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Matter In Our Surroundings |
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Matter can be defined as anything that occupies space, (i.e., has a volume), possesses mass, offers resistance and can be felt through one or more of our senses. |
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Is Matter Around us Pure |
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Matter that is divided into pure and impure substances can be further categorized. Pure substances can be divided into 'elements' and 'compounds'; impure substances, commonly called 'mixtures' can be further divided into homogeneous' and 'heterogeneous' mixtures. |
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Atoms and Molecules |
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Atoms of most of the elements do not exist independently. They either form molecules or ions. |
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Structure of the Atom |
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Everything that exists in our universe is made up of this tiny particle called atom. The computer you are working on is made up of atoms. |
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The Fundamental Unit of Life |
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All living organisms, whether plants or animals, are made up of microscopic units called cells. The cell occupies the same central position in biology as the atom in the physical sciences. |
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Tissues |
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A group of cells of the same type or of a mixed type having a common origin and performing similar functions are called tissues. |
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Diversity in Living Organisms |
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Taxonomy is a regular branch of science that is involved with the purpose of arranging or grouping organisms. |
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Motion |
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Kinematics deals with the study of motion without taking into account the cause of motion.Dynamics is concerned with the cause of motion, namely force. |
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Force and Laws Of Motion |
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Force is the external agent that changes the state of rest or uniform motion of a body along a straight line. |
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Gravitation |
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The force of attraction or force of gravitation between Earth (or any planet) and any other material objects in the universe is known as force of gravity or gravity. |
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Work and Energy |
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When a force acts on an object and the object moves in the direction of force, we say that the force has done work on the object. |
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Sound |
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Sound is the form of energy propagated as waves which our ears receive. When we speak, our vocal cords vibrate. When we play a guitar, the spring on it makes to and fro motion and produces sound. |
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Why do we Fall ill |
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The patient develops severe headache, high fever, painful contractions of the throat muscles and chest. |
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Natural Resources |
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Air, water, soil, minerals, coal, petroleum, animals and plants are referred to as natural resources. |
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Improvement in Food Resources |
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All living organisms need food for their existence. They need food for their growth, repair of tissues, energy and also protection against diseases. The various components of food are proteins, carbohydrates, fats, vitamins, minerals, roughage and water. |
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