Anything that occupies space, has weight and mass and which we perceive through our senses- touch, sight, hearing, smell and taste is called matter. Matter is made up of atoms or molecules.
Is energy matter: Electricity, light and heat are forms of energy. They might that take up space but not having weight. Electricity as a form of energy is closely related to atom which is matter.
Heat is the kinectic energy of molecules which again is matter.
|Solids are formed when attraction between individual molecules is greater than the energy causing them to move apart||Liquids are formed when energy of system is increased and rigid structure in solid shape is broken down||Gasses are formed when energy of system exceeds the attraction of molecules|
|They have definite shape and size||They have definite volume and takes the shape of container||They have no definite shape and volume.|
General properties of matter
- Matter occupies space : In this universe for bodies occupies space. The space occupied by a body is called its volume.
- Matter has weight : For bodies posses mass. Each body is attracted towards the centre of Earth.
- Matter has inertia: Nobody can change its state of rest for of uniform motion by itself. The property by which the body remains in its state of rest for of uniform motion is called inertia.
- Matter offers resistance: It is not possible to walk through a rigid wall or against a wind.
- Matter is divisible: All substances, solids, liquids or gases can be divided and subdivided into smaller particles.
- Compressibility: All substances can be compressed to a more or less extent by the application of force. Compressibility depends upon the center molecules spacing. The spacing is different for different solids.
- Porosity: All substances are porous that is they have center molecules spaces. Matters are less porous than wood.
|This principle states that when a solid body is wholly or partially immersed in a fluid (liquid or gas) it experiences and have vowed thrust or buoyant force equal to the weight of the fluid displaced by the body. This is also called as principal of buoyancy. It is due to uptrust that object apparently weight less when immersed in fluid. A hydrometer is an instrument built on the principle of flotation. The deeper the hydrometer floats in the liquid, the smaller is the relative density of the liquid|