Category: Grade IX

Fertilizers Fertilizers are those substances by use of which we can increase the fertility of the soil. Organic Fertilizer: Organic...

Chemical Reaction Matter: The Various substances around us, which have weight and volume are called matters. Glass, Plastic, Air, Iron,...

Solubility • A mixture is defined as a mass obtained by mixing up two or more chemically non-reactive substances in...

Work, Energy & Power • Work: The product of force acting on a body and displacement of a body in...

Metals • Reaction with oxygen: When metal is treated with oxygen on heating they react together to give basic oxides....

Measurement Those physical quantities, which can neither be derived from others nor be further resolved into simpler quantities, are called...

Force is an external agent, which changes or tends to change the state, shape, acceleration or direction of motion of...

Machine • The device or instruments, which make our work easier, faster and convenient are called simple machines. Lever, Wheel...