arrows to show organism G's place in the food web above. [1]
Sign up free to write your answer — AskBuddy AI will mark it instantly and explain where you went wrong.
Some organisms live in the same habitat because they need one another for survival.
(a) Organism P is a flowering plant and organism Q feeds on nectar. What are the benefits of organisms P and Q to each other?
(i) Benefit of organism P to Q: ____ [1]
(ii) Benefit of organism Q to P: ____ [1]
(b) Organisms A and B live in the same habitat. Organism A is blind and digs a hole for itself while organism B, on spotting a predator, darts about and hides from predators in organism A's hole. This alerts organism A to the danger. Explain how organism B benefits organism A. [2]
Sign up free to write your answer — AskBuddy AI will mark it instantly and explain where you went wrong.
The diagram shows trees that grow in countries with heavy snowfall. They have many structural adaptations to help them cope with the low temperatures and heavy snowfall.
(a) After a heavy snowfall, snow accumulates on the branches of trees and might break the branches. Explain how the shape of the trees above helps to prevent this from happening. [2]
(b) During the winter season, the ground is frozen and very little water is available to trees. The diagram below shows the leaves of the above trees. How are the leaves structurally adapted to prevent water loss? [2]
Sign up free to write your answer — AskBuddy AI will mark it instantly and explain where you went wrong.
Joseph wanted to find out the rate of evaporation at different times of a day. He filled 3 similar containers with 800 ml of water each and placed one container at the same location at different time periods of the day. At the end of each time period, the amount of water left in the container was recorded in the table below (7 a.m.–9 a.m.: 740 ml; 1 p.m.–3 p.m.: 680 ml; 7 p.m.–9 p.m.: 760 ml).
(a) Based on the results of the experiment, what is the relationship between the surrounding temperature and the rate of evaporation? [1]
(b) Based on the results, state an appropriate time period to hang your wet clothes out to dry. Explain your answer. [2]
Sign up free to write your answer — AskBuddy AI will mark it instantly and explain where you went wrong.
Samuel filled two identical metal cans with 250 cm³ of hot water and wrapped strips of metal of different sizes around them as shown below. He recorded the temperature of the water in each can every 5 minutes. The table below shows his results (at 0 min both 80°C; at 20 min Can A = 55°C, Can B = 62°C, with Can A always lower).
(a) Based on the experiment above, explain why the water in Can A cooled faster than the water in Can B. [2]
(b) Rabbits keep cool by losing heat from their ears. Which rabbit can lose more heat through its ears? Give a reason for your answer. [1]
Sign up free to write your answer — AskBuddy AI will mark it instantly and explain where you went wrong.
Daniel made an electromagnet as shown below. He used a sensor to measure the strength of the electromagnet. He placed the sensor 3 cm from the magnet and increased the number of batteries. He repeated the experiment with the sensor 5 cm from the electromagnet. The graph below shows his results.
(a) How did the distance of the sensor from the electromagnet affect the reading on the sensor? [1]
(b) What else can Daniel do to the electromagnet to increase its strength? [1]
Sign up free to write your answer — AskBuddy AI will mark it instantly and explain where you went wrong.
Carl placed a steel block, S, at the top of a ramp as shown in the diagram below. When Carl let go of the block, it slid down the ramp and came to rest at position X.
(a) Other than friction, name another force acting on the block. [1]
When object A was placed at a point below the ramp as shown in the diagram below, block S took a shorter time to move down the ramp and came to rest at position Y.
(b) What could object A be? How did it affect the time taken for steel block S to reach position Y on the ramp? [2]
(c) Carl wanted steel block S to take an even shorter time to reach position Y on the ramp. Without changing the set-up or the position of steel block S, suggest one way for Carl to make the steel block S take a shorter time to reach position Y. [1]
Sign up free to write your answer — AskBuddy AI will mark it instantly and explain where you went wrong.
Alvin conducted an experiment to find out what happens when objects are dropped from different heights. He dropped 2 identical objects, P and Q, from different heights. Object P was dropped from 20 cm and object Q from 100 cm. 2 identical tiles were placed on the floor just below each object. Tile Y broke when object Q landed on it but tile X did not break when object P landed on it.
(a) Complete the energy conversion of object Q from the point it was released to when it landed on tile Y. [1]
Gravitational potential energy of object Q → Kinetic energy + Gravitational potential energy of object Q → kinetic energy + ____ energy + ____ energy of broken tile Y
(b) Based on the experiment, why is it more dangerous when an object is dropped from a high-rise building as compared to a low building? [1]
Sign up free to write your answer — AskBuddy AI will mark it instantly and explain where you went wrong.
The diagram shows two bumper cars at a carnival. When the rider steps on the pedal, the circuit is closed. Therefore, the bumper car moves. The circuit symbols for the motor and pedal for each car are shown in the diagram.
(a) Bumper cars are connected using parallel circuits. Complete the circuit diagram below to show how the two bumper cars are connected. [1]
(b) The operator looks after the bumper cars during the rides. Why does the man not get an electric shock as he walks across the metal floor? [1]
Sign up free to write your answer — AskBuddy AI will mark it instantly and explain where you went wrong.
