Smart Class – The Best Quality Learning Environment

E- Waste means the electronics waste material that produces different chemical substances harmful results for our environment. E-waste has become one of the most power full threats for the world environment.

Mercury Hg, leads Pb are the most powerful harmful substance of e-waste. Laptop and UPS batteries contain this kind of substances that are very awful for Health.

The technology is changing day buy day we are depending of electronic and electrical equipment fro our daily needs. Therefore the numbers of electronic devices are increased 20 – 45 percent I n the recent decades. These electronic junk are not recycled properly and due to less space in we storing these waste in our nearest living places. Risk less management of e-wastes is causing a hazardous for any locality. The scientific solution of e- waste problem is not just collecting all the e-waste and throw that in a lonely place is not a solution. Different organizations are working to develop environment friendly e-waste solution for any institute of offices that refused to use the e-waste. Some organization never want to disposed there e-waste as they contain many important data about their employees – if it is a educational organization than e-waste sometimes contain important data that need s some kind of security, before damaging or recycling those data a storage devices they want proper destruction of these stored data. The e-wasted are recycled in more eco-friendly manners.

Matter and it’s compositionMatter is classified on the basis of physical & chemical properties.

Physical properties being solids liquids gases. Chemical properties –elements ,compounds & mixtures. Physical nature of matter is based on particles of matter. Particles mainly consists of molecules which consists of atoms . rain water contains 10 to the power 21 particles. Many evidences show that matter contain particles. It can be proved by diffusion & Brownian motion .for example if we open a perfume bottle at one corner of the room, It can be smelt in the whole room- it is because of diffusion. if a gas jar containing air is placed upside down on a gas jar of bromine vapour , both gases get equally mixed.

Matter is both rigid & fluid. Rigid-unbending & flexible. Fluid-can flow easily.Matter is mainly classified as physical & chemical. Physical –solids,liquids,gases.Chemical-elements,compounds,mixtures.Solids are classified as amorphous & crystalline.Mixtures are classified as homogenous & heterogenous.Solids have definite shape and volume.Liquids have definite volume but no definite shape.Gases have no definite shape or volume.

Change of state from- solid to liquid is called melting ,liquid to gas is called boiling-brought up by heating.Gas to liquid is called condensation,Liquid to solid is called freezing-brought down by cooling.Solid to gas or gas to solid is called sublimation-by heating or cooling.