Science

Question: What are the ‘building blocks of life’? Why are they so called? Answer: All living things are made up of one or more cells. For this reason, cells are known as the building blocks of life. Question: What is cytoplasm? Answer: The cytoplasm is a jelly-like substance that makes up most …

NCERT 8th Class (CBSE) Science: Friction – Quiz 33 Multiple Choice Questions related to NCERT 8th Class (CBSE) Science: Friction – Quiz: Friction is a force that slows things down or prevents things from moving. Friction occurs due to interlocking of irregularities in the surfaces. Friction is necessary evil as several …

NCERT 8th Class (CBSE) Science: Metals and Non-Metals – Quiz 31 Multiple Choice Questions related to NCERT 8th Class (CBSE) Science: Metals and Non-Metals – Quiz: Elements can be classified into metals and non-metals depending on their physical and chemical properties. The ore of a metal consists of rocks containing minerals of …

Question: Differentiate between metal and non metals on the basis of their physical properties? Answer: The difference is as follows: Question: What is the difference between physical state of metals and non-metals at room temperature? Answer: The physical state of metal and non-metal at room temperature: Metal are solid at room …

Question: Define force. Answer: Any push or pull is called force. Question: When does a body move? Answer: A body moves when force is applied. Question: What is the first requirement to put force into play? Answer: Interaction between two objects. Question: Give any example of push. Answer: Pushing a table …

NCERT 8th Class (CBSE) Science: Force and Pressure – Quiz 40 Multiple Choice Questions related to NCERT 8th Class (CBSE) Science: Force and Pressure – Quiz: Every push or pull is called force. Force comes into action when an object interacts with other object. Force has magnitude and direction.

NCERT 8th Class (CBSE) Science: Synthetic Fibres and Plastics – Quiz 25 Multiple Choice Questions related to NCERT 8th Class (CBSE) Science: Synthetic Fibres and Plastics – Quiz: Human-made materials are obtained from natural raw materials by chemical processes. Polymers are materials with long chain molecules containing thousands of smaller molecules …

Question: Give two examples each of natural and synthetic fibres. Answer: Natural fibres: Cotton, Silk Synthetic fibres: Rayon, Nylon Question: What is a polymer? Answer: Synthetic fibres are made up of molecules called polymers. Polymers are huge molecules-usually consisting of long chains made from thousand of similar small molecules called monomers. …

NCERT 8th Class (CBSE) Science: Microorganisms – Quiz 24 Multiple Choice Questions related to NCERT 8th Class (CBSE) Science: Microorganisms – Quiz: Organisms that are small and can be seen only through a microscope are called microorganisms or microbes. They are present all round us and also inside our bodies. Microorganisms belong …

Question: What is a microorganism? Answer: Organisms that are so small that they can only be seen through a microscope, are called microorganisms or microbes. Question: Name the five groups into which microorganisms are divided. Which of these have only unicellular organisms? Answer:  There are five major groups of microorganisms. …