Level 1 ISO Previous Year Papers Class 3

Level 1 ISO Previous Year Papers Class 3 help students to prepare themselves for the Science Competitive exams of Class 3 and also helps them to achieve excellence in their academics. These previous papers help students to prepare themselves for the Science Olympiad exams and also helps them to achieve excellence in their academics. We've all learned the expression "consistency is key," which signifies that the more you are doing something, the better you'll get at it. A relatively similar concept applies when students solve Previous Year Question Papers for Class 3. When individuals solve those problems recurrently, they will gain a better understanding of the formula or understand the strategies, allowing them to continue improving their performance and efficiency and perform commendably in exams. Class 3 students attempting the ISO exam can use the previous year question papers as a tool for Olympiad preparation. Such question papers encompass practice OMR answer sheets as well as an answer key.


Total Questions : 40

Time : 65 Minutes


1. Additional 10 minutes will be given to students to fill up the student’s information before the start of the exam.
2. All questions are compulsory and carry equal marks. Use of calculator is not permitted.
3. There is only one correct answer, hence mark one choice only.
4. Rough work should be done on a blank sheet of paper.


1. Which do not feed their young
a. Reptiles
b. Birds
c. Mammals
d. None


2. What do you call an that eats only plants?
a. Carnivore
b. Herbivore
c. Omnivore
d. None


3. What does a seed contain that provides energy for germination ?
a. Water
b. Stored food
c. Soil
d. Sunlight


4. What is the role of a producer in a food chain?
a. Preys on animals
b. Eats decayed animals
c. Makes food
d. Eats plants


5. Which of these will cause water to change to ice?
a. Putting the water in the sunlight
b. Adding salt to the water
c. Stirring the water
d. Removing heat from the water


6. The distance between one point on a compression and the corresponding point on the next compression in a sound wave is called a ______.
a. Crest
b. Wavelength
c. Trough
d. Rarefaction


7. Sponges are classified as animals because they cannot__
a. Make their own food
b. Catch their own food
c. Move from place to place
d. Get rid of waste products


8. An object is traveling north at a speed of 12 kilometers per Hour. Which characteristic of the object is being described?
a. Temperature
b. Volume
c. Motion
d. Matter


9. The first manned-mission to land on the moon was commanded by Neil Armstrong and was called---
a. Apollo 11
b. Gemini 3
c. Viking 2
d. Mariner 7


10. Which of the following is not a fossil fuel?
a. Wood
b. Petroleum
c. Natural gas
d. Coal


11. Which of these is important in the formation of clouds?
a. The melting of the polar ice caps
b. The cariolis effect
c. The relative length of day and night
d. The cooling of air as it rises


12. What is usually responsible for an earthquake?
a. Force changes from the moon pulling on Earth
b. Pressure building within the mantle
c. Slippage along faults within Earth’s crust
d. Weathering along coastlines


13. If the polar ice caps were to melt, all of the following would occur except___
a. Decreased ocean salinity
b. Increased sea level
c. Decreased tidal action
d. Increased coastal flooding


14. If there were a slight increase in the amount of solar energy that reached the Earth, there would be an immediate increase in---
a. Erosion
b. Evaporation
c. Volcanic activity
d. Groundwater flow



In this picture, the iron fillings show the shape of the magnetic________
a. Core
b. Field
c. Pole
d. Axis

16. Which of these objects in the solar system has been visited by people from earth?
a. Asteroid
b. Moon
c. Sun
d. Mars


17. Which of these transmits sound the fastest?
a. Air in a balloon
b. A metal rod
c. Empty space
d. Water in a pool


18. Any living thing that depends on a producer for food is a_____
a. Omnivore
b. Consumer
c. Predator
d. Decomposer


19. In coming years skin related to disorders will become more common due to:
a. Excessive use of detergents
b. Water pollution
c. Air pollution
d. Depletion of ozone layer


20. When ice melts in a beaker of water, the level of water in breaker will :
a. Increase
b. Decrease
c. Remains the same
d. First increase and the decrease


21. When iron and wood are exposed to the sunlight, the iron rod become hot quickly because:
a. Greater thermal conducting of iron
b. Lower thermal conducting of iron
c. More density of iron
d. less density of iron


22. Find out the correct answer out of the four alternatives given below each question and then mark it in your answer sheet.
Ice : Coolness :: Earth: ?
a. Forest
b. Heat
c. Gravitation
d. Ocean


23. Select the one which is different from the other three
a. Bible
b. Panchasheela
c. Geeta
d. Quran


24. In following question, group the given figure into three classes using each

a. 1,2,6 ; 3,4,7 ; 5
b. 1,3 ; 2,6 ; 4,5,7
c. 1,2,6,7 ; 3; 4,5
d. 1,3 ; 2,4,5 ; 6,7

Direction (25-28) Find the word that names a necessary part of the underlined word.

25. Harvest

a. Autumn
b. Stockpile
c. Tractor
d. Crop


26. Town
a. Residents
b. Skyscrapers
c. Parks
d. Libraries


27. Vibration
a. Motion
b. Electricity
c. Science
d. Sound


28. Desert
a. Cactus
b. Arid
c. Oasis
d. Flat


Direction (29-30) three of the words will be in the same classification, the remaining one will not be. Your answer will be the one word that does NOT belong in the same classification as the others.

29. Which word does NOT belong with the others?
a. Tulip
b. Rose
c. Bud
d. Daisy


30. Which word does NOT belong with the others?
a. Cornea
b. Retina
c. Pupil
d. Vision


31. Arrange the words given below in a meaningful sequence.
1. Family
2. Community
3. Member
4. Locality
5. Country
a. 3,1,2,4,5
b. 3,1,2,5,4,
c. 3,1,4,2,5,
d. 3,1,4,5,2,


32. Which number replace the question mark?

a. 7
b. 8
c. 6
d. 5


33. Which number replace the question mark?

a. 43
b. 46
c. 44
d. 41


34. Which number replace the question mark?

a. 35
b. 38
c. 37
d. 40


35. Rubber, glass, and plastic are good___
a. Insulators
b. Electromagnets
c. Conductors
d. generato


36. The seasons are caused by the Earth’s tilt and its______
a. revolution around the sun
b. revolution around the moon
c. oceans
d. rotation


37. clouds that look like cotton puffs are______
a. Cirrus
b. Cumulus
c. Nimbostratus
d. Stratus


38. The poles are the places where:
a. Santa claus lives.
b. a magnet’s pull is the strongest, and they are called N and S
c. magnet’s pull is the weakest, and they are called E and W.
d. the middle of the magnet meets.


39. Which is a mammal that lives in the water?
a. Frog
b. Turtle
c. Whale
d. Shark


40. Choose the pair that best represents a similar relationship to the one expressed in the original pairs of words
Monk : Devotion
a. Maniac : pacifism
b. Explorer : contentment
c. visionary : complacency
d. d rover : wanderlust