P6 Science SA2 2012 — Catholic High

Simon observed the grasshopper as it developed from an egg to an adult. He represented his findings in the data below. How many days are there in the nymph stage of the grasshopper?

The diagram below shows the fruit of a plant. Some students made the following statements about this fruit. A: It has edible parts. B: It has many flowers. C: It is a flowering plant. D: Its ovary contains more than one ovule. Based on the diagram only, what conclusion(s) can you draw about the plant above?

The table below shows the physical characteristics of Sharon and her parents, Mr and Mrs Tan. How many characteristics did Sharon inherit from her parents?

Cathy examined three cell specimens under a microscope. She recorded her observations in the table below. Which cell is most likely to represent an onion cell?

Which part of the cell below controls the movement of materials in and out of the cell?

Peter observed a seed as it germinated into a young plant. He recorded his observations as shown below. At which stage(s) do/does the germinating seed take in oxygen?

The diagram below shows a plant that is pollinated by insects. If the insects pollinating the plants above are completely destroyed, which stage will be affected first?

The following table shows some characteristics of two plants, A and B. Plant A: Dispersed by water? No; Bears flowers? No. Plant B: Dispersed by water? Yes; Bears flowers? Yes. The following show the life cycles of four plants P, Q, R and S. Which life cycles (P, Q, R and S) do Plants A and B belong to respectively?

The graphs below show how the changes from night to day affect the rate of photosynthesis and respiration of a green plant. Which one of the graphs correctly shows the change in the rate of the activities?

The food web below shows the food relationship among various organisms in a particular community. Farah made the following observations about the above organisms A, B, C, D, E, F and G. Based on the above information, which of the following statements is correct?

Tom studied the habitats of some organisms and discovered that different organisms grow well under different conditions. He grouped the organisms according to two environmental factors A and B. Based on his data collected above, what are Factors A and B?

A group of pupils observed the tree below and made the following statements. Susan: There are 8 populations. Ravi: There is only one community. Tom: All the living things on the tree are consumers. Alan: All the living and non-living things make up the community. Who has made a correct statement?

The diagram shows how the circulatory, digestive and respiratory systems in our body work together. X, Y and Z represent the gases that are transported by these systems. Which one of the following correctly shows the amount of gases represented by X, Y and Z?

The diagrams below show parts of the human and fish system. Part of the human system (P) and Part of the fish system (Q). Which of the following is a function of both P and Q?

Ross set up the experiment below to find out how quickly water can pass through two different types of soil. The time taken for the water to pass through each type of soil was measured and recorded in the table below (Soil A: 15 seconds; Soil B: 40 seconds). Which one of the following correctly represents the properties of Soil A and Soil B?

Brandon wanted to test the hardness of 4 different materials, A, B, C and D. He used the materials to scratch each other and recorded the results in his journal as shown below. • B cannot be scratched by A. • C can be scratched by A but not D. Based on his results above, which one of the following shows the 4 materials arranged in increasing order of hardness?

John magnetised a steel rod XY using a magnet as shown in Diagram 1. The steel rod was then used to attract an iron nail as shown in Diagram 2. What are the magnetic poles of the parts marked X and Z?

A plastic toy car with a steel bar was placed on a plastic track as shown below. The toy car was then given a push towards Magnet B. Which of the following observation about the above experiment is correct?

Four wet bath towels were left to dry in four different places from 11am to 2pm. The masses of the towels were measured at the beginning and at different intervals during the day. The table below shows the results. Which towels were completely dry by 1pm?

Alim wanted to find out which material is a better conductor of heat. He used two cups, A and B, which were made of different materials. He filled the same amount of water at 80°C into the cups and measured the temperature of the water every minute. His set-up was left under the fan in the Science room. Why did Alim's teacher say that his experiment was not a fair one?

Study the set-up shown below. Dan wanted to find out if the ink drop will move in the tube in the above set-up when the set-up is placed in basins containing water of different temperatures. Which of the following arrangements is most likely to make the ink-drop fall into Flask Q?

The graph below shows how the length of Anna's shadow changes over a period of time when she walks in a straight line near a street lamp at night. Based on the graph, which one of the following statements is correct?

Ben and Lily stand in front of a mirror in a room as shown below. Which one of the following statements best explains how Ben is still able to see Lily clearly even though she is standing behind him?

Study the circuit below. Bulbs A, B and the two batteries are identical. When the switch touches point Y on the circuit as shown in diagram 1, bulb A is unlit while bulb B is lit with a brightness of 2 units. If the switch is moved to touch point X as shown in diagram 2, what would happen to bulbs A and B?

Four materials, A, B, C and D of similar size and mass were connected in the electrical circuit as shown below. Which one of the following correctly represents the materials, A, B, C and D, in the electrical circuit so that only two of the bulbs will light up?

A cannonball is fired from a cannon and moves through the path as shown in the diagram below. Which one of the following graphs correctly shows the changes in the amount of gravitational potential energy and kinetic energy of the cannonball from point A where it leaves the cannon to point B just before it reaches the ground?

Nicky carried out an experiment to find out the relationship between the number of times the key to a toy car was turned and the distance it travelled over a surface. He recorded his results in a table as shown below. Which of the following statements that Nicky made are true about the experiment? A: The kinetic energy that the toy car possessed was constant. B: The toy car possessed the greatest potential energy when it was moving along the surface. C: The potential energy of the toy car was greater when the number of times the key was turned increased. D: Potential energy was converted to kinetic, heat and sound energy when the toy car was released.

A rubber seed was continuously rubbed on a rough floor for a few minutes. Which one of the following best describes the energy conversion in the rubber seed?

The diagram below shows an object that is hung on a spring balance. What is the force that the spring in the balance exerted on the object?

Two pieces of identical papers, one crumpled into a ball, are released from the same height at the same time as shown in the diagram below. The crumpled ball of paper reaches the ground first because ____.