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🔬 Science · Class 3

SOF ISO Class 3: syllabus, paper pattern and sample questions

The SOF International Science Olympiad (formerly NSO) for Class 3 is a 60-minute paper of 35 questions for 40 marks in 3 sections. Every question has four options and one right answer. The last 5 questions are the Achievers Section, worth 2 marks each. Below: how the paper is set out, the 11 chapters it draws on, one sample question from each section with its answer, and how to practise it for free.

Practise ISO Class 3 freeSee sample questions

Paper pattern

ISO Class 3 is set out in 3 sections. Sprinto's mock tests and printed papers follow the same order, counts and marks.

SectionQuestionsMarks eachMarks
1.Logical Reasoning515
2.Science25125
3.Achievers Sectionhardest5210
Total · 60 minutes3540

Syllabus: the 11 chapters

Every question on the paper belongs to one of these chapters. On Sprinto's map each chapter is an island, and the Achievers Section is the same chapters asked harder — not a separate topic.

  1. 1.Plants and AnimalsSections 2 and 3 · "Green Grove" on the map
  2. 2.BirdsSections 2 and 3 · "Bird Bluff" on the map
  3. 3.FoodSections 2 and 3 · "Healthy Harbour" on the map
  4. 4.Housing, Clothing and OccupationSections 2 and 3 · "Home Cove" on the map
  5. 5.Transport, Communication and Safety RulesSections 2 and 3 · "Busy Bay" on the map
  6. 6.Human BodySections 2 and 3 · "Body Bay" on the map
  7. 7.Earth and UniverseSections 2 and 3 · "Star Summit" on the map
  8. 8.Matter and MaterialsSections 2 and 3 · "Matter Mesa" on the map
  9. 9.Light, Sound and ForceSections 2 and 3 · "Energy Edge" on the map
  10. 10.Our EnvironmentSections 2 and 3 · "Eco Isle" on the map
  11. 11.Logical ReasoningSection 1 · "Puzzle Peak" on the map

Sample questions with answers

One from each section, taken from Sprinto's own bank for ISO Class 3. In the app the numbers, names and figures are different every time; these are fixed so you can read them.

  1. Sample 1 · Section 1: Logical Reasoning · Logical Reasoning

    Which shape comes next in the pattern?

    Pattern?

    Answer: (D)

    The pattern repeats every 2 shapes, so the next one is a pentagon.

  2. Sample 2 · Section 2: Science · Plants and Animals

    What is a baby butterfly called?

    Answer: (C) Caterpillar

    A baby butterfly is called a caterpillar.

  3. Sample 3 · Section 3: Achievers Section · Food · Achievers difficulty

    Read the statements about food given below.

    (i) We get honey from an animal.

    (ii) We get sugar from a plant.

    (iii) Milk is a body-building food.

    Which of these is/are correct?

    Answer: (A) All of these

    (i) is correct. (ii) is correct. (iii) is correct. So all of these are right.

How to practise ISO Class 3 on Sprinto

  • One island per chapter. A hidden rating per chapter picks the next science question at the difficulty that is just hard enough today.
  • Mistakes come back. Anything she gets wrong returns a few days later, then a week, then a month, until it stops being a mistake.
  • Mock tests in the real shape. 35 questions, 3 sections, 60 minutes, marked the moment she hands it in.
  • Papers you can print. A full ISO Class 3 paper with an OMR sheet, sat at the table with a pencil.

Free, with no ads and nothing to buy. A parent signs in with Google once; the child taps her face and starts.

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