Question 1 of 35
Which shape is just to the right of the pentagon?
🔬 Science · Class 1 · 2026-27
SOF ISO Class 1 free mock test and sample paper
A full ISO Class 1 practice paper: 35 questions for 40 marks in 60 minutes, in the same 3 sections and order as the SOF paper. Take it here with an instant score — no login, no sign-up — or print it with an OMR sheet and the answer key. Free, with no ads.
- Questions35
- Marks40
- Time60 min
- Sections3
The paper
Tap an answer for each question. The 60-minute clock starts at your first answer; press Finish and mark at the bottom when you are done, and every answer is explained.
Section 1 — Logical Reasoning · 5 × 1 mark
- Question 2 of 35
Three of these belong together. Which one is the odd one out?
- Question 3 of 35
Which number comes next in the pattern?
- Question 4 of 35
Three of these are shaded the same way. Which one is different?
- Question 5 of 35
Which shape is just above the oval?
Section 2 — Science · 25 × 1 mark
- Question 6 of 35
Which part of our body do we use to taste our food?
- Question 7 of 35
Where does a hen live?
- Question 8 of 35
Which of these is true of all living things?
- Question 9 of 35
Which of these move across the water because the wind blows?
- Question 10 of 35
In which season the days are long and very hot?
- Question 11 of 35
Chapati belongs to which food group?
- Question 12 of 35
Which kind of plant is watermelon?
- Question 13 of 35
Which of these foods belongs to the same food group as fish?
- Question 14 of 35
Which of these is a living thing?
- Question 15 of 35
One part is missing from this plant. Which one?
- Question 16 of 35
What do we do on a windy day?
- Question 17 of 35
The young one of a duck is called a
- Question 18 of 35
Outside, our breath looks like smoke. What is the weather like?
- Question 19 of 35
Which part of a plant grows into the fruit?
- Question 20 of 35
Ice is water in which form?
- Question 21 of 35
Which of these is true about a rainbow?
- Question 22 of 35
Water is being wasted by throwing away the water used to wash rice. What should be done instead?
- Question 23 of 35
Which of these is NOT a good habit?
- Question 24 of 35
Where does a goat live?
- Question 25 of 35
"Never play with a knife or scissors" — when should you remember this rule?
- Question 26 of 35
Which of these is a non-living thing?
- Question 27 of 35
Which of these is full of air inside?
- Question 28 of 35
How many legs does an ant have?
- Question 29 of 35
Which of these changes its shape a little every night?
- Question 30 of 35
When we eat a broccoli, which part of the plant are we eating?
Section 3 — Achievers Section · 5 × 2 marks
- Question 31 of 35
Which one of these sentences is correct?
- Question 32 of 35
Match each need with the reason we have it.
(i) air
(ii) clothes
(iii) a house
P it keeps us safe from rain, heat and cold
Q we breathe it in every moment
R they keep us warm and safe
- Question 33 of 35
Match each source of water with what it does.
(i) A pond
(ii) A hand pump
(iii) A lake
P is pushed up and down to draw water up
Q is a small body of still water
R is a large body of still water
- Question 34 of 35
Curd, Sugar, Apple, Butter, Fish
How many of these are energy-giving foods?
- Question 35 of 35
Which one of these sentences is correct?
Answer key and explanations (opens below)
1. (A) 2. (A) 3. (B) 4. (A) 5. (B) 6. (B) 7. (B) 8. (B) 9. (B) 10. (C) 11. (C) 12. (C) 13. (A) 14. (D) 15. (A) 16. (D) 17. (B) 18. (B) 19. (D) 20. (A) 21. (B) 22. (D) 23. (C) 24. (D) 25. (A) 26. (A) 27. (D) 28. (B) 29. (B) 30. (B) 31. (B) 32. (A) 33. (A) 34. (A) 35. (A)
- 1. (A)
Find the pentagon first, then look one step to the right. That is the hexagon.
- 2. (A)
A semicircle, an oval and a circle are all drawn with a curved line. The star does not, so it is the odd one out.
- 3. (B)
Each number is 1 more than the one before. 6 + 1 = 7.
- 4. (A)
Do not look at the shapes — look only at the shading. Three of them match each other and one does not.
- 5. (B)
Put your finger on the oval and move it straight up one box. You land on the semicircle.
- 6. (B)
We use our tongue to taste our food. That sense is called taste.
- 7. (B)
A hen lives on land.
- 8. (B)
Every living thing grows, eats, breathes, moves on its own and has young ones. So it is true that they need food to live.
- 9. (B)
Sailing boats move across the water when the wind blows.
- 10. (C)
In summer the days are long and very hot, and May is one of its months.
- 11. (C)
Chapati is an energy-giving food — it gives us energy to run and play.
- 12. (C)
A creeper has a weak stem and spreads along the ground. Watermelon is one.
- 13. (A)
Fish and egg are both body-building foods — each one helps our body grow.
- 14. (D)
A dog grows, needs food and air, and can have young ones. The other three do none of those.
- 15. (A)
The fruit is not drawn. Without it the plant could not do this job: it keeps the seeds safe inside it.
- 16. (D)
On a windy day we fly a kite.
- 17. (B)
A baby duck is called a duckling.
- 18. (B)
When our breath looks like smoke, the day is cold.
- 19. (D)
It is the flower that grows into the fruit.
- 20. (A)
Ice is the solid form of water — you find it in the freezer.
- 21. (B)
It is true that we need both sunlight and raindrops to see a rainbow. A rainbow needs sunlight and raindrops in the sky at the same time.
- 22. (D)
Pour that water on the plants — that is how the water stops going to waste.
- 23. (C)
You should not bite your nails. The other three are habits that keep you healthy.
- 24. (D)
A goat lives in a pen.
- 25. (A)
You need that rule when you are near sharp things.
- 26. (A)
A car does not grow, does not eat and cannot have young ones, so it is non-living.
- 27. (D)
A football is filled with air. Air takes the shape of whatever it fills, which is why it can do that.
- 28. (B)
An ant has 6 legs.
- 29. (B)
The moon changes its shape a little every night. We see it at night.
- 30. (B)
The broccoli we eat is the flower of the plant.
- 31. (B)
We use our nose to smell things. Each of the other three gives one organ another organ's work.
- 32. (A)
We need air because we breathe it in every moment. We need clothes because they keep us warm and safe. We need a house because it keeps us safe from rain, heat and cold.
- 33. (A)
A pond is a small body of still water. A hand pump is pushed up and down to draw water up. A lake is a large body of still water.
- 34. (A)
An energy-giving food gives us energy to run and play. Here they are sugar, butter — 2 of the 5.
- 35. (A)
A baby sheep is called a lamb. The other three sentences give another animal's baby name.
About this mock test
- Is this ISO Class 1 mock test really free, with no login?
- Yes. The whole paper is on this page: no account, no sign-up, no phone number and no ads. Nothing your child answers here is sent anywhere or stored.
- How is it marked?
- The same way as the SOF paper: Logical Reasoning 1 mark a question, Science 1 mark a question, Achievers Section 2 marks a question, 40 marks in all. Press Finish and mark to see the score by section and the right answer, with an explanation, under every question.
- Can I print it?
- Yes. Print paper + OMR sheet lays it out like the real paper, with a bubble sheet and the answer key on its own last page so it can be set aside. Choose Save as PDF in the print dialog to keep a copy.
- Is it the same as the real ISO paper?
- It has the real paper's shape — 35 questions, the same sections in the same order, the same marks and the same 60 minutes — and its questions come from the ISO Class 1 syllabus. The questions are Sprinto's own, not SOF's; Sprinto is not affiliated with the Science Olympiad Foundation.
Fresh questions every time
This paper stays the same so it can be printed and shared. In the app every ISO Class 1 question is new, the next one is picked to be just hard enough, and mistakes come back until they stick. Still free.