﻿ Free Science Olympiad (CSO) Sample Paper for Class 8 (PDF)

# CREST Science Olympiad Class 8 Sample Paper

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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

 Q.1 In the following question, an assertion and a reason are given. Choose the correct option: Assertion: The forces acting on a body can be replaced by the resultant force only as regards the motion of the body as a whole. Reason: The resultant force cannot replace the several forces acting on a body in other respects.
 Q.2 A force of 16 N is distributed uniformly on one surface of a cube of edge 4 m. Find the pressure on this surface:
 Q.3 The sound produced by a tuning fork travel from air to glass. Which of the following physical quantities remains the same? Velocity Frequency Wavelength Amplitude
 Q.4 In the following question, an assertion and reason are given. Choose the correct option: Assertion: Fungi are a large group of organisms which do not photosynthesise.Reason: All fungi are generally made up of fine threads called hyphae.
 Q.5 Which of the following problem is not related to our environment?
 Q.6 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?
 Q.7 The pressure at a certain depth in river water is p1 and at the same depth the pressure in seawater is p2. Given that the density of seawater is greater than that of river water. Identify the correct relation between p1 and p2:
 Q.8 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.
 Q.9 James noticed that a flame produced by burning wood is orange-yellow, while a Bunsen burner flame is blue. What is the primary reason for this difference in flame color?
 Q.10 Choose the correct option and complete the following sentence: A lightning conductor installed in a building ________________.