The Sri Lankan Junior Science Olympiad Competition – 2023

The SLJSO is open for science students who are sixteen years or younger on 31st December of the competition year. The competition shall be conducted in Sinhala/English/Tamil media on a date decided by IPSL.

The examination paper shall consist of 50, Multiple Choice Questions based on physics, chemistry, biology, and Mathematics taught at 6 – 11 level syllabuses in Sri Lanka. Based on performance at SLJSO, Gold, Silver, Bronze Medals with a certificate will be awarded to the contestants. The best-selected contestants may represent the International Junior Science Olympiad with guidance and support from the Institute of Physics.

Examination Date:

2023-05-13 Saturday

Application Deadline:

2023-05-03 Wednesday

Registration Guides (ලියාපදිංචි වීමට තොරතුරු/ பதிவுகளை மேற்கொள்வதற்கான தகவல்கள்)

Visit the registration portal

Make sure to read the Registration Guides above before the registration

Visit our paper bank

To view the model papers and past papers with the answers

Sponsors of the SLJSO Competition – 2023

We are very much grateful to our sponsors for their contribution towards the success of the event

Institute of Physics Sri Lanka


The Institute of Physics, Sri Lanka (IPSL) is a professional body that was established in the year 1980 incorporated by act of Parliament No. 12 of 1986. IPSL is the apex body of physicists in Sri Lanka who work for the development of Physics and its applications to upgrade the quality of people. The main objective of the IPSL is to promote and advance the science of physics and its applications in Sri Lanka through the implementation of diverse activities and projects.

Sri Lankan Junior Science Olympiad


The objective of SLJSO is to promote interest in science among school students, exposing them to problem-solving, critical thinking, and experimentation, and to select the best students to represent the International Junior Science Olympiad (IJSO) annually. The Institute of Physics Sri Lanka has made arrangements to hold the national competition (SLJSO) annually.

International Junior Science Olympiad


The International Junior Science Olympiad (IJSO) is an annual individual and team competition in the Natural Sciences for students who are under sixteen years old on 31st December of the competition year. IJSO has been established in recognition of the significance of the Natural Sciences in the general education of young people and in all aspects of their lives. It is a purely educational event.



Prof. H.H. Sumathiapala

Leader, Country Coordinator – IJSO
National Coordinator – SLJSO
Department of Physics and Electronics
University of Kelaniya


Prof. W.U. Chandrasekara

Leader – IJSO
Assistant Coordinator – SLJSO
Department of Zoology and Environmental Management
University of Kelaniya


Prof. Kapila Senaviratne

Leader – IJSO
Assistant Coordinator- SLJSO
Department of Chemistry
University of Kelaniya

SLJSO Exams and Results

SLJSO 2022

View the exam papers, answers and results

SLJSO 2021

View the exam papers, answers, and results

SLJSO 2020

View the exam papers, answers and results

SLJSO 2019

View the exam papers, answers and results

SLJSO 2018

View the exam papers, answers and results

SLJSO 2017

View the exam papers, answers and results

SLJSO 2016

View the exam papers, answers and results

Our Participation at IJSO

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