CREST Science Olympiad Class 8 Sample Papers

Ace in Reasoning Olympiads!

Buy Workbook

Practice with topic-wise CREST Workbook

Become a science enthusiast!


Prepare for Science Olympiads with Olympiad Success Live Classes


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


Which of the following can lead to menstruation in a 21-year-old woman during ovulation?
A. Sperms not available for fertilisation
B. Oviducts blocked
C. Sperms available for fertilisation
D. Oviducts not blocked


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 form bottom to the top.

Reason: The column is not heated at the bottom.


Choose the correct option and complete the following sentence:

A lightning conductor installed in a building ________________.


In the given question, an assertion and reason are given. Choose the correct option:

Assertion: Animals like camels walk easily in deserts as broad feet exert less pressure on sandy ground.

Reason: Pressure decreases with an increase in surface area.


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?


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:


Four classmates were having a discussion about the correct way for sowing seeds. This is what they said:

Rahul: Seeds should be sown at right intervals.

Suresh: Seeds should be sown at the right depth.

Deepak: Seeds should be sown in dry soil.

Rajni: Seeds should not be sown in highly wet soil.

Which of them was/were incorrect?


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?


Which of the following organelle is only found in the plant cell, but not in the animal cell?


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.

Your Score: 0/10

Sample PDF of CREST Science Olympiad for Class 8:

If your web browser doesn't have a PDF Plugin. Instead you can Click here to download the PDF

Answers to Sample Questions from CREST Olympiads:


Answers to Sample Questions from CREST Olympiads:

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