CREST Science Olympiad Class 9 Previous Year Paper

Preparing for the Class 9 Science Olympiad can feel challenging, but using previous year question papers makes a big difference. These papers give students a solid understanding of how questions are framed and what topics to focus on, making revision more targeted.

How These Papers Help

• They cover crucial topics such as Motion, Force and Laws of Motion, Gravitation, Work and Energy, Sound etc.
• They improve time management, analytical thinking, and help students handle tricky questions more confidently.
• Answer keys are included to help students review and strengthen weak areas.

Download the Science Olympiad Previous Year Paper for Class 9 (PDF) to support focused revision and help your child step into the exam feeling well-prepared and motivated.

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Syllabus:

Section 1: Motion, Force and Laws of Motion, Gravitation, Work and Energy, Sound, Matter in Our Surroundings, Is Matter Around Us Pure, Atoms and Molecules, Structure of Atom, Cell - The Fundamental Unit of Life, Tissues, Diversity in Living Organisms, Why Do We Fall Ill, Natural Resources, Improvement in Food Resources.

Achievers Section: Higher Order Thinking Questions - Syllabus as per Section 1

Sample Paper Previous Year Paper Marking Scheme Free Study Material

Previous Year Questions

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Q.1	Select the correct reason for the given statement: Algae and other submerged green plants often float in water during daytime and sink at night.
	a) They lose weight at night because fish and other animals eat away at their parts.		b) They become buoyant due to accumulation of oxygen as a result of photosynthesis.
	c) They become light due to consumption of food.		d) The come up to enjoy sunlight.

Q.2	If different planets have the same density but different radii, then the acceleration due to gravity on the surface of the planet is related to the radius (R) of the planet as:
	a) g ∝ 1/R2		b) g ∝ 1/R
	c) g ∝ R		d) g ∝ R2

Q.3	Which of the following is the basic objective of the pulse polio immunisation programme? To immunise those children who are not earlier immunised or are partially immunised. To boost the immunity of children already immunised. To eradicate the polio-causing virus from the world.
	a) Only 1		b) Only 2
	c) Only 3		d) 1, 2 and 3

Q.4	An element X has two isotopes which may be represented as 238X and 235X. How does 238differ from 235X?
	a) It has 3 more protons and 3 more electrons.		b) It has 3 more protons but no more electrons.
	c) It has 3 more neutrons and 3 more electrons.		d) It has 3 more neutrons, but no more electrons.

Q.5	Choose the correct option: The molecular formula Al2O3 means that ________________.
	a) a molecule contains 2 atoms of Al and 3 atoms of O		b) the ratio of the mass of Al to the mass of O in the molecule is 2 : 3
	c) they are twice as many Al atoms in the molecule as there are O atoms		d) the ratio of the mass of Al to the mass of O in the molecule is 3 : 2

Q.6	Consider the following statements and choose the correct option: Statement 1: The number of molecules present in 2.8 g of nitrogen is 6.023 x 1022. Statement 2: Both 44 g CO2 and 16 g CH4 have the same number of carbon atoms.
	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.7	A car travels with a constant speed of 50 km/hr for 30 min and then quickly speed up to 100 km/hr to be maintained for 60 min. Calculate its average speed in m/s:
	a) 83.33		b) 43.33
	c) 23.14		d) 40.90

Q.8	Choose the wrong statement:
	a) The accelerated motion may be due to change in the magnitude of velocity or direction of velocity or both.		b) The velocity and acceleration of a body may not necessarily be in the same direction.
	c) The velocity and acceleration of a body may not be zero simultaneously.		d) When a body falls freely under the action of gravity, its acceleration is zero.

Q.9	Which of the following maintains the organic matter of the soil?
	a) Fungi and semi-parasites		b) Cyanobacteria and parasitic animals
	c) Bacteria and fungi		d) All of these

Q.10	In which of the following pairs of the ions/atoms are isoelectronic with each other? I. Na+ and Ne II. Na+ and K+ III. K+ and Cl-
	a) I and II		b) I and III
	c) II and III		d) All of the above

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Additional Preparation Resources

Students can also refer to the following resources to level up their CREST Science Olympiad (CSO) exam preparation for class 9 -

1. CREST Science Worksheets Package for class 9 - 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 9 - 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 9 for free.

Note: Don’t forget to download the CREST Science Olympiad past year paper pdf for class 9.