CREST Science Olympiad Class 8 Previous Year Paper

Is your child preparing for the Class 8 Science Olympiad? One of the most effective ways to boost their preparation is by solving previous year question papers. These papers help students get familiar with the exam format and the types of questions they can expect.

Why Use Previous Year Papers?

• They include questions from key topics such as Crop Production and Management, Microorganisms, Synthetic Fibres and Plastics, Metals and Non-metals etc.
• They help students improve their accuracy, speed, and critical thinking skills.
• Answer keys are provided for self-evaluation and better understanding of concepts.

Download the Science Olympiad Previous Year Paper for Class 8 (PDF) to help your child revise more effectively and approach the exam with greater confidence.

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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

Previous Year Questions

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Q.10

Q.1	Read the following questions and choose the correct option: (i) Under similar conditions, in which of the following gases will the speed of sound be the least? (ii) The velocity of sound in a gas is 4 times that in the air at the same temperature. When a tuning fork is sounded in air a wave of frequency 480 Hz and wavelength λ1 is produced. The same fork is sounded in the gas and if λ2 is the wavelength of the wave, Find λ2/ λ1.
	a) (i)-Nitrogen, (ii)-2		b) (i)-Oxygen, (ii)-4
	c) (i)-Carbon dioxide, (ii)-1/2		d) (i)-Sulphur dioxide, (ii)-4

Q.2	A man is standing not exactly at the centre of two walls. He fires a gun and hears the first echo after 1 s and the second echo after 2 s. If the speed of the sound is 330 m/s. What is the distance between the walls?
	a) 330 m		b) 360 m
	c) 420 m		d) 495 m

Q.3	Consider the following clues about an element 'X': Clue 1: X is soft and can be cut easily with a knife. Clue 2: It is very reactive and cannot be kept open in the air. Clue 3: It reacts vigorously with water.  Identify 'X':
	a) Magnesium		b) Potassium
	c) Phosphorus		d) Aluminium

Q.4	The speed of sound in air and sea-water are given to be 340 m/s and 1440 m/s respectively. A ship sends a strong signal straight down and detects its echo after 1.5 secs. What is the depth of the sea at that point?
	a) 2.16 km		b) 1.08 km
	c) 0.51 km		d) 0.255 km

Q.5	What happens when two bodies are rubbed against each other?
	a) They acquire equal and similar charges.		b) They acquire equal and opposite charges.
	c) They acquire different charges but in different amounts depending upon their masses.		d) They do not acquire any charge.

Q.6	Which of the following is/are a nitrifying bacterium? Nitrosomonas  Pseudomonas Nitrobacter Lactobacillus
	a) Only 1		b) Both 1 and 4
	c) Both 2 and 4		d) Both 1 and 3

Q.7	Which of the following is an incorrect statement?
	a) Velocity of sound is least in solids.		b) When sound travels through air, the temperature of air is constant.
	c) When sound travels through air, the air molecules vibrate longitudinally.		d) Under similar conditions of temperature and pressure, the velocity of sound is greater than that in oxygen.

Q.8	Choose the correct option and complete the following sentence: When the distance between the object and the plane mirror increases ______________.
	a) the image remains same		b) the size of the image will become less than the size of the object
	c) the distance between the image and the plane mirror increases		d) the distance between the image and the plane mirror decreases

Q.9	In the following question, an assertion and the reason are given. Choose the correct option: Assertion: When visible light is passed through a prism, violet colour is seen at the bottom of the screen. Reason: Prism has the highest refractive index for violet light.
	a) Assertion and the reason are true and reason is the correct explanation of the assertion		b) Assertion and the reason are true, but reason is not the correct explanation of the assertion
	c) Assertion is true but reason is false		d) Both assertion and reason are false

Q.10	A book rests on a horizontal frictionless surface. A horizontal force of magnitude F is applied. This force produces an acceleration:
	a) Only if F is larger than the weight of the book		b) Only while the book suddenly changes from rest to motion
	c) Always		d) Only if the inertia of the book decreases

Your Score: 0/10

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.