Questions created by CREST students. Answer them and earn Practice PointsHow to earn pointsAsk a question+3Answer a question+1Someone answers yours+1Your Q gets upvoted+1Pioneer bonus (first 5)+5! Rules for asking and answering
Class 8 Science questions written by CREST students for other students, as practice for the CREST Science Olympiad (CSO). Each question belongs to one of the Class 8 Science topics: Crop Production and Management, Microorganisms, Synthetic Fibres and Plastics, Metals and Non-metals, Coal and Petroleum, Combustion and Flame and 12 more.
There are 200 questions so far, newest first. Choose an answer and you see at once whether it is right, with the explanation the student gave. For the real exam pattern, try the Class 8 sample paper and the Class 8 previous year paper, and check the CSO syllabus.
Showing: Class 8 / Science (200 questions)
Why are the walls of a dam made thicker at the bottom than at the top?
Where does a liquid exert pressure when stored in a container?
How does the pressure exerted by a liquid change with depth?
Why do porters place a round piece of cloth on their heads when carrying heavy loads?
Why is it easier to cut vegetables with a sharp knife than a blunt knife?
If the area over which a constant force acts is decreased, what happens to the pressure?
Which instrument is commonly used to measure the magnitude of a force?
When a batsman hits a moving cricket ball, which effect of force is primarily observed?
What is the measure of the gravitational force acting on an object called?
Which force always opposes the motion of one surface over another?
What type of force causes a plastic comb rubbed on dry hair to attract small pieces of paper?
Multiple-choice questions that CREST students write for other Class 8 students, on topics such as Crop Production and Management, Microorganisms, Synthetic Fibres and Plastics. Anyone can answer them free; the student who wrote the question adds the correct option and an explanation.
Logged-in students earn +1 for answering a question, +3 for asking one, +1 each time someone answers their question and +1 for each upvote; they lose 1 for each downvote. The first five questions on a topic in a class earn a +5 Pioneer bonus. One point is worth a ₹1 discount on Additional Practice purchases. See the rules for asking and answering.
Student questions are good daily practice, but they are not an exam paper. For the real exam pattern, try the Class 8 sample paper and the Class 8 previous year paper, and check the CSO syllabus.
Any logged-in student can press Report on a question. Questions that break the rules, such as wrong answers, copied pictures or keyboard mashing, are taken off and the points they earned are taken back.