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INTSO STSO Olympiad Class 3 Questions

Physics:
1. All the planets revolves around the sun due to _______ force [ ]
1) Frictional force
2) Gravitational force
3) Electric force
4) Magnetic force

2. To move an object on the rough surface [ ]
1) Force is necessary to apply on object
2) Force need not necessary to apply on object
3) Only some times force is not necessary to apply on object
4) Only some times force is necessary to apply on object

3. When you throw a marble on a floor it stops after some time because [ ]
1) Air around the marble opposes the motion
2) Gravitational force of earth opposes the motion
3) Frictional force between floor and marble opposes the motion
4) All the above

4. When a person waiting for a bus, then [ ]
1) The work done by the person is zero
2) The work done by the person is not zero
3) The work done by the person is greater than zero
4) The work done by the person is less than zero

5. Among the following the natural source of light energy is [ ]
1) Tubelight
2) Sun
3) Moon
4) Candle

6. When a body changes its position, then it is in [ ]
1) Motion
2) Friction
3) Rest
4) Acceleration

7. Which type of energy allows us to feel the temperature get higher? [ ]
1) Light
2) Heat
4) Chemical

8. Frictional force is a ________ force [ ]
1) Contact
2) Non contact
3) Field force
4) All the above

9. Energy means that [ ]
1) Ability to walk
2) Ability to push or pull
3) Ability to do work
4) All the above

10. It takes less effort to [ ]
1) Drag the things
2) Slide the things
3) Role the things
4) All the above

11. If a car does not changes its position time to time then it is [ ]
1) At rest
2) In motion
3) Either in rest or in motion
4) Neither in rest nor in motion

12. It is easier to [ ]
1) Jump form ground to reach first floor of the building
2) Walk along the inclined stair case to reach the first floor of the building
3) Climb up along the walls to reach the first floor of the bilding.
4) None of these

13. Work done only when an object ___ on applying force [ ]
1) Move
2) Does not move
3) May be move
4) None of these

14. Which type of energy describes a moving ball on the playground? [ ]
1) Thermal
2) Electric
3) Kinetic
4) Sound

15. The measure of the pull of gravity from a planet on the mass of an object describes an object’s
1) Density
2) Buoyancy
3) Mass
4) Weight [ ]

16. Among the following examples an invisible force is [ ]
1) Gravitetional force
2) Magnetic force
3) Electrostatic force
4) All the above

17. When two bodies rub with each other, the nature of energy that emits is [ ]
1) Heat energy
2) Light energy
3) Magnetic energy
4) Gravitational energy

Chemistry:
18. Among the following, definite shape and volume is possessed by [ ]
1) solid
2) liquid
3) gas
4) all

19. A milkman brought milk in a cylindrical shaped bottle. Lakshmi look that milk and transferred into a rectangular shaped steel utensil. Then, volume of the milk is [ ]
1) increased
2) Remains same
3) Cannot be predicted
4) Decreased

20. Classify the following substances as water soluble and water insoluble substance [ ]
I) Glucose II) Rice III) Dal IV) Lemon juice V) Salt VI) Oil VII) Chalk powder VIII) Sugar

Wate soluble substance Water insoluble substance
1) I, IV, V, VIII II, III, VI, VII
2) I, IV, VI, VIII II, III, V, VII
3) II, III, VI, VII I, IV, V, VIII
4) I, IV, VI, VII II, III, V, VIII

21. The place where humidity is maximum [ ]
1) on hills
2) near sea
3) on plains
4) near fields

22. When many ice crystals stick together and fall to the ground there are called [ ]
1) freezing
2) precipitation
3) snowflakes (or) snow crystals
4) none of these

23. The process of water drops in the clouds become heavy and fall from the clouds is called
1) freezing
2) precipitation [ ]
3) snowflakes
4) snow crystals

24. Atmosphere at highest places will be [ ]
1) hot
2) warm
3) cool
4) rainy

25. A substance which dissolves in a liquid is called [ ]
1) solute
2) solvent
3) solution
4) all

26. Rani’s grand mother is boiling water in a steel utensil by keeping the plate on the utensil. After some time she found water droplets are formed on the innerpart of the plate. It was happend due to
1) Evaporation of water
2) Freezing of water
3) Condensation of water vapour
4) All of these

27. ______ in the air forms clouds [ ]
1) water
2) ice
3) water vapour
4) all

28. Examine the following statements :
Statement A : Ploar ice is melting slowly. This activity increases the sea level.
Statement B : Gases in the atmosphere release heat energy from the sun.

Which one of the following is correct with regard to the above statements ? [ ]
1) Only Statement A is correct
2) Only Statement B is correct
3) Both Statement A and Statement B are correct
4) Both Statement A and Statement B are incorrect

29. Arrange the following substances in the increasing order of force of attraction between the particles
i) Natural gas ii) Salt iii) Kerosene
1) i > ii > iii
2) i < iii< ii
3) i < ii < iii
4) iii < ii < i

30. A student does the following :
Task 1 : Takes a piece of wood and cut it into small various pieces.
Task 2 : Takes a one glass of water and keep it into the freezer to freeze it.
Task 3 : Takes one glass of water and little sugar. He dissolves the sugar into the water.
Task 4 : Takes a piece of wood and burns it.

Which of the above mentioned tasks is / are the example(s) of physical change ? [ ]
1) Task 1, 2, 3 and 4
2) Task 1, 2 and 4
3) Task 1, 2 and 3