CREST Science Olympiad Class 8 Previous Year Paper

Is your child preparing for the Class 8 Science Olympiad? One of the most effective ways to boost their preparation is by solving previous year question papers. These papers help students get familiar with the exam format and the types of questions they can expect.

Why Use Previous Year Papers?

• They include questions from key topics such as Crop Production and Management, Microorganisms, Synthetic Fibres and Plastics, Metals and Non-metals etc.
• They help students improve their accuracy, speed, and critical thinking skills.
• Answer keys are provided for self-evaluation and better understanding of concepts.

Download the Science Olympiad Previous Year Paper for Class 8 (PDF) to help your child revise more effectively and approach the exam with greater confidence.

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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

Previous Year Questions

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Q.2

Q.3

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Q.5

Q.6

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Q.8

Q.9

Q.10

Q.1	In the following question, an assertion and a reason are given. Choose the correct option: Assertion: A normal human eye can clearly see all the objects at a different distance. Reason: The human eye has the capacity to suitably adjust the focal length of its lens to a certain extent.
	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 the reason is INCORRECT		d) Both assertion and reason are CORRECT

Q.2	Stars twinkle but planets do not twinkle. Which of the following is the 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 starlight from the atmosphere, starlight bends more towards the normal as compared to the planets.

Q.3	Match List I (Fuel gases) with List II (Major constituents) and select the correct answer using the codes given below: List I (Fuel Gas) List II (Major Constituent) A. CNG 1. Carbon monoxide, hydrogen B. Coal gas 2. Butane, propane C. LPG 3. Methane, ethane D. Water gas 4. Hydrogen, methane, carbon monoxide
	a) A-2, B-1, C-3, D-4		b) A-3, B-4, C-2, D-1
	c) A-2, B-4, C-3, D-1		d) A-3, B-1, C-2, D-3

Q.4	In the following question, an assertion and the reason are given. Choose the correct option: Assertion: When visible light is passed through a prism, violet colour is seen at the bottom of the screen. Reason: Prism has the highest refractive index for violet light.
	a) Assertion and the reason are true and reason is the correct explanation of the assertion		b) Assertion and the reason are true, but reason is not the correct explanation of the assertion
	c) Assertion is true but reason is false		d) Both assertion and reason are false

Q.5	In the given question, an assertion and a reason are given. Choose the correct option: Assertion: In heavy vehicles, diesel is used as a fuel. Reason: Diesel has high power and is convenient.
	a) Assertion and reason are correct and reason is the correct explanation of the assertion		b) 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	A man is standing not exactly at the centre of two walls. He fires a gun and hears the first echo after 1 s and the second echo after 2 s. If the speed of the sound is 330 m/s. What is the distance between the walls?
	a) 330 m		b) 360 m
	c) 420 m		d) 495 m

Q.7	Choose the correct option and complete the following sentence: The method of zone refining of metals is based on the principle of _____________________.
	a) higher melting point of the impurity than that of the pure metal		b) greater mobility of the pure metal than that of the impurity
	c) greater solubility of the impurity in the molten state than in the solid		d) greater noble character of the solid metal than that of the impurity

Q.8	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 electrode is connected to the negative terminal of the battery? 2. What is liberated at the cathode?
	a) 1-Impure copper 2-Pure copper		b) 1-Pure copper 2-Pure copper
	c) 1-Pure copper 2-Impure copper		d) 1-Impure copper 2-Impure copper

Q.9	If an object in air is viewed from beneath the surface of water below, where does the object appear to be?
	a) The object appears above its true position.		b) The object appears exactly at is true position.
	c) The object appears below its true position.		d) The object cannot be viewed from beneath the water's surface.

Q.10	Select the wrongly matched pairs:
	a) Apiculture - Honey bee		b) Sericulture - Fish
	c) Dairy farming - Milk		d) Poultry farming - Meat

Your Score: 0/10

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.