Class 3 Science Olympiad: previous year questions and free practice

Practice based on previous year papers (2024-25 and 2025-26) and the syllabus, every answer explained.

Class 3 Science Olympiad exam pattern

Section	Questions	Marks each
Logical Reasoning	5	1
Science	25	1
Achievers Section	5	2
Total	35	40 marks · 60 minutes

Class 3 Science olympiads in 2026-27

International Science Olympiad (formerly NSO) · SOF · ₹170
National Level Science Talent Search Examination · Unified Council · ₹350 online
CREST Science Olympiad · CREST · ₹275
International Olympiad of Science · SilverZone · fee shown when you register
Humming Bird Science Olympiad · Humming Bird · ₹150 to ₹200
International Science Olympiad (ITO) · Indian Talent · ₹175 school · ₹500 online
International Foundation Science Olympiad · IOF · ₹150

Class 3 Science topics in each olympiad

	SOF	UC	CREST	SZ	ITO	IOF
Plants	●	●	●	●	●	●
Animals	●	●	●	●	●	●
Human Body	●	●	●	●	●	●
Earth, Sky and Space	●	●	●	●	●	●
Matter and Materials	●	●	●	●	●	●
Health, Hygiene and Safety	●	●		●	●	●
Transport and Communication	●		●	●	●	●
Only in some exams
Food and Nutrition	●	●	●		●
Environment and Resources	●		●	●		●
Reasoning	●			●	●	●
Living and Non-living Things				●	●	●
Clothes and Shelter	●		●		●
Air, Water and Weather				●	●	●
Light	●		●		●
Sound	●		●		●
Diversity of Living Things				●	●	●
Rocks and Soil		●				●
Force, Work and Energy	●		●
Family and Community	●
Motion and Measurement				●
Maths		●

UC Unified Council · SZ SilverZone · ITO Indian Talent. Humming Bird gives no class-wise topic list. Checked on each organiser's own syllabus, 8 Nov 2026.

A sample question with the answer

1. When an iron gate is left in rain for a long time, it gets a brown, flaky layer. What is this called?

Freezing
Rusting
Growing
Melting

Answer: B) Rusting

Iron reacts with air and water to form rust, a brown flaky layer. It is a change, not growth.

Questions parents ask

Do you have previous year papers for the Class 3 Science Olympiad?

We do not share the papers themselves. Our practice follows real papers from 2024-25 and 2025-26, in the same pattern, each with its answer explained.

How should my child prepare for the Class 3 Science Olympiad?

A few questions a day, and one timed mock paper a week. Then give extra time to the topics Parents' Corner marks "Practise next". The hardest section carries more marks, so practise it too.

More free practice

Class 3: Maths · English · General Knowledge · Computer · Social Studies · Spell Bee · Talent Test · Reasoning · Mental Maths · Green · Space

Science: Class 1 · Class 2 · Class 4 · Class 5 · Class 6 · Class 7 · Class 8

Every olympiad for Class 3 · All olympiads A to Z

Olympiad Owl is a free, independent practice app. It is not connected with or endorsed by any Olympiad organiser; exam names are used only to describe what the practice is for. Every question is written for this app.