IOA International Science Olympiad Grade 8 Sample Paper 2019 : internationalolympiadacademy.com

Organisation : International Olympiad Academy
Exam : International Science Olympiad
Document Type : Sample Paper
Class : Grade 8
Year : 2019
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IOA Science Olympiad Sample Paper

International Science Olympiad Grade 8 Sample Papers 2019

Related / Similar Question Paper : IOA Science Olympiad Grade 7 Sample Paper 2019

Science Olympiad Grade 8 Sample Paper

Foundation: (2 Points)
1. The precaution for preventing seeds from insects can be made by
(A) Sowing the properly
(B) Rejecting the unhealthy plants
(C) Timely inspection of the store houses
(D) Spraying of chemicals before hand

2. The different measures which help to increase crop yield are
(A) Improving soil fertility by scientific methods and protection of plant from pests and weeds
(B) Following suitable agricultural practices and control of plant diseases
(C) Use good quality seeds and awareness of new agricultural technology
(D) All of the above

3. Growth and multiplication of micro- organisms is better in
(A) Wet soil because it allows multiplication due to the presence of air
(B) Dry soil because it allows multiplication due to the absence of air and water
(C) Tiger soil because it allows multiplication due to the presence of air and water
(D) Loose soil because it allows multiplication due to the presence of air and water

4. Indian farmers are unhappy over the introduction of “Terminator seed Technology” because the seeds produced by this technology are expected to
(A) Give rise to sexually sterile plant
(B) From low-yielding plants despite the high quality
(C) Show poor germination
(D) Give rise to the plants incapable of forming viable seeds

5. What are the causes of food poisoning?
(A) Food poisoning could be due to the consumption of food spoilt by some microorganisms
(B) Microorganisms that grow on our food sometimes produce toxic substances which causes food poisoning
(C) Toxic substances make the food poisonous causing serious illness and even death
(D) Both a and c

6. Which of the following is not a food preservative?
(A) Sodium benzoate and sodium metabisulphite
(B) Dried leaf of neem
(C) Salt and sugar
(D) Sorbic acid and sodium sorbate

7. Virus is a connective link between living and non – living because
I. The reason for being nonliving is they neither grow nor reproduce once outside the host cell
II. They can be considered living as they multiply very fast and grow when entered the host cell
(A) Only I (B) Only II (C) Both I and II (D) None of the above

8. Plastic containers are preferred over iron containers for storing food because, plastic is
I. Non-reactive II. Durable III. Cheap and light in weight
IV. Corrosion resistant
(A) I and II (B) II and III (C) III and IV (D) All of the above

9. The disadvantages of using synthetic fibers are
I. They are cheap and affordable
II. They are wrinkle free thus, do not need ironing
III. They do not need maintenance like natural fibers
IV. They melt easily and are prone to heat damage
V. They dry quickly and do not shrink
VI. They are more elastic as compared to natural fibers
(A) Only II (B) Only IV (C) Only V (D) Both IV and VI

10. What are the factors that differentiate the different types of fibers?
I. Strength II. Water absorbing capacity
III. Nature of burning IV. Cost
V. Durability
(A) I, II, III AND IV (B) II, III and IV (C) I, II, III, IV and V (D) III and V

12. Choose the correct statement from the following
(A) It is difficult to transport natural gas through pipes
(B) The disadvantage of natural gas is that it cannot be used directly for burning in homes
(C) Natural gas is stored under high pressure as compressed natural gas
(D) Natural gas cannot be used for power generation

13. Calorific value of coal middling generated in coal washeries during washing of coal may be around _____ kcal/Kg.
(A) 4000 (B) 6000 (C) 1000 (D) 8000

14. The components of petroleum differ in their
(A) Boiling points (B) Melting points (C) Freezing points (D) Cooling points

15. Low temperature carbonization
(A) Is mainly for producing the smokeless domestic coke
(B) Produces higher Quantity of gas than high temperature carbonization
(C) Is meant for the production of ‘metallurgical coke
(D) None of these

16. Which of the following is false statement?
(A) Ideal fuel is cheap and easily available
(B) Complete combustion of a fuel gives carbon monoxide gas
(C) Inflammable substances have very low ignition temperature
(D) Combustion produces heat and light

17. Fuel gases containing hydrocarbons (i.e. coke over gas) are not preheated before burning, mainly because
(A) It reduces its calorific value tremendously
(B) The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot
(C) It reduces its flame temperature tremendously
(D) There are chances of explosion during preheating

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