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[…]
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,[…]
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[…]
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[…]
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[…]
