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Combined Science 1-4

O-Level (Forms 1–4)

Browse all 20 syllabus topics, key exam takeaways, and practice quiz banks

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Syllabus Topics (20)

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Topic 1 Open Guide →

Acids, Bases and Salts

Properties, uses, and reactions of acids, bases and salts.

Topic 2 Open Guide →

Air and Combustion

Composition of air and combustion reactions.

Topic 3 Open Guide →

Cell Structure and Organization

Exploration of animal and plant cell structures and their functions.

Topic 4 Open Guide →

Chemical Reactions and Equations

Types of chemical reactions and balancing equations.

Topic 5 Open Guide →

Classification of Living Organisms

Study of biological classification and characteristics of major kingdoms.

Topic 6 Open Guide →

Ecology and Ecosystems

Relationships between organisms and their environment, food chains and webs.

Topic 7 Open Guide →

Electricity and Magnetism

Basic concepts of electric current, circuits, and magnets.

Topic 8 Open Guide →

Energy and Its Transformation

Forms of energy and conversions between them including heat and motion.

Topic 9 Open Guide →

Excretion and Homeostasis

Removal of metabolic wastes and maintenance of internal balance.

Topic 10 Open Guide →

Forces and Motion

Effects of forces on motion and calculating speed and acceleration.

Topic 11 Open Guide →

Growth and Development

Processes and stages of growth in living organisms.

Topic 12 Open Guide →

Human Impact on the Environment

Pollution, conservation, and sustainable use of resources.

Topic 13 Open Guide →

Laboratory Safety and Scientific Methods

Introduction to safe laboratory practices and basic scientific procedures and investigations.

Topic 14 Open Guide →

Light and Sound

Properties and behavior of light and sound waves.

Topic 15 Open Guide →

Matter and Atomic Structure

Properties and classification of matter, atomic structure and elements.

Topic 16 Open Guide →

Reproduction

Types of reproduction in plants and animals, including fertilization and reproductive systems.

Topic 17 Open Guide →

Respiration

Aerobic and anaerobic respiration and energy release in living organisms.

Topic 18 Open Guide →

The Periodic Table

Organization and trends in the periodic table of elements.

Topic 19 Open Guide →

Transport in Living Organisms

Mechanisms of transport in plants and animals including diffusion, osmosis, and circulatory systems.

Topic 20 Open Guide →

Water and Solutions

Properties of water, solubility, and preparation of solutions.