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
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
Different microorganisms taking part in the nitrogen cycle are: (i) Rhizobium in roots (ii) Ammonifying bacteria (iii) Nitrifying bacteria (iv) Denitrifying bacteria Which of them strictly work under anaerobic conditions?
Q.3
Match the column I with column II:
Column I
Column II
1.
Dispersion
a.
Mirage
2.
Scattering
b.
Pin hole camera
3.
Total internal reflection
c.
Red light used as traffic signal
4.
Rectilinear propagation
d.
Rainbow
Q.4
Which of the following statement(s) is not correct?
Q.5
When the angle between two plane mirrors is 60o, how many multiple images will be formed by the mirrors?
Q.6
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.7
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.8
Fill in the blank:
For showing the full image of an object, the size of the plane mirror should be at least ____________.
Q.9
Select the incorrect statement:
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?
Answers to Previous Year Questions from CREST Olympiads:
Q.1
c
Q.2
a
Q.3
b
Q.4
a
Q.5
a
Q.6
b
Q.7
b
Q.8
b
Q.9
a
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 : c | Q.2 : a | Q.3 : b | Q.4 : a | Q.5 : a | Q.6 : b | Q.7 : b | Q.8 : b | Q.9 : a | Q.10 : d
