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
Read the following statements and choose the correct option:
Statement 1: The antibiotic penicillin inhibits the growth of bacteria by blocking the process which helps to build its cell membrane.
Statement 2: The cell membrane is selectively permeable because it allows the movement of certain molecules in and out of the cell while the movement of other molecules is prevented.
Q.2
Four students made the following statements about the metals:
Robert: Metals are malleable.
Arya: All metal oxides are acidic in nature.
James: Metals have lustre.
Peter: Metal atoms have 1, 2 or 3 electrons in the outermost shell.
Which among them spoke incorrectly?
Q.3
Arrange the different types of coal in the decreasing order of the quality of coal:
Susan was walking on ice, her mother advised her to take smaller steps to avoid slipping. Which of the following could be the reason for the smaller steps?
Q.5
What happens when an impure copper rod is taken as the anode and the pure copper rod is taken as the cathode in an electrolysis experiment?
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
The diagram shows the process of purification of copper metal. A thick copper plate A of impure copper and a thin pure copper plate B are immersed in a metal sulphate solution and an electric current is passed through it. 1. Which metal solution is taken as electrolyte? 2. Which electrode is connected to the positive terminal of the battery?
Q.8
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.9
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.10
Choose the correct option and complete the following sentence:
A lightning conductor installed in a building ________________.
Answers to Previous Year Questions from CREST Olympiads:
Q.1
b
Q.2
b
Q.3
a
Q.4
c
Q.5
b
Q.6
b
Q.7
a
Q.8
b
Q.9
c
Q.10
d
Students can download the CREST Science Olympiad previous year paper pdf for class 8 from this page. Each question in the paper carries 1 mark. The answer key for all the questions is also provided on the last page.
One of the most significant advantages of solving the past years’ papers is that it helps students improve their time management skills, strengthens their understanding of concepts and aids them in applying the concepts they have mastered. Also, solving previous years’ papers a few days before the exam can help students to revise the concepts quickly. Therefore, students must refer to previous years' papers before appearing for the final exam as many advantages are associated with it.
Additional Preparation Resources
Students can also refer to the following resources to level up their CREST Science Olympiad (CSO) exam preparation for class 8 -
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
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.
Answers to Previous Year Questions from CREST Olympiads:
Q.1 : b | Q.2 : b | Q.3 : a | Q.4 : c | Q.5 : b | Q.6 : b | Q.7 : a | Q.8 : b | Q.9 : c | Q.10 : d
