Class 8 Science – Combustion and Flame 1. Introduction Combustion is the process in which a substance reacts with oxygen to release heat and light. Most fuels undergo combustion to provide...
1. Introduction Square of a number: The product of a number multiplied by itself. Square root of a number: The value which, when multiplied by itself, gives the original number. Key Concept: Squaring...
Class 8 Science – Coal and Petroleum: Fossil Fuels 1. Introduction Fossil fuels are non-renewable energy sources formed from the remains of ancient plants and animals over millions of years. Main...
Class 8 Mathematics – Quadrilaterals 1. Introduction A quadrilateral is a polygon with four sides and four angles. The sum of all interior angles of a quadrilateral is always 360°. Quadrilaterals...