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

Q.1

Q.2

Q.3

Q.4

Q.5

Q.6

Q.7

Q.8

Q.9

Q.10

Q.1	Which of the following is correct definition of ignition temperature?
	a) The lowest temperature at which a substance catches fire spontaneously.		b) The lowest temperature at which a substance catches fire.
	c) The lowest temperature at which a substance changes its physical state.		d) The lowest temperature required for a chemical reaction to take place.

Q.2	A force of 16 N is distributed uniformly on one surface of a cube of edge 4 m. Find the pressure on this surface:
	a) 1 Pa		b) 2 Pa
	c) 1/2 Pa		d) 3 Pa

Q.3	James noticed that a flame produced by burning wood is orange-yellow, while a Bunsen burner flame is blue. What is the primary reason for this difference in flame colour?
	a) Wood releases different gases, causing a coloured flame.		b) The temperature of the flame determines its colour.
	c) The presence of impurities in wood affects the flame colour.		d) The combustion of different materials produces varying flame colours.

Q.4	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.5	Consider the following statements and choose the correct option: Statement 1: The ignition temperature of white phosphorus is nearly equivalent to the temperature of the earth. Statement 2: Combustion of fuel by motor vehicles is an example of spontaneous combustion.
	a) Statement 1 is correct and statement 2 is incorrect		b) Statement 1 is incorrect and statement 2 is correct
	c) Both the statements are correct		d) Both the statements are incorrect

Q.6	Different microorganisms taking part in the nitrogen cycle are: (i) Rhizobium in roots (ii) Ammonifying bacteria (iii) Nitrifying bacteria (iv) Denitrifying bacteria Which of them strictly work under anaerobic conditions?
	a) Only iv		b) i and iv
	c) i, ii and iv		d) ii and iv

Q.7	What happens when light emitted by a point source of light is passed through a prism?
	a) After dispersion, the emerging light would produce a pure spectrum on the screen.		b) After dispersion, the emerging light would produce an impure spectrum on the screen.
	c) After dispersion, the emerging light would produce a line spectrum on the screen.		d) None of these

Q.8	An elephant has a mass of 3000 kg. Each of its foot has a surface area of 0.4 m2. A lady of mass 45 kg wears stiletto shoes. Each of the stiletto heels has a surface area of 0.01 m2. Assuming there is the equal distribution of mass on each foot. Calculate the maximum possible pressure that could be exerted by a stiletto heel worn by the lady:
	a) 25500 Pa		b) 22500 Pa
	c) 52500 Pa		d) 20000 Pa

Q.9	Which of the following pairs cannot undergo displacement reaction?
	a) Iron sulphate solution and magnesium		b) Zinc sulphate solution and iron
	c) Zinc sulphate solution and calcium		d) Silver nitrate solution and copper

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.