Is Matter Around Us Pure? - Class 9 Science Notes
Introduction How do we define pure? The use of word ‘Pure’ in science means that all the constituent particles of a substance are the...
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Atoms and Molecules - Class 9 Science Notes
Laws of Chemical Combination Antoine L. Lavoisier laid the foundation of chemical sciences by establishing two important Laws of Chemical...
Structure of Atoms - Class 9 Science Notes
Introduction Matter is made up of fundamental building blocks, that is atoms and molecules. The existence of different kinds of matter is...
Tissues - Class 9 Science Notes
Introduction In unicellular organisms, a single cell performs all basic functions such as ingestion, digestion, absorption, reproduction,...
Diversity in Living Organism - Class 9 Science Notes
Introduction - Each organism is different from the other to a lesser or greater extent. - On one hand we have microscopic bacteria of a...
Fundamental Unit of Life - Class 9 Science Notes
Introduction What is a cell? A cell is considered as the building block of life. All living organisms are composed of these microscopic...
Motion - Class 9 Science Notes
Introduction Rest: A body is said to be in a state of rest when its position does not change with respect to a reference point. Motion: A...
Forces and Laws of Motion- Class 9 Science Notes
Introduction Force can be called as a push or pull on the object that enables us to do any work. For example in order to open the door we...
Gravitation - Class 9 Science Notes
Introduction What is Gravitational Force? Every object in the universe is attracting every other object of the universe. The force of...
Work and Energy - Class 9 Science Notes
The energy required for the life process comes from food. Activities like playing, singing, reading, writing, thinking, jumping, cycling...
Sound - Class 9 Science Notes
Introduction Sound is a form of energy which produces sensation of hearing in our ears It is produced due to vibration of different...
Why do we fall ill? - Class 9 Science Notes
What is Health? Health is a state of complete physical, mental and social well-being. It is not merely the absence of diseases. It is a...
Natural Resources - Class 9 Science Notes
Introduction Life on the earth depends on the resources like air, water, soil, etc. The resources available on the earth and the energy...
Improvement in Food Resources - Class 9 Science Notes
Introduction Food supplies proteins, carbohydrates, fats, vitamins and minerals, which are required for body development, growth and...
Matter in Our Surroundings
Introduction Everything in this universe is made up of material which scientists have named “matter”. The air we breathe, the food we...
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