Our Environment Previous Years Questions Choose the option giving correct matching the item given in Column I & II. a. A : (iii), B : (i), C : (iv), D : (ii)b. A : (iii), B : (iv), C : (i), D : (ii)c. A : (iii), B : (iv), C : (ii), D : […]
Life Processes Previous Years Questions : Solutions List the steps of preparation of temporary mount of a leaf peel to observe stomata. [CBSE 2018] [2Marks]Sol:The following steps of preparation of temporary mount of a leaf peel to observe stomata are : (i)Remove a healthy leaf from the plant.(ii)Remove a part of peel from the lower surface […]
Metals and Non-Metals Previous Years Questions : Solutions Show the formation of Na2O by the transfer of electrons. [CBSE 2019] [2 Marks]Sol: Show the formation of magnesium oxide by the transfer of electrons. [CBSE 2019] [2 Marks]Sol: What are ionic compounds ? Why do ionic compounds not conduct electricity in the solid state? [CBSE 2019] [2 Marks]Sol:The compound […]
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), […]
Class 8 Force And Pressure Notes Force :– A push or pull on an object is called force. S.I Unit = Newton Effects of Force :- Change in state of motion :- Change in the speed of an object. Change in its direction of motion. Change in shape and size of an object :- We […]
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 […]
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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 […]