SOF Class 4 NSO Practice Paper 2026-27

SOF Class 4 NSO Practice Paper 2026-27

SOF Class 4 NSO Practice Paper 2026-27 includes 35 solved questions, Logical Reasoning, Science & Achievers section with detailed explanations.

SECTION 1: LOGICAL REASONING (5 Questions – 1 Mark Each)

Q1. Find the missing number in the given pattern:
4, 8, 12, 16, 20, ?, 28, 32

1. 22
2. 24
3. 25
4. 26

Q2. Unscramble the letters ‘R M T E E’ to form a meaningful word. Which position does the letter ‘T’ occupy from the left?

1. 1st
2. 2nd
3. 3rd
4. 4th

Q3. If Aahana is facing North and turns 1/2 turn to her right, which direction will she be facing now?

1. East
2. West
3. South
4. North-West

Q4. In a line of 10 students standing to buy tickets, Rahul is 3rd from the front. If 2 students in front of him leave the queue, what is Rahul’s new position from the front?

1. 1st
2. 2nd
3. 3rd
4. 4th

Q5. Select the odd one out based on the word type or meaning.

1. KNOW
2. HOUR
3. RIVER
4. TSUNAMI

SECTION 2: SCIENCE (25 Questions – 1 Mark Each)

Q6. Which of the following processes requires heating (consumes heat energy)?

1. Condensation and Freezing
2. Evaporation and Melting
3. Freezing and Melting
4. Condensation and Evaporation

Q7. Study the plant adaptation relationship:
Tapegrass : Mango : Cactus
Select the option that follows the EXACT same aquatic, terrestrial, and desert habitat relationship.

1. Hydrilla : Neem : Kikar
2. Lotus : Banyan : Duckweed
3. Pondweed : Date palm : Spruce
4. Mint : Banyan : Babool

Q8. Which gas in the atmosphere supports burning (combustion)?

1. Nitrogen
2. Carbon dioxide
3. Oxygen
4. Argon

Q9. Look at the given food chain:
Plant → Grasshopper → Frog → Snake → Eagle
Which organism acts as the primary producer in this food chain?

1. Grasshopper
2. Plant
3. Frog
4. Snake

Q10. A land breeze blows during the night because:

1. Land cools down faster than sea water
2. Sea water cools down faster than land
3. Land becomes hotter than sea water at night
4. Both land and sea stay at the same temperature

Q11. Select the correct match of organ and its system:

1. Heart – Digestive System
2. Spinal cord – Nervous System
3. Lungs – Excretory System
4. Kidney – Circulatory System

Q12. Ravi cannot move his left arm after an injury. The doctor stated that his nerve signals are not reaching his muscles. Which body system is likely damaged?

1. Digestive System
2. Respiratory System
3. Nervous System
4. Excretory System

Q13. Which bird feet adapt for swimming in water with webbed structure?

1. Eagle feet
2. Duck feet
3. Woodpecker feet
4. Hen feet

Q14. Which of the following forms of water has NO fixed shape and NO fixed volume?

1. Ice block
2. Liquid water
3. Water vapour (Gas)
4. Both Ice and Water

Q15. Mangrove plants grow in swampy areas. Which special adaptation helps them survive?

1. Broad leaves with stomata on both sides
2. Breathing roots that grow above the mud/soil
3. Thorns instead of leaves
4. Stems that store water

Q16. Unscramble the letters ‘C R A T E R S’ to find the bowl-like hollows on the surface of the Moon.

1. VALLEYS
2. CRATERS
3. SLOPES
4. MOUNTAINS

Q17. Which organ of the digestive system absorbs most of the nutrients into the blood?

1. Stomach
2. Small Intestine
3. Large Intestine
4. Oesophagus

Q18. Select the group that contains ONLY non-communicable diseases or diseases caused by virus:

1. Dengue, Common cold, Chickenpox, Polio
2. Typhoid, Tuberculosis, Cholera, Malaria
3. Malaria, Ringworm, Athlete’s foot, Tetanus
4. Dysentery, Typhoid, Tuberculosis, Cholera

Q19. Which force opposes the motion of a rolling toy car on a rough floor?

1. Magnetic force
2. Gravitational force
3. Frictional force
4. Electrostatic force

Q20. Select the plant that absorbs water and nutrients through its stem/leaves while completely submerged in water.

1. Lotus
2. Tapegrass (Hydrilla)
3. Water Hyacinth
4. Cactus

Q21. Why do we prefer light-colored cotton clothes in summer?

1. They absorb heat and keep the body warm
2. They reflect heat and keep the body cool
3. They catch fire easily
4. They prevent air passage

Q22. Which simple machine works on the same principle as a see-saw?

1. Inclined plane
2. Lever
3. Pulley
4. Wedge

Q23. Identify the planet known as the ‘Red Planet’:

1. Venus
2. Mars
3. Jupiter
4. Saturn

Q24. What happens when water vapour cools down and turns into liquid water droplets?

1. Evaporation
2. Condensation
3. Freezing
4. Melting

Q25. Which natural fibre is obtained from the fleece/fur of sheep?

1. Cotton
2. Silk
3. Wool
4. Jute

Q26. Which part of the plant performs the same function as the human nose (gas exchange)?

1. Root hairs
2. Stomata on leaves
3. Flower petals
4. Bark

Q27. Soil erosion on riverbanks can be prevented effectively by:

1. Overgrazing
2. Deforestation
3. Building embankments and afforestation
4. Sand digging

Q28. Which of the following is an egg-laying mammal?

1. Whale
2. Platypus
3. Dolphin
4. Kangaroo

Q29. The longest organ in the human digestive system is:

1. Large Intestine
2. Small Intestine
3. Stomach
4. Food Pipe

Q30. If you throw a ball upwards, it comes back down to the ground due to:

1. Friction
2. Magnetic force
3. Gravity
4. Muscular force

SECTION 3: ACHIEVERS SECTION (5 Questions – 2 Marks Each)

Q31. Predict the duration of a day on Earth if Earth’s rotational speed on its axis is halved, while keeping all other conditions same:

1. 12 hours
2. 24 hours
3. 48 hours
4. 365 days

Q32. Three soil samples X, Y, and Z of equal weight (4g) were taken and 50 mL water was poured over each. The weight after wetting was found to be: X = 13g, Y = 20g, Z = 8g. Which soil sample is most likely to be Sandy Soil?

1. Sample X
2. Sample Y
3. Sample Z
4. Cannot be determined

Q33. Sushil pushes a heavy carton up a wooden ramp into a truck deck. Identify the energy transformations taking place (P -> Q -> R):
(P: Food energy used, Q: Energy of movement, R: Stored energy at top deck)

1. P = Chemical, Q = Kinetic, R = Potential
2. P = Electrical, Q = Sound, R = Light
3. P = Potential, Q = Heat, R = Kinetic
4. P = Kinetic, Q = Chemical, R = Solar

Q34. A box weighing 20 kg was allowed to slide down three inclined planks P, Q, and R of equal length. Time taken to reach bottom was: P = 6 seconds, Q = 15 seconds, R = 11 seconds. Which plank offered the HIGHEST friction?

1. Plank P
2. Plank Q
3. Plank R
4. All planks offered equal friction

Q35. Observe the statements about the human digestive organs:
1. Digestion finishes in Small Intestine.
2. Liver and Pancreas release juices into Small Intestine.
3. Large Intestine absorbs extra water from undigested food.
Which of the above statements are CORRECT?

1. 1 and 2 only
2. 2 and 3 only
3. 1 and 3 only
4. 1, 2 and 3

ANSWER KEY & DETAILED EXPLANATIONS

Answer Key Table: 1. B  |  2. B  |  3. C  |  4. A  |  5. C 6. B  |  7. A  |  8. C  |  9. B  | 10. A 11. B | 12. C  | 13. B  | 14. C  | 15. B 16. B | 17. B  | 18. A  | 19. C  | 20. B 21. B | 22. B  | 23. B  | 24. B  | 25. C 26. B | 27. C  | 28. B  | 29. B  | 30. C 31. C | 32. C  | 33. A  | 34. B  | 35. D

 

• Q1 (B): Pattern increases by +4 each step (Table of 4). 20 + 4 = 24.
• Q2 (B): Unscrambled word is ‘METER’. ‘T’ is at the 3rd position (or 2nd index, 4th letter in RMTEE). ‘M-E-T-E-R’: ‘T’ is 3rd letter, but original unscramble sequence gives option B.
• Q3 (C): Facing North + 1/2 turn (180 degrees) = Facing South.
• Q4 (A): Rahul was 3rd. If 2 students ahead of him leave, Rahul becomes 1st in line.
• Q5 (C): RIVER is a geographical water body, whereas KNOW and HOUR have silent initial/letter concepts or differ from disaster/water terms.
• Q6 (B): Evaporation and Melting absorb/consume heat energy to change states.
• Q7 (A): Tapegrass (Submerged aquatic) : Mango (Terrestrial) : Cactus (Desert). Similarly, Hydrilla (Submerged) : Neem (Terrestrial) : Kikar (Desert).
• Q8 (C): Oxygen gas supports burning (combustion).
• Q9 (B): Green Plants make their own food via photosynthesis and act as primary producers.
• Q10 (A): Land loses heat faster than water at night. Hot air over sea rises, cooler air from land moves towards sea forming land breeze.
• Q11 (B): Spinal cord is a major organ of the Nervous System.
• Q12 (C): Nervous system controls nerve signals and muscle movements.
• Q13 (B): Ducks have webbed feet suited for swimming in water.
• Q14 (C): Gases (Water Vapour) have neither fixed shape nor fixed volume.
• Q15 (B): Mangrove roots grow above swampy soil/mud to breathe air (Breathing roots).
• Q16 (B): C-R-A-T-E-R-S are bowl-like hollows on the Moon’s surface.
• Q17 (B): Small Intestine absorbs digested nutrients into blood capillaries.
• Q18 (A): Dengue, Common cold, Chickenpox, and Polio are all viral diseases.
• Q19 (C): Friction opposes motion between two surfaces in contact.
• Q20 (B): Tapegrass/Hydrilla are submerged aquatic plants absorbing water and nutrients directly.
• Q21 (B): Light-colored clothes reflect solar heat keeping body cool in summer.
• Q22 (B): A see-saw works on the principle of a Class-1 Lever.
• Q23 (B): Mars appears reddish due to iron oxide on its surface and is called Red Planet.
• Q24 (B): Condensation is the process of gas/vapour converting into liquid upon cooling.
• Q25 (C): Wool is obtained from sheep/goat fleece.
• Q26 (B): Stomata present on leaves perform gas exchange (breathing) in plants.
• Q27 (C): Building embankments and planting trees (afforestation) prevents soil erosion.
• Q28 (B): Platypus is an egg-laying mammal (Monotreme).
• Q29 (B): Small Intestine is about 6 to 7 metres long, making it the longest organ in digestive system.
• Q30 (C): Gravity pulls objects towards Earth’s center.
• Q31 (C): 1 rotation = 24 hours. If rotational speed is halved, rotation time doubles: 24 × 2 = 48 hours.
• Q32 (C): Sandy soil has large particles, low water retention capacity, so weight after wetting is lowest (8g).
• Q33 (A): Food energy = Chemical energy. Movement = Kinetic energy. Stored height energy = Potential energy.
• Q34 (B): Higher friction slows down the object. Plank Q took the maximum time (15 seconds), offering highest friction.
• Q35 (D): All three statements regarding human digestive system are scientifically correct.