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

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Q.5

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Q.8

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Q.10

Q.1	Fill in the blank: For showing the full image of an object, the size of the plane mirror should be at least ____________.
	a) two times of the object		b) 1/2 of the object
	c) 1/4th of the object		d) 1/3rd of the object

Q.2	Stars twinkle but planets do not twinkle. Which of the following is the correct reason for the above-given statement?
	a) Stars emit their own light but planets receive light from the stars.		b) Stars do not form a part of the solar system.
	c) Stars form a point source of light while planets are considered as a collection of a large number of point sources of light.		d) During refraction of star light from the atmosphere, star light bends more towards the normal as compared to the planets.

Q.3	Choose the correct option and complete the following sentence: The formation of sulphur trioxide from sulphur dioxide and oxygen is an ____________ reaction.
	a) endothermic as well as redox		b) endothermic as well as precipitation
	c) exothermic as well as redox		d) exothermic as well as precipitation

Q.4	What happens in the following reaction? Fe2O3 + 3C → 2Fe + 3CO
	a) Fe undergoes oxidation and C undergoes reduction		b) Fe undergoes reduction and C undergoes oxidation
	c) Both Fe and C undergo reduction		d) Both Fe and C undergo oxidation

Q.5	In the following question, an assertion and a reason are given. Choose the correct option: Assertion: The forces acting on a body can be replaced by the resultant force only as regards the motion of the body as a whole. Reason: The resultant force cannot replace the several forces acting on a body in other respects.
	a) Both assertion and reason are CORRECT and reason is the CORRECT explanation of the assertion		b) Both assertion and reason are CORRECT, but reason is NOT THE CORRECT explanation of the assertion
	c) Assertion is CORRECT, but reason is INCORRECT		d) Assertion is INCORRECT, but reason is CORRECT

Q.6	Fill in the blank: To a small quantity of X, few drops of HCl are added. Consequently, colourless, odourless gas is produced. This gas on passing through lime water turns it milky proving the presence of ____________ of X.
	a) carbonate		b) bicarbonate
	c) carbide		d) either carbonate or bicarbonate

Q.7	Which of the following problem is not related to our environment?
	a) Afforestation		b) Ocean acidification
	c) Invasive species		d) Desertification

Q.8	In heavy vehicles, diesel is used as a fuel. Which of the following could be the reason for this?
	a) It has more mileage and is safe for the engine.		b) It is less costly and useful in fuel savings.
	c) It has high power and is convenient.		d) It is cheaper in comparison to petrol.

Q.9	During a lab experiment, Mark used a dye to stain a cell to observe its various structures. Which cellular structure would likely appear colorless or transparent due to this staining process?
	a) Nucleus		b) Mitochondria
	c) Cell membrane		d) Endoplasmic reticulum

Q.10	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.

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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.