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
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 colour?
Q.2
Identify the group(s) which contain all synthetic substances:
P)
Nylon, Terylene, Wool
Q)
Acrylic, Silk, Wool
R)
Cotton, Polycot, Rayon
S)
PVC, Polythene, Bakelite
Q.3
A plastic comb is rubbed with dry hair whereas a glass rod is rubbed with a piece of silk cloth. Which of these will get positively charged?
A. Plastic comb B. Glass rod C. Dry hair D. Silk cloth
Q.4
What benefit does yeast gain from carrying out fermentation?
Q.5
In the given question, an assertion and a reason are given. Choose the correct option:
Assertion: The temperature increases inside the fractionating column on going from the bottom to the top.
Reason: The column is not heated at the bottom.
Q.6
An elephant has a mass of 3000 kg. Each of its foot has a surface area of 0.4 m2. A lady of mass 45 kg wears stiletto shoes. Each of the stiletto heels has a surface area of 0.01 m2. Assuming there is the equal distribution of mass on each foot. Calculate the maximum possible pressure that could be exerted by a stiletto heel worn by the lady:
Q.7
Select the incorrect statement:
Q.8
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.9
Fill in the blank:
To a small quantity of X, few drops of HCl are added. Consequently, colourless, odourless gas is produced. This gas on passing through lime water turns it milky proving the presence of ____________ of X.
Q.10
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?
Your Score: 0/10
Answers to Sample Questions from CREST Olympiads:
Q.1
b
Q.2
c
Q.3
b
Q.4
b
Q.5
d
Q.6
b
Q.7
a
Q.8
c
Q.9
d
Q.10
d
Are you a student who is participating this time in the CREST Science Olympiad? Science Olympiad previous years’ question papers for class 8 is one of the best ways to summarise your months of Olympiad exam preparation. Students can use these sample papers to assess what they've studied for the exam. It acts as a mirror, reflecting candidates' weak and strong points. Students can download the Science Olympiad sample papers for class 8 for free on this page. Get a hold of these.
Science Olympiad questions have numerous advantages. It gives an indication of the types of questions that will be asked in the actual exam. Always remember to include sample papers practice in your Olympiad exam preparation guide.
Answers to Sample Questions from CREST Olympiads:
Q.1 : b | Q.2 : c | Q.3 : b | Q.4 : b | Q.5 : d | Q.6 : b | Q.7 : a | Q.8 : c | Q.9 : d | Q.10 : d
