CREST Science Olympiad Class 8 Previous Year Papers

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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 Q.2 Q.3 Q.4 Q.5 Q.6 Q.7 Q.8 Q.9 Q.10

Q.1

Fill in the blank:

For showing the full image of an object, the size of the plane mirror should be at least ____________.

Q.2

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.3

Why is just one side of the Moon visible from Earth?

Q.4

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.5

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.6

Choose the correct option and complete the following sentence:

The formation of sulphur trioxide from sulphur dioxide and oxygen is an ____________ reaction.

Q.7

In heavy vehicles, diesel is used as a fuel. Which of the following could be the reason for this?

Q.8

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.9

When the angle between two plane mirrors is 60o, how many multiple images will be formed by the mirrors?



Q.10

Consider the following statements and choose the correct option:

Statement 1: The ignition temperature of white phosphorus is nearly equivalent to the temperature of the earth.

Statement 2: Combustion of fuel by motor vehicles is an example of spontaneous combustion.

Your Score: 0/10

Answers to Previous Year Questions from CREST Olympiads:

Q.1bQ.2bQ.3bQ.4bQ.5aQ.6cQ.7cQ.8bQ.9aQ.10d

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 -

  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.

Answers to Previous Year Questions from CREST Olympiads:

Q.1 : b | Q.2 : b | Q.3 : b | Q.4 : b | Q.5 : a | Q.6 : c | Q.7 : c | Q.8 : b | Q.9 : a | Q.10 : d

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