P3 Science SA1 2025 — St Hildas

P3 Science 2025 SA1 13 questions 30 marks

Source: St Hildas, 2025

This P3 Science SA1 paper from St Hildas (2025) contains 13 questions worth 30 marks. Use it as a study reference for Science topics typically tested at P3 level in Singapore schools.

Q1 MCQ 2 marks 🖼 Visual
Study the classification table below. Which one of the following best represents X?
Q2 MCQ 2 marks 🖼 Visual
The diagram below shows a plant before and after three months. Based on the diagram, which characteristic shows that the plant is a living thing?
Q3 MCQ 2 marks 🖼 Visual
The diagram below shows two animals. Which of the following best explains why the two animals are classified in the same group?
Q4 MCQ 2 marks 🖼 Visual
Which of the following is different in the way it reproduces?
Q5 MCQ 2 marks
What is the similarity between bacteria and fungi?
Q6 MCQ 2 marks 🖼 Visual
Eric carried out an experiment by placing a similar snail into each container, X and Y. After two weeks, he observed that the snail in container X died. Based on the experiment, what can Eric conclude?
Q7 MCQ 2 marks 🖼 Visual
Study the flowchart below carefully. Which letter P, Q, R or S represents a snake?
Q8 MCQ 2 marks 🖼 Visual
Ali had three similar buns. He toasted bun X. Then, he added a few drops of water on bun Y. He did not do anything to bun Z. He sealed the buns in separate bags and left them under his table for a week. Which of the following shows a possible observation of the amount of mould growing on each bun after a week?
Q9 MCQ 2 marks 🖼 Visual
Four living things, A, B, C and D, are grouped according to the chart below. Based on the chart above, which of the following statements is incorrect?
Q10 MCQ 2 marks 🖼 Visual
The table below provides information about four different living things, W, X, Y and Z. Which one of the living things, W, X, Y or Z best represents the organism shown below?
Q11 MCQ 2 marks 🖼 Visual
Study animal Q below. Which of the following characteristics show that animal Q is not an insect? A the number of legs B the number of wings C the number of body parts
Q12 Structured 4 marks 🖼 Visual
Leela observed three animals X, Y and Z. She recorded their characteristics in the table as shown. A tick (✓) indicates that the animal has that characteristic. (a) Based on the characteristics shown in the table above, state one difference and one similarity between animals X and Z. (i) Difference: [1] (ii) Similarity: [1] (b) Based on the characteristics shown in the table above, circle the group that animal Y belongs to. Give a reason for your answer. (i) Animal group: ( Birds / Mammals / Fish / Reptiles / Amphibians ) [1] (ii) Reason: [1]
Q13 Structured 4 marks 🖼 Visual
Four students talked about what they had learnt in science. Student A: The tortoise is an amphibian which has moist skin. Student B: Some bacteria are harmful while others are useful to us. Student C: Most reptiles reproduce by laying eggs. Student D: Bread mould breaks down the bread into simpler substances and absorb them as food. (a) Which student, A, B, C or D, is wrong? Tick (✓) your answer in the box above. [1] (b) Correct and rewrite the statement identified in (a). [1] Nora conducted an experiment by placing two similar oranges in boxes of the same type. She placed both boxes G and H at a warm place as shown below. Four days later, Nora observed fungi growing on one of the oranges. (c) State the aim of her experiment. [1] To find out if ____ (d) To conduct a fair experiment, tick (✓) the correct box(es) for the variables that must be changed, measured or kept constant. [1] Variables: Presence of fungi; Presence of water; Size of orange; Temperature of surrounding.