Q1
Structured
2 marks
🖼 Visual
In which of the following circuits, will the bulb light up? Tick [✓] the box(es) next to the circuit(s) which the bulb will light up.
P5 Science SA1 2025 — Anglo Chinese
Source: Anglo Chinese, 2025
This P5 Science SA1 paper from Anglo Chinese (2025) contains 10 questions worth 25 marks. Use it as a study reference for Science topics typically tested at P5 level in Singapore schools.
Q2
Open-ended
1 mark
🖼 Visual
Zayne sets up three electric circuits using identical batteries and bulbs in working condition. Arrange the bulbs, A, B and C from the dimmest to the brightest.
Q3
Structured
3 marks
🖼 Visual
Elle connected different types of materials, J, K, L and M, in circuits X, Y and Z. Only the bulb in circuit Y lit up. (a) Which materials, J, K, L and M are electrical insulators? Explain your answer. (b) Elle sets up another circuit using materials J, K, L and M as shown below. Which bulb(s), B1, B2 or B3, will light up in this circuit?
Q4
Structured
3 marks
🖼 Visual
Ray wants to find out how the arrangement of bulbs affect the brightness of bulbs in a circuit. He sets up the following circuits using bulbs and batteries in working condition. (a) Which circuits should Ray use to conduct a fair test? (b) State two other variables that Ray should keep the same to ensure a fair test. (c) Ray used circuits B and D for another investigation. State the aim of his investigation.
Q5
Structured
4 marks
🖼 Visual
Ali set up a circuit as shown. (a) Draw a circuit diagram that represents Ali's circuit. (b) Ali added two more batteries in series to his circuit and observed that neither of the bulbs lit up. Give a reason for his observation. (c) Draw a circuit diagram with wires, two batteries, two bulbs and a switch. Position the switch such that one bulb is lit all the time while the other bulb can be controlled by the switch.
Q6
Structured
3 marks
🖼 Visual
Mr Lee bought fairy lights B for his son's birthday party after comparing fairy lights A and B. (a) State two advantages of fairy lights B. Mr Lee wanted to investigate how the bulbs arranged in series affects the brightness of the bulbs in a circuit. He sets up the circuits as shown. He noticed that bulb A was brighter than bulb B. (b) What is the relationship between the number of bulbs arranged in series and their brightness in the circuit?
Q7
Structured
2 marks
🖼 Visual
Haris was given a circuit card with metal clips A, B, C, D, E and F as shown in figure 1. The metal clips were connected using wires at the back of the card. He set up a circuit tester as shown in figure 2 and connected points X and Y to the metal clips. He recorded his observations in a table. (a) Draw the least number of lines to show how the wires were connected at the back of the card. (b) What will Haris observe about the bulb if he connects points X and Y to clips B and F?
Q8
Structured
3 marks
🖼 Visual
Munirah made a model of an automatic door alarm system with a bell, two batteries and some wires and metal strips as shown. When the system is activated, the house owners will be alerted when there is a burglar who enters the house. (a) Explain how the system works when the door was opened. (b) Munirah's brother told her that the bell was too soft to be heard. Without changing the bell, suggest what Munirah can do to make the bell produce a louder sound.
Q9
Open-ended
2 marks
🖼 Visual
The picture shows electrical hazards when electricity is used in Ben's home. State two measures that Ben should take to use electricity safely.
Q10
Structured
2 marks
🖼 Visual
Read and follow the step-by-step instructions carefully. Steps: 1) Your teacher will give you a bag with a blue and silver object. 2) Use the objects and your electricity kit to answer parts (a) and (b). 3) Using the components in your electricity kit, test that your bulb and battery are in working condition. (a) Test which object(s), blue and/or silver, is/are electrical conductor(s) and tick (✓) the correct box(es). (b) Complete the circuit diagram in the box, to show how you tested the blue object.