P6 Science CA1 2025 — Anglo Chinese

A solar panel is used to produce electricity for a lamp that is used at night. Which form of energy received by the solar panel is converted to electricity?

Study the flowchart. A and B are sources of energy. What can A and B be?

The diagram shows a man wearing a head torch, powered by batteries, around his head to help him see in the dark during outdoor activities. Which of the following correctly shows the energy changes in the head torch when it is turned on?

A ball is released from position P of the ramp as shown. Which graph shows the change in potential energy and kinetic energy of the ball from position P to Q?

Zalina wanted to find out how different wind speeds affect the amount of electricity generated. The table shows the results of four experiments that she conducted. Which two experiments support the hypothesis, "When wind speed increases, more electricity is generated?"

Which two are examples of the effects of forces? A The umbrella blocking the sunlight. B A boy bouncing a ball against a wall. C Mother sweeping the floor with a broom. D A metal spoon gaining heat when placed in a bowl of hot soup.

When three identical blocks were attached to a table top using three identical springs, the springs were compressed. Which of the following would be observed?

Ramps are often used when transporting goods on a trolley to a container truck. The surface of the ramp is often textured like the one shown in the image. Which statement explains the reason for the textured surface of the ramp?

A man is pulling a box using a rope as shown. Which arrows, A, B, C or D, correctly show the direction that gravitational force and frictional force are acting on box?

Jin went for an indoor skydiving activity. Air was continuously blown from the bottom of the flying chamber to keep him afloat at position X. Which of the following explains why Jin was able to stay afloat at position X?

Kate conducted an experiment with the set-up as shown. She pulled back the elastic band with disc A by different distances, distance X. She repeated the experiment for different distance X and measured and recorded how far disc A travelled, distance Y, in the table shown. [Table: X (cm), Y (cm) — 2, 4.5; 4, 8; 6, 12.5; 8, 16.] (a) How is distance Y affected by distance X? Explain your answer in terms of energy. [2] (b) Kate was unable to get results of distance Y beyond 12 cm of distance X. Suggest a reason why. [1]

Jim uses a falling cylinder to split wooden logs. The 5 kg cylinder is lifted to a height, and when released, it slides down the rod and strikes the blade, which then splits the log. (a) Where does Jim's energy come from? [1] (b) Jim lifts the cylinder and releases it. As it falls, not all its potential energy is converted to kinetic energy. Explain why. [1] (c) State two ways Jim can increase the kinetic energy of the cylinder just before it strikes the blade. [1]

A rocket carries fuel which burns inside a chamber. As the fuel burns, fire and hot gases are released from an opening at the back of the chamber as shown. A loud sound can be heard as the rocket travels upward. (a) State the source of energy for the rocket. [1] (b) Fill in the boxes to show the main energy conversion of the moving rocket. [2] [Diagram: ___ energy (fuel) → ___ energy (fire) + ___ energy (rocket) + ___ energy (rocket)] (c) Scientists currently use fuel-burning rockets to reach space, but are exploring space elevator technology by having a lift system running along a cable from Earth to a satellite that could transport objects into space. [Figure: A space elevator with a cable from Earth to a satellite anchor point.] Suggest one possible advantage of using a space elevator rather than a rocket to transport objects into space. [1]

Darius set up an experiment to investigate the relationship between the height from which the wooden ball is released and the height the eraser reaches. The heights are measured by Ruler A and Ruler B, respectively. When the wooden ball was released, it hit the balance scale at Point X, causing it to tilt and launch the eraser upwards. (a) Identify the main form of energy that the wooden ball had [1] (i) just before it was released: (ii) just before it hits Point X: Darius recorded the results in table. [Table: Height of release of wooden ball — 60, 70, 80, 90, 100; Height reached by eraser — 39, 48, 56, 65, 74.] (b) State the relationship between the height of release of the wooden ball and the height reached by the eraser. [1] (c) Darius wants to investigate how the mass of the wooden ball affects the height reached by the eraser. State two changes he should make to his experimental set-up to conduct this investigation. [2]

Mingzhe conducted an experiment where he applied liquid X on the table before pushing a wooden block in the direction indicated by the arrow as shown. He repeated the experiment using liquids Y and Z and recorded the average distances the block moved in the table shown. [Table: Liquid X — 30 cm; Y — 40 cm; Z — 20 cm.] (a) State the aim of Mingzhe's experiment. [1] (b) Mingzhe used the same block throughout the experiment. How does using the same block ensure a fair test? [1] (c) State one other variable that Mingzhe must keep the same to ensure a fair test. [1] (d) Which liquid, X, Y or Z is the best lubricant for oiling the hinges of a door? Explain your answer based on the results in the table. [1]

Elliott tied object X to the top of his plastic toy car and placed it on a track that only allowed the car to travel in a straight line. At the end of the track, he attached a strong magnet to the wall as shown. Elliott pushed the car with object X towards the end of the track and gently released it at distance P. The car moved backwards and travelled a distance Q before stopping. He repeated the process with decreasing distances P and measured the new distance Q each time. (a) Name the force that caused the car to move backwards. [1] (b) Explain why the car moved backwards with object X. [2] Elliott repeated the experiment using the same setup, but this time he increased distance P. He observed that at a certain distance P, the car with object X did not move at all. (c) Explain Elliott's observation. [1]

An experiment was set up as shown. A car was pushed forward on material X, and the distance travelled in ten seconds was measured. The experiment was then repeated using materials Y and Z. The size of each material, the force applied to push the car, and the starting point remained the same. The results are as shown in the table. [Table: Material X — 32 cm; Y — 40 cm; Z — 28 cm.] (a) State the forces acting on the car as it was moving on the materials. [1] (b) Which material is the safest to use for building the road just outside a school? Explain your answer. [2] (c) How will the results be affected if an equal volume of water was poured on each material before the car was pushed? [1]

Siti used the following setup to study three types of springs X, Y, and Z. She placed objects of different masses on the tray attached to each spring and measured the length of the spring. The results are shown in the graph. [Graph: length of spring (cm) vs mass of object (kg). At mass = 7 kg: Spring X ≈ 7 cm, Spring Y ≈ 6 cm, Spring Z ≈ 3 cm. Spring X compresses least, Spring Z compresses most.] (a) What is the length of spring Y when a 7 kg object was placed on it? [1] Siti attached one end of a spring to the bottom of the box, placed a toy on the spring, and closed the lid. When she opened the lid, the toy jumped as shown in the diagrams. [Figure: Box with spring and toy compressed inside; on opening the lid, the toy jumps up to a certain height.] (b) Which spring, X, Y, or Z, should Siti use to close the lid with the least force? Explain your answer. [1] (c) Siti used the same spring in part (b) but changed to a taller box. Would the same toy jump to a greater, lower, or the same height? Explain your answer in terms of force. [2]