# Tag: Class 9

## Copy of Class 10 | Science | All In One

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## CBSE 9 | Science – Study – Free

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## BASICS OF QUADRILATERALS | Study

Pre-Requisires Test & Enrich Quadrilaterals | Speed Notes Notes For Quick Recap Quadrilateral Any closed polygon with four sides, four angles and four vertices are called Quadrilateral. It could be regular or irregular. (Sroll down to continute …) Study Tools Audio, Visual & Digital Content Revision Notes – CBSE 09 Math – Quadrilaterals Angle Sum…

## IMPROVEMENT IN FOOD RESOURCES | Study

Pre-Requisires Test & Enrich Speed Notes Notes For Quick Recap Study Tools Audio, Visual & Digital Content Dig Deep Topic Level Resources Sub – Topics Select A Topic Topic: Chapters Index Select Another Chapter Assessments Personalised Assessments

## MOTION | Study

Pre-Requisires Test & Enrich Rest And Motion | Speed Notes Notes For Quick Recap Rest And Motion Motion: An object is said to be in motion when its position changes with respect to the reference point with time. Rest: An object is said to be at rest when its position does not change with respect…

## FORCE AND LAWS OF MOTION | Study

Pre-Requisires Test & Enrich Speed Notes Notes For Quick Recap Force : Push or pull is called Force. Example: We push or pull to open a door. (Scroll down to continue …) Study Tools Audio, Visual & Digital Content Effects of Force Net or Resultant Force: Resultant Force or Net Force acts on a body…

## GRAVITATION | Study

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## WORK AND ENERGY | Study

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## SOUND | Study

## TISSUES | Study

Pre-Requisires Test & Enrich Tissues | Speed Notes Notes For Quick Recap Are plants and Animals made of same types of tissues?Plants are stationary, and hence are provided with some tissues made up of dead cells, which provide mechanical strength. They have to withstand unfavourable conditions like strong winds, storms, floods etc. Animals on other…

## THE FUNDAMENTAL UNIT OF LIFE | Study

Pre-Requisires Test & Enrich The Fundamental Unit of Life | Speed Notes Notes For Quick Recap What are Living organisms made up of?All living organisms are made up of cells. Cell is the basic structural and functional unit of complex organisms. History of cell: Cells were first discovered by Robert Hooke in 1665 with the…

## MATTER IN OUR SURROUNDINGS | Study

Pre-Requisires Test & Enrich Matter In Our Surroundings | Speed Notes Notes For Quick Recap Matter: 1. Characteristics of Matter Particles Anything (Physical Material not emotions, feelings etc.) which has mass and volume (occupy space) is called matter. We feel the presence of matter by one or more of our five sense organs. Matter is…

## IS MATTER AROUND US PURE | Study

Pre-Requisires Test & Enrich Speed Notes Notes For Quick Recap Matter: Anything that occupies space is called matter. Example: Air, water, rock etc., Matter exists in our surroundings in both pure and impure forms. (Scroll down to continue …). Study Tools Audio, Visual & Digital Content Mixture: A mixture is a matter that contains more…

## ATOMS AND MOLECULES | Study

Pre-Requisires Test & Enrich Speed Notes Notes For Quick Recap Study Tools Audio, Visual & Digital Content Laws of Chemical Combination: Antoine Laurent Lavoisier, is known as ‘Father of Modern Chemistry. Lavoisier put forward the law of conservation of mass, which laid the foundation of chemical sciences. Law of Conservation of Mass:Law of Conservation of…

## STRUCTURE OF THE ATOM | Study

Pre-Requisires Test & Enrich Speed Notes Notes For Quick Recap Study Tools Audio, Visual & Digital Content Charged Particles in Matter Atoms consist of an equal number of protons and electrons. Protons exist in the interiors of the atom and electrons exist in the exteriors of the atom. Therefore, electrons can be removed from an…

## CBSE 9 | Mathematics – Study – Premium

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## LINES AND ANGLES | Study

Pre-Requisires Test & Enrich Lines And Angles | Speed Notes Notes For Quick Recap Basic Terms And Definitions 1. Point – A Point is that which has no component. It is represented by a dot. A point is shown with a capital letter. Examples: A, B, C ….. Linear And Colinear Points 5. Collinear points:…

## QUADRILATERALS | Study

Pre-Requisires Test & Enrich Quadrilaterals | Speed Notes Notes For Quick Recap Quadrilateral Any closed polygon with four sides, four angles and four vertices are called Quadrilateral. It could be regular or irregular. (Sroll down to continute …) Study Tools Audio, Visual & Digital Content Revision Notes – CBSE 09 Math – Quadrilaterals Angle Sum…

## HERON’S FORMULA | Study

Pre-Requisires Test & Enrich Heron’s Formula | Speed Notes Notes For Quick Recap Perimeter Perimeter is defined as the outside boundary of any closed shape. To calculate the perimeter of a given shape we need to add all the sides of the shape. Example: The perimeter of a rectangle is the sum of its all…

## INTRODUCTION TO EUCLID’S GEOMETRY | Study

Pre-Requisires Test & Enrich Speed Notes Notes For Quick Recap Introduction to Euclid Geometry The necessity of geometry had been felt from ancient times in different parts of the world. The practical problems faced by people of ancient civilization had developed this branch of mathematics. Let us cite few examples. With floods in the river,…

## NUMBER SYSTEMS | Study

Pre-Requisires Test & Enrich Speed Notes Notes For Quick Recap Introduction to Natural Numbers Non-negative counting numbers excluding zero are called Natural Numbers. N = 1, 2, 3, 4, 5, ………. Whole Numbers All natural numbers including zero are called Whole Numbers. W = 0, 1, 2, 3, 4, 5, ……………. (Scroll down to continue…

## COORDINATE GEOMETRY | Study

Pre-Requisires Test & Enrich Coordinate Geometry: Cartesian Plane | Speed Notes Notes For Quick Recap Cartesian System A plane formed by two number lines, one horizontal and the other vertical, such that they intersect each other at their zeroes, and then they form a Cartesian Plane. Scroll Down To Continue … Study Tools Audio, Visual…

## POLYNOMIALS | Study

Pre-Requisires Test & Enrich Speed Notes Notes For Quick Recap Study Tools Audio, Visual & Digital Content Revision Notes on Polynomials Polynomial A polynomial is an algebraic expression that includes constants, variables, and exponents. It is the expression in which the variables have only positive integral powers. Example 1. 4×3 + 3×2 + x +3…

## LINEAR EQUATIONS IN TWO VARIABLES | Study

Pre-Requisires Test & Enrich Linear Equations in Two Variables | Speed Notes Notes For Quick Recap Linear Equations The equation of a straight line is the linear equation. It could be in one variable or two variables. Linear Equation in One Variable The equation with one variable in it is known as a Linear Equation…