Class IX

SURFACE AREAS AND VOLUMES CLASS 9

SURFACE AREAS AND VOLUMES  Introduction So far, in all our studies, we have been dealing with figures that can be easily drawn on our notebooks or blackboards. These are called plane figures. We have understood what rectangles, squares , and circles…

LINEAR EQUATIONS IN TWO VARIABLES Class 9

LINEAR EQUATIONS IN TWO VARIABLES  👉 An equation of the form `ax + by + c = 0`, where `a, b` and `c` are real numbers, such that `a` and `b` are not both zero, is called a linear equation in two variables . Examples: `1.2s + 3t = 5, p + 4q = 7, πu +…

The Fundamental Unit of Life

The Fundamental Unit of Life Back While examining a thin slice of cork, Robert Hooke saw that the cork resembled the structure of a honeycomb consisting of many little compartments. Cork is a substance that comes from the bark of a tree. This was i…

STRUCTURE OF THE ATOM CLASS 9 | STRUCTURE OF THE ATOM CLASS 9

📝STRUCTURE OF THE ATOM   Introduction  👉Atoms and molecules are the building blocks of matter. The existence of different kinds of matter around us is due to the different types of atoms and molecul…

CBSE Science Notes Class 9 | Matter in our surroundings

Back Introduction There are a large number of things around us that we see and feel. For example, you can see the book in front of you. The book occupies some space. Space occupied by the book is called its volume. If you pick up the book, you can a…

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