CREST Science Olympiad Class 10 Previous Year Papers

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Syllabus:

Section 1: Chemical Reactions and Equations, Acids, Bases and Salts, Metals and Non-metals, Carbon and its Compounds, Periodic Classification of Elements, Life Processes, Reproduction in Organisms, Heredity and Evolution, Light-Reflection and Refraction, Human Eye and Colourful World, Electricity, Magnetic Effects of Electric Current, Sources of Energy, Our Environment and its Management.

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.4

Q.5

Q.6

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Q.9

Q.10

Q.1	Length and diameters of four wires of same material are given below. The resistance of which of the following wires will be minimum?
	a) L and D		b) 2 L and D
	c) (L/2) and 2D		d) 2 L and (D/2)

Q.2	Which of the following statements correctly describes the concept of sustainable development? Planned growth with minimum damage to the environment Growth irrespective of the extent of damage caused to the environment Stopping all developmental work to conserve the environment Growth that is acceptable to all the stakeholders
	a) i and iv		b) ii and iii
	c) ii and iv		d) iii and iv

Q.3	Fill in the blank: When a ray of light falls on a transparent glass plate, a part of it is reflected and a part is refracted. The reflected and refracted rays can be perpendicular to each other for ____________.
	a) angle of incidence equal to 90o		b) angle of incidence equal to zero
	c) only one angle of incidence		d) more than one angle of incidence

Q.4	In the following question, an assertion and a reason are given. Choose the correct option: Assertion (A): A person, who has suffered from smallpox can be recommended for providing nursing care to the victims of smallpox than the person who hadn't suffered from smallpox. Reason (R): The immune system of the person who had suffered from smallpox remembers the microbes causing smallpox and responds vigorously on the next encounter.
	a) Both (A) and (R) are true and (R) is the correct explanation of (A)		b) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
	c) (A) is true, but (R) is false		d) Both (A) and (R) are false

Q.5	Olivia measured the focal length of a convex lens by focusing a parallel beam of yellow, violet and green colours at the principal axis. If fy, fv and fg are the respective focal lengths, then which among the following is the correct relation?
	a) fv = fy = fg		b) fv < fg < fy
	c) fv > fy > fg		d) fv > fg > fy

Q.6	Choose the correct option and complete the following sentence: An electric motor consists of ____________. I. rectangular coil of insulated copper wire II. two poles of a magnetic field III. split rings IV. conducting brushes
	a) I and II		b) I, II and III
	c) I, II, III and IV		d) None of these

Q.7	Fill in the blank: Bronze is often used to make statues and medals whereas brass is used in making utensils, scientific apparatus and cartridges. Both brass and bronze are copper-containing alloys, yet they differ in their chemical composition for additionally containing ___________.
	a) zinc in brass and tin in bronze		b) nickel in brass and tin in bronze
	c) chromium in brass and nickel in bronze		d) iron in brass and nickel in bronze

Q.8	Which of the following would stop evolution by natural selection from occurring?
	a) If humans became extinct because of an epidemic disease.		b) If a thermonuclear war killed most living organisms and changed the environment drastically.
	c) If ozone depletion led to increased ultraviolet radiation, which may cause many new mutations.		d) If all individuals in a population were genetically identical, and there was no genetic recombination, sexual reproduction, or mutation.

Q.9	When SO2 is passed through a solution of K2Cr2O7 turns green. Which of the following correctly shows the change in the oxidation state of chromium and sulphur?
	a) +3 to +6 and +4 to +2 respectively		b) +6 to +3 and +4 to +6 respectively
	c) +4 to +6 and +4 to -2 respectively		d) No change in 0 states

Q.10	Which of the following statements is correct regarding the grafting process?
	a) The rooted plant that is cut in a slanting manner is known as a scion.		b) The part of a stem that is cut in a slanting way is called stock.
	c) This is a natural method of vegetative reproduction.		d) Grafting is practised for mango and citrus plants.

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Students can find the most recent CREST Science Olympiad previous year paper pdf for class 10 on this page. The pdf is easily downloadable & answer key for all the questions is also provided on the last page.

CREST Science Olympiad previous year papers become quite useful while preparing for the CREST Science Olympiad exam. Below are some advantages of referring to the previous year papers -

1. Students get to understand the types of questions that come in the CREST Science Olympiad exam.
2. Practicing previous years’ papers help students to get to know their strengths and weaknesses.
3. Students become capable of effectively managing their time in the exam by practicing previous years' papers multiple times.

Additional Preparation Resources

Students can also refer to the following resources to level up their CREST Science Olympiad (CSO) exam preparation for class 10 -

1. CREST Science Worksheets Package for class 10 - 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 10 - 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 10 for free.

Note: Don’t forget to download the CREST Science Olympiad past year paper pdf for class 10.