Aaryan Super Knowledge

Welcome To Aaryan super Knowledge Types of Matter - Is Matter Around Us Pure, Class 9, Science Powered by:- Aaryan sekh Full Screen Introduction We know that all the matter around us is not pure. If we observe some soil (Mitti) and some sugar placed on two different sheets of paper with a magnifying glass, we find soil contains clay particles, some grass particles, and even some dead insects etc. That is soil contains particles of different kinds is called an impure substance (or a mixture). Now observe sugar which contains only one kind of particles is called a pure substance. We can see that most of the matter around us exist as a mixture of two or more pure components, for example, milk, sea water, minerals etc. are all mixtures. Type of matter: On the basis of chemical nature, matter can be classified into two types: Pure substance. Impure substance (mixture) (i) Pure substance:  A homogeneous material which contains particles of only one kind and has

Welcome To Aaryan Super Knowledge Change of State of Matter - Matter in Our Surroundings, Class 9, Science Powered by:- Aaryan sekh Full Screen Change of state of matter:  A substance may exist in three states of matter i.e., solid, liquid or gas, depending upon the conditions of temperature and pressure. By changing the conditions of temperature and pressure, all three states could be obtained (solid, liquid, gas). On heating solid changes into a liquid which on further heating changes into a gas. Example - Water exists in all the three states. Solid: Ice Liquid: Water. Gas: Water Vapour Ice is a solid state and may be melted to form water (liquid) which on further heating changes into steam (gas). These changes can also be reversed on cooling. Change in three states of matter Temperature and pressure are the two factors which decide whether a given substance would be in a solid, liquid or gaseous state. (1) Effect of change of temperature: The eff