Class 8 Sound Notes Sound:- Sound is a form of energy which produces a sensation of hearing in our ears. Vibration:- A kind of rapid to and fro motion of an object is called vibration. Sound is produced by vibrating objects. This motion is also known as Oscillatory motion. Voice Box :- Upper end of […]
Class 8 Reaching the Age of Adolescence Notes Adolescence :- The period of life, when the body undergoes changes, leading to reproductive maturity, is called adolescence. Adolescence begins around the age of 11 and lasts upto 18 or 19 years of age. Since this period covers the ‘teens’ (13 to18 or 19 years of age), […]
Reproduction In Animals Notes Reproduction :- Reproduction is the ability of the living organism to produce young ones of their own kind. Modes of Reproduction :- Asexual Reproduction Sexual Reproduction Sexual Reproduction :- The type of reproduction in which male and female Parents involved to give rise to an offspring is called sexual reproduction. Male […]
Download NCERT Science, Maths, Social Science (Geography, History, Political Science, Economics) books chapterwise of class 8 in pdf form for free. NCERT Books Class 9 NCERT Books Class 10
Download NCERT class 8 Maths book in PDF form for free.
Download NCERT class 8 Science book Chapter-wise in PDF form for free.
Class 8 Light Notes Light:- Light is a form of energy that produces sensation of vision in our eyes. Reflection of Light:- The phenomenon of bouncing back of a ray of light after striking on a highly polished (reflecting) surface is called reflection of light. Incident ray:- The light ray, which strikes any surface, is […]
Cell – Structure and Functions Notes Cell:- The cell is the basic structural and functional unit of our life. Cell was discovered by Robert Hooke in 1665. Different cells have different shapes like round, spherical, elongated, spindle (long and pointed at both ends) depending on their specific functions. Some cells have changing shape like amoeba and white blood […]
Coal and Petroleum Notes Natural Resources:– The resources, that are obtained from nature are called natural resources.Ex:- air, water, soil and minerals. Types of Natural resources:- Inexhaustible/ Renewable Natural Resources:- The resources which are present in unlimited quantity in nature and are not likely to be exhausted by human activities are called inexhaustible natural resources. […]