CBSE Class 9 Science Chapter 5 The Fundamental Unit of Life The Fundamental Unit of Life Class 9 Notes Understanding the Lesson 1. Robert Hooke: In 1665, he discovered cell in a thin slice of cork (bark of cork tree) by using a self designed microscope. The structure consisted of many little compartments which resembled…
Read more
CBSE Class 9 Science Chapter 4 Notes Structure of the Atom Structure of the Atom Class 9 Notes Understanding the Lesson 1. Discovery of electron: Study of cathode rays. On electrical discharge through gases at very low pressure, cathode rays are produced. Cathode rays move in straight line. Cathode rays have some mechanical energy. Cathode…
Read more
CBSE Class 9 Science Chapter 3 Notes Atoms and Molecules Atoms and Molecules Class 9 Notes Understanding the Lesson 1. The structure of matter has been a subject of speculation from a very early time. The ancient Indian and Greek philosophers regarded matter to be discontinuous and made up of infinitely small particles. Around the…
Read more
CBSE Class 9 Science Chapter 2 Notes Is Matter Around Us Pure Is Matter Around Us Pure Class 9 Notes Understanding the Lesson 1. Pure substance: A pure substance is defined as a material which contains only one kind of atoms or molecules. In pure substance all the constituting particles have the same chemical nature.…
Read more
CBSE Class 9 Science Chapter 1 Notes Matter in Our Surroundings Matter in Our Surroundings Class 9 Notes Understanding the Lesson 1. Matter is everything around you. Everything in this universe is made up of material which in scientific term is called matter. 2. Matter can be defined as anything that occupies space possesses mass,…
Read more
Class 9 Science Notes | NCERT Class 9 Science Revision Notes CBSE Class 9 Science Notes Matter in Our Surroundings Class 9 Notes Is Matter Around Us Pure Class 9 Notes Atoms and Molecules Class 9 Notes Structure of the Atom Class 9 Notes The Fundamental Unit of Life Class 9 Notes Tissues Class 9 Notes Diversity in Living Organisms Class 9…
Read more