SilverZone IOS International Olympiad of Science Sample Question Paper

Name of the Organisation : SilverZone/ Silver Zone
Name of the Exam : IOS – International Olympiad of Science
Document Type : Sample Question Paper

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Silver Zone Olympiad of Science Question Paper

Class 10th

1. Which mode of reproduction has been shown in the following figure?
(A) Asexual mode of reproduction

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(B) Sexual mode of reproduction
(C) Parthenogenesis
(D) All of these
(E) None of these

2. If 100 J of energy is available at the producer level, calculate the amount of energy available to hawk in the following food chain. Green plants -> Grasshopper -> Frog -> Snake -> Hawk
(A) 0.1 J
(B) 0.01 J
(C) 10 J
(D) 10000 J
(E) None of these

3. Examine the graph and calculate the resistance of the coil at the point Q.
(A) 12 Ohms
(B) 5.2 Ohms
(C) 13 Ohms
(D) 0.4 Ohms
(E) None of these

4. pH values of four solutions A, B, C and D are 7, 8, 9, 10 respectively. Put them in a sequence according to their nature.
(A) Acidic, acidic, neutral, basic
(B) Acidic, neutral, basic, basic
(C) Acidic, acidic, acidic, neutral
(D) Neutral, basic, basic, basic
(E) None of these

5. On which one of the following factors the strength of an electromagnet depends?
(A) The number of turns in the coil
(B) The current flowing in the coil
(C) The length of air gap between its poles
(D) All of these
(E) None of these

7. There is a device in the motor which is used to reverse the direction of current in the coil of a motor. What is the name of this device?
(A) Commutator
(B) Magnetic field
(C) Armature
(D) All of these
(E) None of these

8. What are the end products of the anaerobic respiration that the yeast perform?
(A) Carbon dioxide, water and energy
(B) Alcohol, carbon dioxide and energy
(C) Lactic acid, carbon dioxide, and energy
(D) Alcohol, water and energy
(E) None of these

9. The steps involved in making a slide of epidermal peel of leaf are given as follows:
I. pull out a thin peel from the lower surface of the leaf.
II. place a drop of glycerine on the slide.
III. stain the peel in safranin.
IV. place the stained peel of the glycerine.
V. remove the extra stain by washing with water.
VI. place the cover slip over the peel.

Which one is the correct sequence of steps to be followed?
(A) I, II, III, IV, V, VI
(B) I, III, V, II, IV, VI
(C) I, III, IV, II, V, VI
(D) I, II, IV, III, V, VI
(E) None of these

10. Examine the given circuit and calculate the total current flowing in the circuit.
(A) 28 ampere
(B) 4 ampere
(C) 0.25 ampere
(D) 3.7 ampere
(E) None of these

Class 5th

1. Which one of the following properties of light has been shown with the help of above figure?
(A) Light bends when it enters from one medium to other
(B) Light comes back into same medium after reflection
(C) Light travels in a straight line
(D) All of these
(E) None of these

2. Name the plant whose leaves are modified to thin spines to reduce the loss of water through transpiration.
(A) Water lily
(B) Sugar plant
(C) Cactus plant
(D) Mango plant
(E) None of these

3. Who of the following is correct?
Raj: Copper has shiny appearance.
Raman: Iron has shiny appearance
Rajesh: Wood has shiny appearance.
(A) Raj and Raman
(B) Raman and Rajesh
(C) Raj and Rajesh
(D) All of them
(E) None of these

4. In the following figure a disease caused due to mineral deficiency has been shown: Which mineral deficiency causes this disease?
(A) Calcium
(B) Phosphorus
(C) Iron
(D) Iodine
(E) None of these

5. Rotation of Earth on its axis is an example of which type of motion?
(A) Rectilinear motion
(B) Circular motion
(C) Rotational motion
(D) Oscillatory motion
(E) None of these

6. This is the special organ of a climber plant which helps the plant in climbing. Name the organ.
(A) Tendril
(B) Lamina
(C) Petiole
(D) Leaf blade
(E) None of these

7. One of the Abiotic components present in the environment is air. The major components of the air are Nitrogen, Oxygen, Argon, and Carbon dioxide. Select the option that shows the correct order of percentage of each component in the air in decreasing order, that is, the component with highest percentage is placed first and that with lowest is placed last.
(A) Nitrogen -> Oxygen -> Argon -> Carbon dioxide
(B) Oxygen -> Nitrogen -> Argon -> Carbon dioxide
(C) Nitrogen -> Argon -> Oxygen -> Carbon dioxide
(D) Carbon dioxide -> Oxygen -> Nitrogen -> Argon
(E) None of these

8. At what trophic level in the food chain the autotrophs are present.
(A) First trophic level
(B) Second trophic level
(C) Third trophic level
(D) Fourth trophic level
(E) None of these

9. A red car covers the distance 200 m in 20 seconds and a blue car covers the distance 20 km in 20 minutes. Which car has the greater speed?
(A) Red car
(B) Blue car
(C) Both have equal speed
(D) All of these
(E) None of these

10. Name the joint which exist between our skull and neck.
(A) Hinge joint
(B) Ball and socket joint
(C) Pivot joint
(D) Fixed joint
(E) None of these
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