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.10

Q.1	Read the following questions and choose the correct option: (i) Under similar conditions, in which of the following gases will the speed of sound be the least? (ii) The velocity of sound in a gas is 4 times that in the air at the same temperature. When a tuning fork is sounded in air a wave of frequency 480 Hz and wavelength λ1 is produced. The same fork is sounded in the gas and if λ2 is the wavelength of the wave, Find λ2/ λ1.
	a) (i)-Nitrogen, (ii)-2		b) (i)-Oxygen, (ii)-4
	c) (i)-Carbon dioxide, (ii)-1/2		d) (i)-Sulphur dioxide, (ii)-4

Q.2	Fill in the blank: Bronze statues and articles of copper slowly tarnish in air and turn green. This green colour is due to the formation of ___________.
	a) copper carbonate		b) an oxalate
	c) copper sulphate		d) copper oxide

Q.3	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.4	A ray of light strikes a silvered surface inclined to another one at an angle of 90o. Then the reflected ray will turn through __________.
	a) 0o		b) 45o
	c) 90o		d) 180o

Q.5	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.6	Not all the planets spin on their axis in the same direction, as they go around the Sun. On which planet would you see the sun rise in the west and set in the east?
	a) Mars		b) Venus
	c) Mercury		d) Neptune

Q.7	A sound wave travels from air to glass. The velocity of sound in air is va and the wavelength is λa. What is the velocity in glass, if the wavelength of the sound wave in the glass is λg?
	a) λg vg/va		b) λg va/λa
	c) λa va/vg		d) λa va/λg

Q.8	Consider the following clues about an element 'X': Clue 1: X is soft and can be cut easily with a knife. Clue 2: It is very reactive and cannot be kept open in the air. Clue 3: It reacts vigorously with water.  Identify 'X':
	a) Magnesium		b) Potassium
	c) Phosphorus		d) Aluminium

Q.9	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.10	Choose the correct option and complete the following sentence: When the distance between the object and the plane mirror increases ______________.
	a) the image remains same		b) the size of the image will become less than the size of the object
	c) the distance between the image and the plane mirror increases		d) the distance between the image and the plane mirror decreases

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.