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🔬 Science · Class 5

SOF ISO Class 5: syllabus, paper pattern and sample questions

The SOF International Science Olympiad (formerly NSO) for Class 5 is a 60-minute paper of 50 questions for 60 marks in 3 sections. Every question has four options and one right answer. The last 5 questions are the Achievers Section, worth 3 marks each. Below: how the paper is set out, the 9 chapters it draws on, one sample question from each section with its answer, and how to practise it for free.

Practise ISO Class 5 freeSee sample questions

Paper pattern

ISO Class 5 is set out in 3 sections. Sprinto's mock tests and printed papers follow the same order, counts and marks.

SectionQuestionsMarks eachMarks
1.Logical Reasoning10110
2.Science35135
3.Achievers Sectionhardest5315
Total · 60 minutes5060

Syllabus: the 9 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.PlantsSection 2 · "Green Grove" on the map
  2. 2.AnimalsSection 2 · "Animal Ark" on the map
  3. 3.Human Body and HealthSection 2 · "Body Bay" on the map
  4. 4.Natural Resources and Indian HeritageSection 2 · "Heritage Harbour" on the map
  5. 5.Pollution and CalamitiesSection 2 · "Storm Shore" on the map
  6. 6.Matter and MaterialsSection 2 · "Matter Mesa" on the map
  7. 7.Force and EnergySection 2 · "Energy Edge" on the map
  8. 8.Earth and UniverseSection 2 · "Star Summit" on the map
  9. 9.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 5. 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 figure comes next in the pattern?

    Pattern?

    Answer: (A)

    The pattern repeats every 2 figures, so the next one is a triangle.

  2. Sample 2 · Section 2: Science · Human Body and Health

    A lack of which of these causes weak bones?

    Answer: (B) calcium

    weak bones is caused by too little calcium, which we get from milk.

  3. Sample 3 · Section 3: Achievers Section · Logical Reasoning · Achievers difficulty

    Find the missing number, if the same rule is followed in every row.

      5   2   9
  8   1  21
  7   2   ?

    Answer: (C) 15

    In each row, (first − second) × 3 = third, so (7 − 2) × 3 = 15.

How to practise ISO Class 5 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. 50 questions, 3 sections, 60 minutes, marked the moment she hands it in.
  • Papers you can print. A full ISO Class 5 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.

Start practising