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Primary 6 PSLE Science Light Quiz

Free P6 PSLE Science Light quiz, HY3 Exam version, with questions, answers, and PSLE-focused practice for Singapore students.

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Primary 6 PSLE Science From Real Exams Generated by Tencent HY3 Free Updated 2026-07-10

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Questions

Primary 6 PSLE Science Quiz - Light

Name: ___________________________
Class: ___________________________
Date: ___________________________
Score: ___________ / 40

Duration: 50 minutes
Total Marks: 40

Instructions:

This quiz has 20 questions on the topic of Light.
Section A: 10 multiple-choice questions (1 mark each).
Section B: 6 short-answer questions (2 marks each).
Section C: 4 structured questions with subparts (total 8 marks).
Write your answers clearly in the spaces provided.

Section A (Questions 1–10, 1 mark each)

Which of the following is a source of light?
A) The Moon
B) A mirror
C) A glowing bulb
D) A white wall

Answer: ______
Light travels in a __________________ path.
A) curved
B) straight
C) zigzag
D) circular

Answer: ______
When light hits a smooth mirror, it is __________________.
A) absorbed
B) refracted
C) reflected
D) transmitted

Answer: ______
Which material lets most light pass through so we can see clearly?
A) Wooden door
B) Clear glass
C) Thick cardboard
D) Aluminum foil

Answer: ______
A shadow is formed when light is __________________ by an opaque object.
A) reflected
B) blocked
C) bent
D) coloured

Answer: ______
Which of these is an example of a translucent object?
A) A brick wall
B) A tracing paper
C) A steel spoon
D) A car headlight

Answer: ______
We see a red apple as red because the apple __________________.
A) absorbs all colours and reflects red
B) reflects all colours
C) absorbs red and reflects other colours
D) makes its own red light

Answer: ______
Which statement about reflection is correct?
A) Light bends when it reflects
B) Angle of incidence equals angle of reflection
C) Reflection only happens in water
D) A rough surface gives a clear image

Answer: ______
A periscope uses mirrors to help us see over walls because light can be __________________.
A) bent around corners
B) reflected at angles
C) absorbed fully
D) made brighter

Answer: ______
Which object forms the darkest shadow in sunlight?
A) A clear plastic bottle
B) A thin sheet of paper
C) A solid wooden block
D) A glass window

Answer: ______

Section B (Questions 11–16, 2 marks each)

Explain why a person cannot see an object in a completely dark room even if the object is in front of them.

State one difference between a transparent material and a translucent material.

Draw a simple ray diagram to show a light ray from a torch hitting a plane mirror and reflecting away. Label the incident ray and reflected ray.

Why does a shadow become larger when an object is moved closer to the light source?

A student places a book between a lamp and a screen. Describe what is seen on the screen and why.

Explain how a mirror helps you see the back of your head when two mirrors are placed at an angle.

Section C (Questions 17–20, subparts total 8 marks)

(a) What is reflection of light? [1 mark]

(b) Give one everyday example of reflection. [1 mark]
(a) Name one source of light and one non-source of light. [1 mark]
Source: __________________ Non-source: __________________
(b) Explain the difference between them. [1 mark]
Study the setup below.

Experimental Setup for Q19 (P6 Science)

Generated experimental_setup for Q19.

(a) What is formed on the screen? [1 mark]

(b) Why is the area behind the triangle dark? [1 mark]

(a) State whether a frosted window is transparent, translucent, or opaque. [1 mark]
(b) Explain your answer using what happens to light. [1 mark]
(c) Give one reason why translucent materials are useful at home. [1 mark]
(d) Name one object that is opaque. [1 mark]

Answers

Primary 6 PSLE Science Quiz - Light (Answer Key)

Total Marks: 40
Topic: Light

Section A Answers (1 mark each)

C) A glowing bulb
Teaching note: A source of light makes its own light. The Moon, mirror, and wall only reflect light from other sources.
B) straight
Teaching note: Light travels in straight lines. This is why shadows have sharp edges and beams look straight.
C) reflected
Teaching note: A smooth mirror sends light back; this is reflection.
B) Clear glass
Teaching note: Transparent materials let light pass through with little scattering so we see clearly.
B) blocked
Teaching note: Opaque objects stop light, forming a shadow behind them.
B) A tracing paper
Teaching note: Translucent objects let some light through but scatter it, so images are blurry.
A) absorbs all colours and reflects red
Teaching note: Coloured objects reflect their own colour and absorb others. Red apple reflects red light to our eyes.
B) Angle of incidence equals angle of reflection
Teaching note: Law of reflection: the incoming angle equals the outgoing angle.
B) reflected at angles
Teaching note: Periscope mirrors reflect light at 45°, letting us see over obstacles.
C) A solid wooden block
Teaching note: Opaque and thick objects block the most light, giving darkest shadows.

Section B Answers (2 marks each)

Answer: In a completely dark room, there is no light source. (1 mark) Light is needed to enter our eyes after reflecting from objects, so without light we cannot see the object. (1 mark)
Common mistake: Saying "eyes do not work" instead of explaining lack of light.
Answer: Transparent materials let most light through and we see clearly (e.g. clear glass). (1 mark) Translucent materials let some light through but scatter it, so we see blurry images (e.g. tracing paper). (1 mark)
Answer: Draw a straight line from torch to mirror (incident ray), and a straight line leaving mirror at same angle (reflected ray). Label both. (2 marks: drawing 1, labels 1)
Teaching note: Show angle of incidence = angle of reflection.
Answer: When the object moves closer to the light, the light rays spread out more after passing the object's edges. (1 mark) This makes a bigger shadow on the screen. (1 mark)
Answer: A shadow of the book appears on the screen. (1 mark) The book is opaque and blocks light from the lamp, so light cannot reach that part of the screen. (1 mark)
Answer: Two mirrors at an angle reflect light from the back of the head to the first mirror, then to the second mirror, then to the eyes. (1 mark) This uses reflection to let us see around corners. (1 mark)

Section C Answers (8 marks total)

(a) Reflection is when light bounces off a surface. [1]
(b) Example: seeing yourself in a mirror / mirror in a pond. [1]
(a) Source: Sun or bulb; Non-source: Moon or table. [1]
(b) Source makes its own light; non-source only reflects light from a source. [1]
(a) A shadow (triangular shape) is formed on the screen. [1]
(b) The triangle blocks the light rays, so no light reaches behind it on the screen. [1]
Visual check: Image must show straight rays blocked, dark triangle on screen.
(a) Translucent. [1]
(b) It lets some light through but scatters it, so we cannot see clearly through it. [1]
(c) It gives privacy while letting daylight in (e.g. bathroom window). [1]
(d) Any opaque object: wood, metal, book. [1]

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