Posts in CBSE Class 9

Food Sources Need For Efficiency Of Crops And Livestock Efforts Made To Meet The Increase In Food Demands The introduction of these revolutions has led[…]

Speed Of Sound The speed of sound depends on the medium through which it travels and the conditions of that medium, particularly its temperature, density,[…]

Work Energy Various Forms of Energy Potential Energy (PE) Kinetic Energy Energy possessed by an object by virtue of its position/configuration Energy possessed by an[…]

Gravitation Force between two objects or bodies which attract each other due to their masses Effects of Gravity Free fall Equation of Motion Acceleration due[…]

Force Types of Force Contact Non Contact The forces which act on bodies when they are in physical contact are called contact force. The forces[…]

Motion: Moving Of Body/object Newton’s First Law of Mot ion Body continues its state of rest or of uniform motion in a straight line unless[…]

A group of cells that are similar in structure and/or work together to achieve a particular function forms a tissue. Plant Tissues Meristematic Tissue(Immature cells[…]

1. Cell Smallest structural and functional unit of life. Discovery of cell and its components Cell theory Types of cells on basis of organization Types[…]

Charged Particle In Matter Electron Proton Neutron Negatively charged sub-particles of atom is called electron. Positively charged sub-particles of atom is called proton. Neutral sub-particles[…]

Laws Of Chemical Combination Antoine L. Lavoisier give two important laws of chemical combination. Law of Conservation of Mass: It states that mass can neither be[…]