Primary 3 Science exam paper analysis: 2025
PaperLah has 37 Primary 3 Science exam papers from 2025, set by 14 Singapore primary schools, with 1,019 questions worth 1,390 marks. The topics carrying the most marks were Classification (22%), Materials (21%) and Magnets (16%); together the top 3 topics account for half of all marks. Classification appears in 92% of the papers. Multiple-choice questions make up 54% of marks, and 0.4% of questions are worth 3 marks or more, which usually means showing working. A typical paper has about 28 questions and 38 marks.
These figures describe the school papers in PaperLah's collection, not official MOE or SEAB weightings. They help with planning revision; they can't predict a particular exam.
Compared with all years: Classification took 22% of marks in 2025 (all years: 27%); Materials took 21% of marks in 2025 (all years: 17%); Magnets took 16% of marks in 2025 (all years: 11%).
Where the marks are
Topics ranked by their share of all marks. The blue ones above the line together make up half.
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| Topic | % of marks | Papers |
|---|---|---|
| Classification | 21.7 | in 34 of 37 papers |
| Materials | 21.4 | in 26 of 37 papers |
| Magnets | 16.3 | in 17 of 37 papers |
| Life cycles | 15.4 | in 22 of 37 papers |
| Living and non-living things | 8.7 | in 27 of 37 papers |
| Fungi and bacteria | 4.8 | in 21 of 37 papers |
| Scientific investigation | 3.3 | in 20 of 37 papers |
| Plant reproduction | 2 | in 11 of 37 papers |
| Electricity | 1.8 | in 11 of 37 papers |
| Plant parts and transport | 1.7 | in 11 of 37 papers |
| Reproduction in humans and animals | 0.7 | in 8 of 37 papers |
| Light | 0.6 | in 7 of 37 papers |
| Adaptations | 0.6 | in 5 of 37 papers |
| Forces | 0.2 | in 2 of 37 papers |
| Heat | 0.1 | in 1 of 37 papers |
| Cycles | 0.1 | in 1 of 37 papers |
| Matter | 0.1 | in 1 of 37 papers |
| Human body systems | 0.1 | in 1 of 37 papers |
| Environment and ecosystems | 0.1 | in 2 of 37 papers |
| Scientific instruments | 0.1 | in 1 of 37 papers |
What a paper is made of
How children answer, as a share of marks.
- Multiple choice 54%
- Open-ended (show working) 23%
- Short answer 14%
- Fill in the blank 4%
- Other 5%
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| Format | % of marks |
|---|---|
| Multiple choice | 54.3 |
| Open-ended (show working) | 23.2 |
| Short answer | 13.7 |
| Fill in the blank | 4 |
| Drawing or labelling | 1.7 |
| Word bank | 1.4 |
| Other | 0.9 |
| Number answer | 0.6 |
| Cloze passage | 0.1 |
| Rewrite / synthesis | 0.1 |
Marks per question
Share of questions worth 1, 2, 3, 4 or 5+ marks. 6% have no marks printed. Higher-mark questions usually need working.
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| Marks | % of questions |
|---|---|
| 1 | 50.2 |
| 2 | 43.5 |
| 3 | 0.3 |
| 4 | 0.1 |
How likely a topic comes up
The share of papers with at least one question on the topic.
Show as table
| Topic | % of papers |
|---|---|
| Classification | 91.9 |
| Living and non-living things | 73 |
| Materials | 70.3 |
| Life cycles | 59.5 |
| Fungi and bacteria | 56.8 |
| Scientific investigation | 54.1 |
| Magnets | 45.9 |
| Plant reproduction | 29.7 |
| Electricity | 29.7 |
| Plant parts and transport | 29.7 |
| Reproduction in humans and animals | 21.6 |
| Light | 18.9 |
| Adaptations | 13.5 |
| Forces | 5.4 |
| Environment and ecosystems | 5.4 |
| Heat | 2.7 |
| Cycles | 2.7 |
| Matter | 2.7 |
| Scientific instruments | 2.7 |
| Human body systems | 2.7 |
Exam types
Which school exams these papers come from.
Key facts
- 37 papers, 1,019 questions, 1,390 marks, from 14 schools.
- 3 topics carry half of all marks.
- Most-tested topic: Classification, 22% of marks.
- Most common topic across papers: Classification, in 92% of papers.
- 0.4% of questions are worth 3 marks or more.
- Exam types: Weighted Assessment / CA and End-of-Year / SA2.
Questions parents ask
What topics come up most in Primary 3 Science exam papers in 2025?
By share of marks, the most-tested topics were Classification (22%), Materials (21%), Magnets (16%), Life cycles (15%) and Living and non-living things (8.7%).
How many questions and marks are in a Primary 3 Science paper?
A typical paper in this set has about 28 questions and 38 marks. Papers vary by school and by exam (weighted assessments are shorter than mid-year and end-of-year exams).
Which exams and schools are included?
37 papers from 14 schools, from these exam types: Weighted Assessment / CA and End-of-Year / SA2. The schools are listed further down this page.
Can I download these papers?
No. PaperLah doesn't share the papers as downloads. Children practise them online one question at a time, with instant marking, and parents see which topics need work.
Schools included
ACS (Junior) · ACS (Primary) · Ai Tong · Anglo-Chinese School · CHIJ · CHIJ St Nicholas Girls' · Catholic High · Henry Park · Maha Bodhi · Maris Stella High · Methodist Girls' · Nan Hua · Nanyang · Northland · Paya Lebar Methodist Girls' · Pei Chun · Pei Hwa · Raffles Girls' · Red Swastika · River Valley · Rosyth · Rulang · Singapore Chinese Girls' · St Hilda's · Tao Nan · Temasek · Yang Zheng
Schools with Primary 3 Science papers in the collection (all years). Papers are past school assessments; PaperLah is not affiliated with MOE, SEAB or the schools.
How this analysis is made
Every question in each paper is tagged with its topic, format and marks as printed. The figures above are counts over those questions: a topic's share of marks, the share of papers that include it, and so on. Topic names come from the papers and their answer keys, so similar topics can appear under slightly different names. Only aggregate figures are shown here; the questions themselves are practised inside PaperLah.
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