Class 8 Science – Microorganisms: Friend and Foe 1. Introduction Microorganisms (microbes) are tiny living organisms not visible to the eye. Found everywhere: air, water, soil, humans,...
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...
Class 8 Science – Sound: Production and Propagation 1. Introduction Sound is a form of energy that produces a sensation of hearing. It is produced when an object vibrates and creates...
1. Introduction Rational numbers are numbers that can be expressed as the ratio of two integers, where the denominator is not zero. Examples: numbers like 1/2, -3/4, 5, 0. 2. Properties...