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	Choose the right option to fill in the blanks below:  To electroplate an article with nickel requires a/an ______(i)______ which must be a solution containing ______(ii)_____ ions. The article to be plated is placed at the _____(iii)_____ of the cell in which the plating is carried out. The _____(iv)______ of the cell is made from pure nickel. The ions which are attracted to the negative electrode and discharged are called _____(v)______.
	a) (i)-electrolyte, (ii)-nickel, (iii)-cathode, (iv)-anode, (v)-cations		b) (i)-solute, (ii)-copper, (iii)-anode, (iv)-cathode, (v)-anions
	c) (i)-electrolyte, (ii)-nickel, (iii)-anode, (iv)-cathode, (v)-anions		d) (i)-solvent, (ii)-nickel, (iii)-anode, (iv)-cathode, (v)-cations

Q.3	Which of the following statement is/are false? Cellulose is made up of glucose units. Weaving and knitting are two processes to get plastic. Plastics get corroded easily. Plastics are not polymers.
	a) Only 1		b) 2 and 3
	c) 1 and 3		d) 2, 3 and 4

Q.4	In the following question, an assertion and a reason are given. Choose the correct option: Assertion: Sound waves cannot pass through the vacuum. Reason: Sound waves are mechanical waves, which require a medium for their propagation.
	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.5	Consider the following statements about the placenta and choose the correct option: (i) It is an intimate connection between fetal membrane and uterine wall. (ii) Fetal blood comes very close to the maternal blood in the placenta. (iii) Fetus gets nutrients, oxygen, etc. from the maternal blood through the placenta and gives off wastes, CO2 etc.
	a) Only (ii) correct		b) Only (i) and (ii) are correct
	c) Only (iii) is correct		d) All of them are correct

Q.6	Which of the following can change its shape? I. Amoeba II. Neuron III. WBC
	a) I only		b) I and II
	c) I and III		d) I, II, III

Q.7	Which among the following salts produces maximum number of metal ions per molecule when dissolved in a suitable solvent?
	a) Aluminium phosphate, AlPO4		b) Magnesium phosphate, Mg3(PO4)2
	c) Sodium biphosphate, Na2HPO4		d) Aluminium dihydrogen phosphate, Al(H2PO4)3

Q.8	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

Q.9	The speed of sound in air and sea-water are given to be 340 m/s and 1440 m/s respectively. A ship sends a strong signal straight down and detects its echo after 1.5 secs. What is the depth of the sea at that point?
	a) 2.16 km		b) 1.08 km
	c) 0.51 km		d) 0.255 km

Q.10	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.

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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.