Sri Lanka G.C.E. Ordinary Level (O/L) Science
This course provides a comprehensive introduction to the natural sciences by integrating the disciplines of Biology, Chemistry, and Physics into a cohesive study of the world around us. You will begin by exploring the diversity of life through the study of biological systems including cell biology, human physiology, and the principles of genetics. The curriculum extends to the material world where you will investigate the composition of matter, chemical changes, and the industrial applications of chemistry. You will also examine the physical laws that govern motion and energy by analyzing forces, electricity, magnetism, and the behaviour of light and sound. Crucially, you will develop the skills of scientific inquiry by observing phenomena and conducting practical investigations. By connecting these scientific concepts to real life situations, you will be equipped to appreciate the impact of science on technology and the environment.
Subject Content: Integrated Scientific Disciplines
The syllabus provides a broad foundation across biology, chemistry, and physics, along with earth and environmental sciences (Grade 6 to 11).
Biology
Covers **Plant and Animal Diversity**, biological processes, **nutrients in food**, and concepts related to **a healthy life**.
Chemistry
Includes **Atomic Structure**, **Acids and Bases**, **functions of water**, and the properties of various **materials**.
Physics
Focuses on **Static Electricity**, **generation of electricity**, **forms of energy and uses**, **Light, Sound, Heat**, and **Force and Motion**.
Earth and Environmental Science
Covers the **nature of the Earth**, **minerals and rocks**, **soil**, the **atmosphere**, **environmental resources**, and **pollution**.
Skill Development Focus
The course aims to develop scientific literacy, critical thinking, and practical skills for real-world application.
Scientific Inquiry and Practical Skills
Using **scientific methods to solve problems** and developing proficiency in the **proper use of laboratory instruments** (e.g., the microscope).
Critical Thinking and Problem-Solving
Logically and critically evaluating scientific information and applying knowledge to address **real-world challenges like pollution**.
Collaboration
Developing the ability to work effectively with others to solve scientific problems.
Assessment Structure (Total 200 Marks Before Scaling)
The assessment consists of two compulsory written papers, reported out of a final mark of 100 after scaling.
- **Duration:** 1 hour
- **Marks:** 80 marks (40% of total assessment)
- **Format:** 40 compulsory Multiple Choice Questions (2 marks each) covering all syllabus components.
- **Duration:** 2 hours and 15 minutes (with 10 min reading time)
- **Marks:** 120 marks (60% of total assessment)
- **Format:** **Part A** (4 compulsory structured questions) and **Part B** (answer 3 from 5 essay-type questions).
- **Content Focus:** Tests knowledge, application, analysis, and evaluation across all syllabus topics.