International Junior Science Olympiad

International Junior Science Olympiad

The International Junior Science Olympiad (or just IJSO) is an international science competition for students not older than 15 years old. It was first held in 2004 and is held every year since then. Each country may send a team of up to 6 students and 3 team leaders. It is one of the international science olympiads.


The examinations consist of three separated tests, done in different days. The tests require knowledge about science (physics, chemistry and biology). The maximum score is 100 points.

Test examination

The test examination is composed of 30 multiple choice questions, 10 involving physics, 10 involving chemistry and 10 involving biology. Each of the questions has 4 alternatives. The competitor earns 1 point for each right answer, earns nothing for questions left unanswered and loses 0.25 for wrong answers. The maximum score for this test is 30 points.

Theoretical examination

The theoretical examination is made up of three parts, one for each of the subjects. The maximum score for this test is 30.

Experimental examination

The experimental examination is done in groups of up to three people of the same country, each country may have up to 2 teams. All students of the group receive the same grade. The maximum score for this test is 40 points. (From 1st to 3rd years there was only one question, 4th experimental competition had 4 questions.)

Host countries

* 2004 - Indonesia
* 2005 - Indonesia
* 2006 - Brazil
* 2007 - Taiwan
* 2008 - South Korea
* 2009 - Azerbaijan
* 2010 - Nigeria

External links

* [ IJSO Official]
* [ Website of 2007 IJSO]

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