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. …

Question: What do you understand by the term human settlement? How did settlements emerge? Answer: Human settlements refer to the locations where people build their homes. Around these settlements human communities develop. A community is a group of people living in a particular area and bound by a common culture …

NCERT 7th Class (CBSE) Social Science: The Atmosphere – Quiz 15 Multiple Choice Questions related to NCERT 7th Class (CBSE) Social Science: The Atmosphere – Quiz: The atmosphere regulates the temperature of the Earth, protects life from harmful rays from the Sun and also contains oxygen and moisture that are essential …

Question: Explain how the atmosphere sustain life on Earth. Answer: The atmosphere is vital for life on the Earth. It helps sustain life in various ways: The atmosphere acts as a blanket by trapping terrestrial radiation and keeping the warm. It ensures that there is the correct amount of heat …

Question: Which are the three main factors that influence atmospheric pressure? Answer: The main factors that influence air pressure are: Altitude: Air pressure is highest at mean sea level and decreases with increasing height. This happens because the atmosphere becomes thinner (less dense), in the upper atmospheric layers. Air temperature: Air …

NCERT 7th Class (CBSE) Social Science: Humidity and Rainfall – Quiz 20 Multiple Choice Questions related to NCERT 7th Class (CBSE) Social Science: Humidity and Rainfall – Quiz: The main factor that affects the humidity of air is temperature. When the temperature falls below the dew point, water vapour in …

Question: Distinguish between absolute humidity and relative humidity. In what units are they expressed? Answer: Absolute Humidity: This is the amount of water vapour present in a unit volume of air, and is expressed in kilograms per cubic meter. Relative Humidity: This is a measure of how dry or moist …

Question:Name the two regions of Rajasthan which are very hot. Answer: Jaisalmer and Bikaner. Question: Name the two regions of Jammu and Kashmir which are very cold or freezing cold. Answer: Drass and Kargil. Question: What are called bushes? Answer: Small plants are called bushes. Question: What is the special feature of mountain …