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.10

Q.1	In the following question, an assertion and reason are given. Choose the correct option: Assertion: Fungi are a large group of organisms which do not photosynthesise. Reason: All fungi are generally made up of fine threads called hyphae.
	a) Both assertion and reason are true and reason is the correct explanation for the assertion		b) Both assertion and reason are true but reason is not the correct explanation for the assertion
	c) Assertion is true but reason is false		d) Assertion is false but reason is true

Q.2	An echo returned in 3 s. What is the distance of the reflecting surface from the source, given that the speed of sound is 342 m s-1?
	a) 520 m		b) 515 m
	c) 530 m		d) 513 m

Q.3	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.4	Which of the following problem is not related to our environment?
	a) Afforestation		b) Ocean acidification
	c) Invasive species		d) Desertification

Q.5	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.6	Select the incorrect statement:
	a) Plant cells are surrounded by a living, rigid outer layer called cell wall.		b) The plant cell wall is made up of cellulose.
	c) The bacterial cell wall is made up of peptidoglycan.		d) Both prokaryotic and eukaryotic plasma membranes are composed of lipids and proteins.

Q.7	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.8	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.9	Which of the following shows the correct sequence (in the increasing order) of heat energy received per unit area from the Sun measured on Earth, Mars and Jupiter?
	a) Jupiter > Mars > Earth		b) Earth > Mars > Jupiter
	c) Jupiter > Earth > Mars		d) Earth > Jupiter > Mars

Q.10	The sound produced by a tuning fork travel from air to glass. Which of the following physical quantities remains the same? Velocity Frequency Wavelength Amplitude
	a) Only 1		b) Only 2
	c) Both 1 and 3		d) Both 2 and 4

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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.