International Olympiad of Science (iOS) 2026-27
SilverZone iOS is the science olympiad that SilverZone runs for Classes 1 to 12. Top scorers go on to Level 2, and in Classes 6 to 12 to Level 3.
When is SilverZone iOS 2026-27?
Level 1, school picks one: 14 Oct 202619 Nov 20268 Dec 2026
Levels 2 and 3: dates not yet published.
Online or on paper.
How do I register my child, and what does it cost?
Individual or through school, online or offline (SilverZone's own website). A school can become an exam centre free. It usually needs at least 20 to 40 children taking part. Last date: up to 15 days before the exam date the school picks (deadline extended). Fee: shown only when you register.
What is in the paper?
| Classes | Questions | Minutes |
|---|---|---|
| 1–2 | 25 | 40 |
| 3–5 | 30 | 40 |
| 6–8 | 35 | 40 |
| 9–12 | 40 | 50 |
Total 100 marks. Negative marking: not published. Language: English.
What is the syllabus?
School syllabus.
The topics, class by class, as the organiser lists them:
Class 1
Living and Non- Living Things: Living and Non-Living Things
Plants and Animals: Plants; Animals
Food and clothes: Food We Eat; Clothes We Wear
Our environment: Air; Water and its Resources
Our surroundings: Our Family and Neighbourhood · Safety Rules
Human body: Human body
Reasoning and Aptitude: Reasoning and Aptitude
Scholar’s Zone: Scholar’s Zone
Class 2
Living and Non- Living Things: Living and Non- Living Things
Plants and Animals: The Plant Kingdom · The Animal Kingdom
Our Environment: Air · Water and Weather · Our Surroundings and Safety Rules
Our Universe: Our Universe
Food and Clothes: Food We Eat and Clothes We Wear
Our Body: Parts of Human Body
Reasoning and Aptitude: Reasoning and Aptitude
Scholar’s Zone: Scholar’s Zone
Class 3
Living and Non- Living Things: Living and Non- Living Things
Plants and Animals: Animal Kingdom · Plant Kingdom
Matter, Motion and Transport: Matter · Motion and Transport · Communication and Safety Rules
Environment and Universe: Our environment, Air, Water and Weather, Our Universe
Our Body: Our Body
Reasoning and Aptitude: Reasoning and Aptitude
Scholar’s Zone: Scholar’s Zone
Class 4
Human Body: Functioning of Human Body
Rocks and Soil: Rocks · Minerals and Soil
Environment and Universe: Our Environment · Universe
Plants and Animals: Plant Kingdom · Animal Kingdom
Work, Force and Energy: Work, Force and Energy
Matter: Matter
Reasoning and Aptitude: Reasoning and Aptitude
Scholar’s Zone: Scholar’s Zone
Class 5
Matter: Matter
Environment and Natural Calamities: Our Environment · Natural Calamities · Housing
Plants and Animals: Plants · Animals
Light and Sound: Light and Sound
Our Body and Nutrition: Our Body and Nutrition
Work and Energy: Work, Force, Energy and Simple Machines
Reasoning and Aptitude: Reasoning and Aptitude
Scholar’s Zone: Scholar’s Zone
Class 6
Food: Components of Food
Materials: Sorting Materials into Groups · Separation of Substances
Living World: Body Movements · Getting to Know Plants · The Living Organisms-Characteristics and Habitats
Motion and Measurement: Motion and Measurement of distances
How Things Works: Electricity and Circuits · Fun with Magnets · Light
Air: Air Around Us
Reasoning and Aptitude: Reasoning and Aptitude
Scholar’s Zone: Scholar’s Zone
Class 7
How Stuff Works: Light · Electric Current and Its Effects · Time and Motion
Living World: Respiration · Transportation in Plants and Animals · Reproduction in Plants
Materials: Heat · Acids, Bases and Salts · Physical and Chemical Changes
Natural Resources: Wastewater story · Forest
Food: Nutrition in Plants · Nutrition in Animals
Reasoning and Aptitude: Reasoning and Aptitude
Scholar’s Zone: Scholar’s Zone
Class 8
Food: Crop Production · Microorganisms
How Stuff Works: Force and Pressure · Friction · Light · Sound · Chemical Effects of Electric Current
Living World: Reproduction in animals · Reaching the Age of Adolescence · Conservation of Plants and Animals
Materials: Coal and Petroleum · Combustion and Flame
Natural Phenomena: Some Natural Phenomena
Reasoning and Aptitude: Reasoning and Aptitude
Scholar’s Zone: Scholar’s Zone
Syllabus topics and a sample question for your child's class:
Is there a Level 2, and who goes?
Three levels (Level 2: Classes 3 to 12; Level 3: Classes 6 to 12).
Level 2: children ranked 4th to 1003rd in Level 1 with 50% or more, and school toppers with 75% or more where 100 or more children took the subject. Level 3: the international first-rank holders of Classes 6 to 12 in Level 2 (held in New Delhi, or Dubai for schools outside India, in 2026-27).
When do results come, and what can my child win?
2026-27 result dates not published yet. See them on SilverZone's results page: choose the olympiad and level, then enter the enrolment number and access code with the child's and a parent's details.
- Every child: a certificate with their class, zone, state and olympiad ranks
- School medals for top 3 (50% or more)
- International cash prizes for top ranks
Where can I find SilverZone iOS sample papers and previous year papers?
A class-wise syllabus and sample paper to download free on each olympiad's page, and a sample answer sheet (OMR). Olympiad Owl does not share the papers themselves. Our class pages above have a free sample question each, and the app has full mock papers in the previous year paper pattern.
How can my child prepare for SilverZone iOS?
A few questions a day in the real pattern, and one full timed paper a week, works better than a last-minute rush.
From SilverZone's own website, 26 Oct 2026.
Science olympiads compared
Every olympiad by SilverZone
Every olympiad date for 2026-27