CBSE Class 9 Science Notes – Chapter 12 : Improvement In Food Resources
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 to an increased use of […]
CBSE Class 9 Science Notes – Chapter 11 : Sound
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, and state (solid, liquid, or […]
CBSE Class 9 Science Notes – Chapter 10 : Work And Energy
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 object or body by virtue […]
CBSE Class 9 Science Notes – Chapter 9 : Gravitation
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 to gravity v = u […]
CBSE Class 9 Science Notes – Chapter 8 : Forces And Laws Of Motion
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 experienced by bodies even without […]
CBSE Class 9 Science Notes – Chapter 7 : Motion
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 an external force acts on […]
CBSE Class 9 Science Notes – Chapter 6 : Tissues
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 capable of divisions) Permanent Tissue(Mature […]
CBSE Class 9 Science Notes – Chapter 5 : The Fundamental Unit of Life
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 of organisms on basis of […]
CBSE Class 9 Science Notes – Chapter 4 : Structure Of Atom
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 of atom is called electron. […]
CBSE Class 9 Science Notes – Chapter 3 : Atoms And Molecules
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 created nor destroyed in a […]
