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	When a ray of light strikes a plane mirror at an angle of 15o with the mirror, what will be the angle of reflection of the ray?
	a) 15o		b) 30o
	c) 75o		d) 85o

Q.2	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 metal solution is taken as electrolyte? 2. Which electrode is connected to the positive terminal of the battery?
	a) 1-Copper sulphate solution 2-The thick plate of impure copper (Anode)		b) 1-Iron sulphate solution 2-The thick plate of impure copper (Cathode)
	c) 1-Copper sulphate solution 2-The thin plate of pure copper (Anode)		d) 1-Iron sulphate solution 2-The thin plate of pure copper (Cathode)

Q.3	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.4	Fill in the blank: A duster rests on a table, exerting a downward force on the table. The reaction to this force is _____________.
	a) the force of Earth on the duster		b) the force of the table on the duster
	c) the force of Earth on the table		d) the inertia of the duster

Q.5	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.6	Match the column I with column II: Column I Column II 1.     Dispersion a.     Mirage 2.     Scattering b.     Pin hole camera 3.     Total internal reflection c.     Red light used as traffic signal 4.     Rectilinear propagation d.     Rainbow
	a) 1 – c, 2 – d, 3 – a, 4 – b		b) 1 – d, 2 – c, 3 – a, 4 – b
	c) 1 – a, 2 – c, 3 – b, 4 – d		d) 1 – d, 2 – a, 3 – c, 4 – a

Q.7	Consider the following statements about the physical and chemical properties of metals and choose the correct option: 1. All metals are ductile. 2. Generally metals are ductile. 3. Metals which are more reactive than hydrogen react with acids to release hydrogen gas. 4. All metals react with acids to release hydrogen gas.
	a) Only 1 and 2 are correct		b) Only 2 and 3 are correct
	c) 1, 2 and 3 correct		d) 1, 2, 3 and 4 are correct

Q.8	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.9	Choose the correct option and complete the following sentence: A lightning conductor installed in a building ________________.
	a) does not allow the lightning to fall on the building		b) repels the lightning
	c) forces the lightning to fall in an area where there are no buildings		d) conducts electric charge to the ground when lightning strikes the building

Q.10	Which of the following shows the correct sequence (in the increasing order) of heat energy received per unit area from the Sun measured on Earth, Mars and Jupiter?
	a) Jupiter > Mars > Earth		b) Earth > Mars > Jupiter
	c) Jupiter > Earth > Mars		d) Earth > Jupiter > Mars

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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.