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STATES OF MATTER

Physical States of Matter :                     Matter is anything that has mass and takes up space. It can be found in three different physical states: solid, liquid, and gas.                    1. Solids have a definite shape and volume. The particles in a solid are tightly packed together and vibrate in place. This is why solids have a fixed shape and cannot be easily compressed.                 2. Liquids have a definite volume but no definite shape. The particles in a liquid are still close together, but they are able to move around each other. This is why liquids can flow and take the shape of their container.                    3. Gases have no definite shape or volume. The particles in a gas are very far apart and move around very quickly. This ...
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PHYSICIAL QUANTITIES

PHYSICIAL QUANTITIES :                                                                        A physical quantity is a property of a material or system that can be quantified by measurement. A physical quantity can be expressed as a value, which is the algebraic multiplication of a ' Numerical value ' and a ' Unit '. For example, the physical quantity of mass can be quantified as '32.3 kg ', where '32.3' is the numerical value and 'kg' is the Unit. A physical quantity possesses at least two characteristics in common. Dimensions: A physical quantity has a certain number of dimensions, which are the basic units of measurement that are used to quantify it. For example, the dimensions of mass are length, mass, and time. Units: A physical quantity has a certain unit of measureme...
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INTRODUCTION TO BIOLOGY

INTRODUCTION TO  BIOLOGY:                                                                                       Biology  is a fascinating subject that deals with the study of living organisms and their interactions with their environment. It is a branch of science that explores the characteristics, behavior, structure, and functions of living things. The word biology was firstly used by a French biologist Jean-Baptiste Pierre Antoine de Monet de Lamarck (1744–1829)  from two Greek words bios (which means life) and logy ( which means study of ). Jean-Baptiste Pierre Antoine de Monet de Lamarck  At the foundation of biology lies the cell theory, which states ...
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