CREST Science Olympiad Class 10 Previous Year Papers

>>> Join CREST Olympiads WhatsApp Channel for latest updates. CREST Science Olympiad Previous Year Paper PDF for Class 10:

If your web browser doesn't have a PDF Plugin. Instead you can Click here to download the PDF

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

Q.1

Q.2

Q.3

Q.4

Q.5

Q.6

Q.7

Q.8

Q.9

Q.10

Q.1	When a person walking in bright sunlight enters a dark room, he is not able to see clearly for a little while. Identify the correct reason for the above statement:
	a) It is because the eye muscles cannot immediately adjust the focal length of the eye lens.		b) It is because the retina retains the bright image for some time and becomes momentarily insensitive.
	c) It is because the iris is unable to contract the pupil immediately.		d) It is because the iris is unable to dilate the pupil immediately.

Q.2	What volume of hydrogen gas at 273 K and 1 atm pressure will be consumed in obtaining 21.6 g of boron (At. mass: 10.8) from the reduction of BCl3 by hydrogen?
	a) 22.4 L		b) 44.8 L
	c) 67.2 L		d) 89.6 L

Q.3	Label A, B, C and D in the following diagram:
	a) A-Chloroplast, B-Guard cell, C-Air spaces, D-Upper epidermis		b) A-Air spaces, B-Guard cell, C-Chloroplast, D-Epidermis
	c) A-Guard cells, B-Air spaces, C-Chloroplast, D-Upper epidermis		d) A-Epidermis, B-Guard cells, C-Air spaces, D-Chloroplast

Q.4	In the following question, an assertion and a reason are given. Choose the correct option: Assertion (A): In any food chain, the number of organisms in any trophic level should always be less than that in its previous trophic level. Reason (R): Only 10 percent of total energy present in a trophic level is transferred to the next trophic level in any food chain.
	a) Both A and R are true and R is the correct explanation for A		b) Both A and R are true, but R is not the correct explanation for A
	c) A is true and R is false		d) A is false and R is true

Q.5	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.6	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.

Q.7	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.8	Identify the phenomenon by which a new set of the population is formed from the change in the frequency of some genes:
	a) Genetic drift		b) Organic evolution
	c) Variations		d) Speciation

Q.9	Fill in the blank: An electric current through a horizontal metal wire flows in East to West direction, the direction of the magnetic field at a point directly above it is from ___________.
	a) East to West		b) West to East
	c) North to South		d) South to North

Q.10	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

Your Score: 0/10

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.