P3 Science CA2 2025 — Catholic High

Q: A container truck is used to transport heavy objects. What are the properties of the material used to make part A of the container?

B. flexible (no), strong (yes). Part A of a container truck, which transports heavy objects, must be strong to withstand the weight and forces. It does not need to be flexible. Therefore, the material for part A should be strong but not necessarily flexible. Option B states it is not flexible and strong, which aligns with the requirements.

Q: Which is not a function of the skeletal system?

A. to take in oxygen. The skeletal system provides support for the body, protects vital organs like the brain and lungs, and allows movement. Taking in oxygen is a function of the respiratory system, not the skeletal system.

Q: What material is part F of the umbrella most likely made of?

D. plastic. Part F represents the ribs of an umbrella. Modern umbrella ribs are often made of plastic or fiberglass to provide flexibility, make them lightweight, and resist rust and breaking, especially in windy conditions. While metal is also a common material, plastic (or fiberglass, a composite plastic) is a very plausible option, perhaps considered 'most likely' for its balance of properties.

Q: The objects are grouped according to the type of materials they are made of. Which of the following correctly shows A, B and C?

B. A: fabric, B: glass, C: ceramic. Objects in group A are 't-shirt' and 'school bag', which are typically made of fabric. Objects in group B are 'mirror' and 'window pane', typically made of glass. Objects in group C are 'mug' and 'vase', typically made of ceramic. Option B correctly matches these material types.

Q: Study the four organ systems. Which organ systems help Brandon to breathe faster and his heart to beat faster during a swim?

D. C and D. When swimming, the body requires more oxygen, so the respiratory system (C) works harder to take in more oxygen (breathing faster). The heart also beats faster to pump oxygenated blood more quickly to the muscles through the circulatory system (D). Therefore, systems C and D are involved.

Q: Study the diagram. Which organs are not grouped correctly?

C. gullet, nose, large intestine. Based on correct organ system classification: - Gullet (esophagus) belongs to the digestive system, but is shown under circulatory system. - Nose belongs to the respiratory system, but is shown under digestive system. - Heart correctly belongs to the circulatory system. - Stomach correctly belongs to the digestive system. - Lungs correctly belong to the respiratory system. - Large intestine belongs to the digestive system, but is shown under respiratory system. The organs incorrectly grouped in the diagram are gullet, nose, and large intestine, which matches option C.

P3 Science 2025 CA2 9 questions 12 marks

Source: Catholic High, 2025

This P3 Science CA2 paper from Catholic High (2025) contains 9 questions worth 12 marks. Use it as a study reference for Science topics typically tested at P3 level in Singapore schools.

Q1 MCQ 2 marks 🖼 Visual

A container truck is used to transport heavy objects. What are the properties of the material used to make part A of the container?

Q2 MCQ 2 marks

Which is not a function of the skeletal system?

Q3 MCQ 2 marks 🖼 Visual

What material is part F of the umbrella most likely made of?

Q4 MCQ 2 marks 🖼 Visual

The objects are grouped according to the type of materials they are made of. Which of the following correctly shows A, B and C?

Q5 MCQ 2 marks 🖼 Visual

Study the four organ systems. Which organ systems help Brandon to breathe faster and his heart to beat faster during a swim?

Q6 MCQ 2 marks 🖼 Visual

Study the diagram. Which organs are not grouped correctly?

Q7 Structured 🖼 Visual

The diagram shows the human digestive system. (a) Put a tick (✔) in the box(es) where digestive juices are added. The first one has been done for you. (b) Draw a line to match each organ to its function.

Q8 Structured 🖼 Visual

The diagram shows the properties of materials W, X, Y and Z. The diagram shows an outdoor tent. (a) State one similarity between materials Y and Z. (b) State the properties of material W. (c) Write "T" for true and "F" for false in the boxes.

Q9 Structured 🖼 Visual

Paul placed a board made of material A over two pillars. Next, he stacked similar books, one at a time, on the board until it broke. He repeated the experiment using boards made of materials B and C. His results are shown in the table. (a) Which property of the materials was Paul trying to find out? Put a tick (✔) in the correct box. (b) Which material A, B or C is most suitable to make part X of a swing? Explain why.

P3 Science CA2 2025 — Catholic High

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