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Written by admin on July 14th, 2013
Q 1: Name any three properties of synthetic fibres. A 1: Three properties of synthetic fibres are: -    Toughness: Clothes made from synthetic fibres are tough and can withstand a lot of force without getting broken. -    Light weight – Synthetic fibres weigh far less as compared to natural plastic materials such as ...
Written by admin on February 1st, 2013
Q 1: Define child. A 1: A young human being below the age of full physical development is called a child. Q 2: Define adult A 2: A mature human being who is fully grown and developed is called an adult. Q 3: What is adolescence? A 3: The transitional period of physical and mental ...
Written by admin on October 19th, 2012
Question 1: Explain the importance of reproduction in organisms. Reproduction is a biological process through which living organisms produce their offspring similar to themselves. Living organisms reproduce to maintain their number and for the continuation of their species. Thus, reproduction ensures the continuation of similar kinds of individuals. Question 2: Describe the ...
Written by admin on September 14th, 2012
Short type Questions with their Answers Q.1: Why rayon is completely synthetic fiber? A 1: Rayon is not completely synthetic fiber because it is not completely made of synthetic materials. It uses tree pulp as the raw material. Q.2: What is PET? A 2: PET is a form of polyester. It ...
Written by admin on September 10th, 2012
Question 1: What are the advantages of using CNG and LPG as fuels? Answer 1: The advantages of using Compressed Natural Gas (CNG) and Liquefied Petroleum Gas (LPG) as fuels are: (i) They can be burnt directly. (ii) They can be transported easily through pipe lines. (iii) They are clean fuels and do not ...
Written by admin on September 5th, 2012
Definition of Friction: The force which always opposes the motion of one object over another object incontact with it is called friction. In which direction Friction acts: The force of friction always acts in a direction opposite to the direction in which an object moves (or tends to move). Cause of friction: Friction ...
Written by admin on August 31st, 2012
What is Universe? The vast sky above us constitutes the universe. The stars, sun, planets all are constituents of the universe. Which is the brightest object in the night sky? The moon is the brightest object in the night sky. What are celestial objects? A natural object which is located outside of Earth's ...
Written by admin on August 31st, 2012
Q 1: What is pollution? A 1: The presence of unusually high concentrations of harmful or poisonous substances in the environment (air, water, etc.) is called pollution. Q 2: What is a pollutant?   A 2: An unwanted and harmful substance that contaminates the environment such as air and water is called ...
Written by admin on August 26th, 2012
Hi, I am setting up class8science.com with following objectives: Provide solutions to all the questions asked in NCERT class VIIIth book, i.e., Chapter Exercises. Provide notes of all the chapters of class 8th Science book of NCERT Provide sample test papers with ...
Written by admin on August 14th, 2012
Short type Questions with their Answers Q.1: Why does every living organism need food? A 1: Every living organism needs food to grow and perform various other activities and body functions. Q.2: Where do we get our food from? A 2: We get our food from plants and animals. Q.3: What is crop? A 3: When ...