CREST Science Olympiad Class 8 Previous Year Papers

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Syllabus:

Section 1: Crop Production and Management, Microorganisms, Synthetic Fibres and Plastics, Metals and Non-metals, Coal and Petroleum, Combustion and Flame, Conservation of Plants and Animals, Cell, Reproduction and Endocrine System, Force and Pressure, Friction, Sound, Chemical Effects of Electric Current, Some Natural Phenomena, Light, Stars and the Solar System, Pollution of Air and Water.

Achievers Section: Higher Order Thinking Questions - Syllabus as per Section 1

Sample Paper Previous Year Paper Marking Scheme Free Study Material

Q.1

Q.2

Q.3

Q.4

Q.5

Q.6

Q.7

Q.8

Q.9

Q.10

Q.1	Which of the following pairs cannot undergo displacement reaction?
	a) Iron sulphate solution and magnesium		b) Zinc sulphate solution and iron
	c) Zinc sulphate solution and calcium		d) Silver nitrate solution and copper

Q.2	What benefit does yeast gain from carrying out fermentation?
	a) Carbon dioxide is available for photosynthesis.		b) Energy is available for growth.
	c) Ethanol is available for growth.		d) Glucose is available for respiration.

Q.3	Four students made the following statements about the metals: Robert: Metals are malleable. Arya: All metal oxides are acidic in nature. James: Metals have lustre. Peter: Metal atoms have 1, 2 or 3 electrons in the outermost shell. Which among them spoke incorrectly?
	a) Only Robert		b) Only Arya
	c) Both James and Arya		d) Both James and Peter

Q.4	Susan was walking on ice, her mother advised her to take smaller steps to avoid slipping. Which of the following could be the reason for the smaller steps?
	a) The frictional force of ice is large.		b) Normal reaction is larger.
	c) The frictional force of ice is small.		d) Normal reaction is smaller.

Q.5	James noticed that a flame produced by burning wood is orange-yellow, while a Bunsen burner flame is blue. What is the primary reason for this difference in flame colour?
	a) Wood releases different gases, causing a coloured flame.		b) The temperature of the flame determines its colour.
	c) The presence of impurities in wood affects the flame colour.		d) The combustion of different materials produces varying flame colours.

Q.6	Different microorganisms taking part in the nitrogen cycle are: (i) Rhizobium in roots (ii) Ammonifying bacteria (iii) Nitrifying bacteria (iv) Denitrifying bacteria Which of them strictly work under anaerobic conditions?
	a) Only iv		b) i and iv
	c) i, ii and iv		d) ii and iv

Q.7	The diagram shows the process of purification of copper metal. A thick copper plate A of impure copper and a thin pure copper plate B are immersed in a metal sulphate solution and an electric current is passed through it. 1. Which metal solution is taken as electrolyte? 2. Which electrode is connected to the positive terminal of the battery?
	a) 1-Copper sulphate solution 2-The thick plate of impure copper (Anode)		b) 1-Iron sulphate solution 2-The thick plate of impure copper (Cathode)
	c) 1-Copper sulphate solution 2-The thin plate of pure copper (Anode)		d) 1-Iron sulphate solution 2-The thin plate of pure copper (Cathode)

Q.8	In the given question, an assertion and a reason are given. Choose the correct option: Assertion: The temperature increases inside the fractionating column on going from the bottom to the top. Reason: The column is not heated at the bottom.
	a) Both assertion and reason are true and reason is the correct explanation of assertion.		b) Both assertion and reason are true, but reason is not the correct explanation of the assertion.
	c) Assertion is correct, but reason is incorrect.		d) Both assertion and reason are incorrect.

Q.9	Ron placed an object at a distance 2 m from a plane mirror. He then shifted the object 0.5 m away from the mirror. What is the distance between the object and its image?
	a) 2 m		b) 1.5 m
	c) 5 m		d) 3 m

Q.10	When the angle between two plane mirrors is 60o, how many multiple images will be formed by the mirrors?
	a) 5		b) 6
	c) 7		d) 8

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Students can download the CREST Science Olympiad previous year paper pdf for class 8 from this page. Each question in the paper carries 1 mark. The answer key for all the questions is also provided on the last page.

One of the most significant advantages of solving the past years’ papers is that it helps students improve their time management skills, strengthens their understanding of concepts and aids them in applying the concepts they have mastered. Also, solving previous years’ papers a few days before the exam can help students to revise the concepts quickly. Therefore, students must refer to previous years' papers before appearing for the final exam as many advantages are associated with it.

Additional Preparation Resources

Students can also refer to the following resources to level up their CREST Science Olympiad (CSO) exam preparation for class 8 -

1. CREST Science Worksheets Package for class 8 - It is a package of 5 worksheets. The worksheets are in the same pattern as the previous year paper. Hence, very useful for preparation. Existing users can purchase additional practice worksheets by following these steps: Login at https://www.crestolympiads.com/login -> Dashboard -> Additional Practice -> Buy & new users can visit https://www.crestolympiads.com/registration
2. CREST Science Olympiad book for class 8 - The book covers topic-wise reading material, chapter-wise practice questions with answer key & contains the previous year paper. The book is available in both physical and pdf formats. Proceed now to purchase the Olympiad book. Also, students can view & download the first chapter of the Science Olympiad book for class 8 for free.

Note: Don’t forget to download the CREST Science Olympiad past year paper pdf for class 8.