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	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.2	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.3	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.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	Ron placed an object at a distance 2 m from a plane mirror. He then shifted the object 0.5 m away from the mirror. What is the distance between the object and its image?
	a) 2 m		b) 1.5 m
	c) 5 m		d) 3 m

Q.6	In the given question, an assertion and a reason are given. Choose the correct option: Assertion: The temperature increases inside the fractionating column on going from the bottom to the top. Reason: The column is not heated at the bottom.
	a) Both assertion and reason are true and reason is the correct explanation of assertion.		b) Both assertion and reason are true, but reason is not the correct explanation of the assertion.
	c) Assertion is correct, but reason is incorrect.		d) Both assertion and reason are incorrect.

Q.7	Why is just one side of the Moon visible from Earth?
	a) The Moon does not rotate on its axis as it orbits Earth.		b) The Moon rotates on its axis at the same rate that the Moon orbits the Earth.
	c) Half of the Moon is always unlit by the Sun.		d) Half of the Moon does not reflect light.

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	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.10	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

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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.