Sameer+-+Mixtures+and+Matter

MATTER AND MIXTURES

 * SOLlDS-**//Solids are usually hard because their molecules have been packed together. The closer your molecules are, the harder you are. Solids also can hold their own shape. A rock will always look like a rock unless something happens to it. The same goes for a diamond. Even when you grind up a solid into a powder, you will see little tiny pieces of that solid under a microscope. Liquids will move and fill up any container. Solids like their shape.//

__LIQUIDS-__ //liquids fill up the shape of a container. If you pour some water in a cup, it will fill up the bottom of the cup first and then fill the rest. The water will also take the shape of the cup. It fills the bottom first because of **gravity**. The top part of a liquid will usually have a flat surface. That flat surface is because of gravity too. Putting an ice cube (solid) into a cup will leave you with a cube in the middle of the cup; the shape won't change until the ice becomes a liquid.//

__GASES-__ Gases are **random** groups of atoms. In solids, atoms and molecules are compact and close together. Liquids have atoms a little more spread out. However, gases are really spread out and the atoms and molecules are full of energy. They are bouncing around constantly.Gases can fill a container of any size or shape. That is one of their physical characteristics. Think about a balloon. No matter what shape you make the balloon it will be evenly filled with the gas atoms. The atoms and molecules are spread equally throughout the entire balloon. Liquids can only fill the bottom of the container while gases can fill it entirely.


 * //__QUESTIONS -__//**

two of the main reasons I know why icebergs can float in antarctic and arctic waters is becase ice is less dense than the water it floats in and also because the water beneath it is cold enough to support the iceberg.I think that most of the iceberg is under as the water (liquid) would be cooler than the oxygen (gas) present at that time freezing more water inside the ocean / sea allowing the iceberg to be bigger. I also think that another reason why most of the iceberg would be under-water is because the water under-water would freeze is that cooler temperatures and less energy is found in liquids more than it is found in gases.I could test my hypothesis by
 * //__1. Why do icebergs float in antarctic and arctic waters? Do you think there is much of the iceberg under water or is it mostly above the water? How could you test your hypothesis?__//**
 * //__2. When you have a jar with a very tight lid, you can run it under hot water and it becomes easier to open. Why?__//**

A jar with a tight lid will become easier to open under / in running hot water as the heat from the hot water allows the solid`s / lid`s particles to recieve kinetic energy / heat energy making the lid bigger as the particles occupy more space ( in other words expanding the lid ).

=Colloids - Emulsions =

__//Mixture//__ || __//What are they//__ || __//Examples//__ ||  Sols || Solid + Liquid || A sol is a colloidal suspension of solid particles in a continuous liquid medium || Blood || Emulsions || Liquid + Liquid || a mixture of two or more immiscible (unblendable) liquids. || Salad Dressing || Foams || Gas + Liquid || A foam may be an internal phase of gas in an external phase of liquid or solid. In a liquid foam, a colloidal adsorptive agent forms a film that bounds the gas bubble || Shaving Cream || Gels || Solid + Liquid || //gels//, forming a wobbly but definitely solid body. This is really an extraordinary thing to happen. If you heat the gel, it will melt and form a viscous liquid. On cooling, it will gel again. If you dry it out, it will shrink and look horrible. On adding water, it will plump up again into a wiggly gel. These colloids are called //reversible// or //elastic//. The gels formed from inorganic hydroxides will not reform a gel once they have dried out, and the dry form will be brittle. || Jelly || Aerosels || Liquid + Gas || An aerosol of colloidal solid particles may be called a //smoke//, while if the particles are liquid, it is a //fog//. Sometimes the two are combined, in a suspension of solid particles with an adsorbed liquid film on the surface. The original //smog// was a smoke with a liquid film of sulphuric acid, which made it excessively unpleasant to breathe || Fly Spray || Smoke || Solid + Gas || An aerosol of colloidal solid particles may be called a //smoke//, while if the particles are liquid, it is a //fog//. Sometimes the two are combined, in a suspension of solid particles with an adsorbed liquid film on the surface. The original //smog// was a smoke with a liquid film of sulphuric acid, which made it excessively unpleasant to breathe || Smoke From Fire ||
 * __//Type//__ ||