📚 Science Explained

Singapore Primary
Science Articles

Clear, student-friendly explanations of every P3, P4 and PSLE Science topic — written by educators and aligned to the MOE 2026 syllabus.

All Science Articles
15 in-depth guides covering the full Singapore Primary Science syllabus.
P3/P4 Plants
How Plants Make Food: Photosynthesis Explained
Sunlight, water, CO2, glucose and oxygen. Includes what happens when each condition is removed.
Read article →
 P4/PSLE Ecosystems
Food Chains vs Food Webs: Complete P4 Guide
Producers, consumers, decomposers and how removing one species affects an entire ecosystem.
Read article →
 P4/PSLE Water
The Water Cycle Explained Simply
Evaporation, condensation, precipitation, transpiration — complete with all key vocabulary for exams.
Read article →
 PSLE Complete Guide
PSLE Science 2026: Complete Topic Checklist
Every examinable topic organised by theme. Use it as your revision checklist.
Read article →
 P4 Electricity
How Electricity Works: Circuits & Conductors
Series vs parallel circuits, conductors, insulators — with clear comparison tables.
Read article →
 P3 Diversity
Living vs Non-Living Things: P3 Guide
MRS GREN, the three categories, vertebrates and the exam traps that catch students out.
Read article →
 P4/PSLE Life Cycles
Animal Life Cycles: Butterflies, Frogs & Grasshoppers
Complete vs incomplete metamorphosis. Detailed life cycles with full comparison tables.
Read article →
 P3 Materials
Properties of Materials: Complete P3 Guide
Transparent, translucent, opaque. Conductors, insulators, solubility and density.
Read article →
 P3/P4 Heat
Heat and Temperature: P3 Science Complete Guide
Heat flow, conductors, insulators, expansion and contraction — with the water-freezing exception.
Read article →
 PSLE Exam Skills
How to Answer PSLE Science Open-Ended Questions
The Because-Therefore structure, science keywords, and the top 5 mark-losing mistakes.
Read article →
 PSLE Adaptations
Animal Adaptations: Desert, Ocean & Rainforest
Structural, behavioural and functional adaptations with model exam answers.
Read article →
 P4 Human Body
The Human Digestive System: Complete P4 Guide
Organ-by-organ journey of food, villi, the liver's role, and mechanical vs chemical digestion.
Read article →
 P3/P4 Magnets
Magnets and Magnetism: Complete P3 Notes
The 4 magnetic materials, pole rules, non-contact force, and why compasses point north.
Read article →
 PSLE Study Guide
How to Revise for PSLE Science
A 12-week revision plan, active revision strategies, and exam day tips for PSLE 2026.
Read article →
 P4 Topic Guide
P4 Science Topics: What to Study and Where to Focus
All 8 P4 topics explained — what each covers, what matters most, and links to PSLE.
Read article →
 P4/P5 Forces
Forces and Motion: Contact, Friction, Gravity & More
Contact vs non-contact forces, all four effects of forces, balanced and unbalanced forces — with model answers.
Read article →
 P4/PSLE Human Body
The Human Respiratory System: Breathing and Gaseous Exchange
All respiratory organs, inhalation vs exhalation, gaseous exchange at the alveoli — with full comparison tables.
Read article →
 P3/P4 Light
Light and Shadows: Transparent, Opaque, Reflection & Shadow Formation
How light travels, classifying materials, shadow size factors, and the Sun's daily movement — with model answers.
Read article →
 P3/P4 Matter
States of Matter: Solids, Liquids and Gases Explained
Properties of each state, all changes of state, evaporation vs boiling, and condensation in daily life.
Read article →
 P5/PSLE Plants
Plant Reproduction: Pollination, Fertilisation and Seed Dispersal
Flower parts, insect vs wind pollination, fertilisation, and all four methods of seed dispersal with examples.
Read article →
 P5/PSLE Ecosystems
Ecosystems and the Environment: Habitats, Food Webs and Human Impact
Producers, consumers, population change reasoning, deforestation, pollution, and conservation in Singapore.
Read article →

Ready to test your knowledge?

Use ScienceStar's free quizzes and flashcards to practise everything you have just read.

🌈 P3 Science 🔬 P4 Science 🔭 PSLE 2026