AI Generated Quiz
Primary 3 Science Light Quiz
Free P3 Science Light quiz, Ox AI version, with questions, answers, and syllabus-aligned practice for Singapore students.
These static practice materials are generated from the site's syllabus and paper-generation workflow, with source and model context shown so students and parents can evaluate the material before use.
Questions
Free quiz and exam paper access
Enter your details to view this paper
Your access is remembered on this device.
Answers
Primary 3 Science Quiz - Light: Answer Key
Total Marks: 40
Answer 1.
(3) The Sun — it is found in nature and gives out its own light. (1 mark)
Answer 2.
(2) Firefly — it produces its own light. (1 mark)
Answer 3.
(3) Straight — light always travels in straight lines. (1 mark)
Answer 4.
(2) Clear glass — it is transparent and lets nearly all light pass through. (1 mark)
Answer 5.
(3) Opaque — opaque objects block all light, forming shadows. (1 mark)
Answer 6.
- (a) Candle: Man-made
- (b) Lightning: Natural
- (c) Street lamp: Man-made
- (d) Stars: Natural
(½ mark each, 2 marks)
Answer 7.
- (i) eyes
- (ii) luminous
(1 mark each, 2 marks)
Answer 8.
- (a) False — the Moon only reflects sunlight.
- (b) True — a shadow takes the outline shape of the object.
(1 mark each, 2 marks)
Answer 9.
- (a) Clear plastic sheet: A (Transparent)
- (b) Frosted glass: B (Translucent)
- (c) Cardboard: C (Opaque)
(½ mark each part within 2-mark allocation; accept any consistent matching)
Answer 10.
(2) It becomes bigger — the closer the object is to the light source, the larger the shadow. (2 marks)
Answer 11.
There is no light in a dark room. Without light entering our eyes, we cannot see anything. (2 marks)
Answer 12.
Any two: torch, candle, lamp, television screen, phone screen, traffic light. (1 mark each, 2 marks)
Answer 13.
In the morning the Sun is low in the sky, so shadows are long. At noon the Sun is high overhead, so shadows become shorter. (2 marks)
Answer 14.
Sunlight is very strong/bright. Looking directly at the Sun can damage our eyes and hurt our eyesight. (2 marks)
Answer 15.
An opaque material. Examples: cardboard, wood, metal, brick. (1 mark for term, 1 mark for example)
Answer 16.
Light from the torch travels in straight lines towards the book. The book is opaque, so it blocks the light. The light cannot pass through, so the area behind the book receives no light and a shadow forms there. (3 marks: light travels, opaque blocks, shadow forms)
Answer 17.
- (a) The shadow becomes smaller/lower as the toy moves further from the torch.
- (b) Pattern: the further the toy is from the torch, the smaller the shadow (shadow size decreases as distance increases).
(1½ marks each part, 3 marks)
Answer 18.
Ravi's sister is correct. The Moon is not a source of light because it does not give out its own light. We see the Moon because it reflects light from the Sun. (3 marks: who is correct, not own light, reflects sunlight)
Answer 19.
He should choose the black card. It is opaque, so it blocks all the light and gives the darkest, clearest shadow. Clear plastic is transparent and lets light through, so almost no shadow forms. Tracing paper is translucent and lets some light through, so the shadow is faint and unclear. (3 marks: choice, plus reason for each unsuitable sheet)
Answer 20.
Light from the lamp shines onto the book. The book reflects the light into Mei's eyes, so she is able to see the book. (3 marks: light shines on book, reflects, enters eyes)
— End of Answer Key —