why does matter not melt and mix all the time with surrounding matter?
457562
The electrons in you repel the electrons in your clothes, and in everything else.
127488
Their difference in polarity and density are probably the two most likely properties to affect the rate of separation. Molecular weight differences between the two liquids would probably have some impact, also temperature would effect the rate of separation.
1172279
The anti matter is actually very unstable. It all got anhilited after reacting with the matter particles. The probability of an antiparticle  encountering a matter particle is very high because the matter is much much more compared to the antimatter, so probably most of the anti matter has already been 'burnt'.
625534
Everything goes from solid to whatever else one molecule at a time. It's just that under certain conditions, there is a spread between the energy that it takes to get away from the solid and the energy that it takes to exist as a gas. So, when you melt ice under one set of conditions, the molecules only have enough energy to break free from the ice crystals and go into solution. But, if the pressure is very low (outer space say) then that same amount of energy is enough to drive the water molecules into the gaseous phase instead.
47269
Matter is anything that has Mass and takes up space.  The general properties of matter are mass, weight, volume and density.   They are considered physical properties.\n\nLook around you and you will see matter.  Air is matter because it takes up space.  Heat and light does not have mass or takes up space, so it is not matter.  \n\nScientists have separated matter into states or phases.  Prior to 1985 there were 4 states or phases, today we have 5 states or phases.  Each of these phases certain properties associated with each phases.  Matter can be changed from one state or phase to another phase by energy.  There are five types of phase changes.
128926
When a substance is in liquid state, the cohesion between its molecules is pretty much different from something in a solid state.  Let's say, there is a larger gap between molecules.  This gives the substance a more "flexible" condition.  This flexibility (if we so call it) give the substance the property to adquire the shape of its container and if this container has two ends and a slanted angle... there you go!  It flows!
919735
In physics, matter is commonly defined as the substance of which physical objects are composed, not counting the contribution of various energy or force-fields, which are not usually considered to be matter per se (though they may contribute to the mass of objects). Matter constitutes much of the observable universe, although again, light is not ordinarily considered matter. Unfortunately, for scientific purposes, "matter" is somewhat loosely defined.\n\nSee http://en.wikipedia.org/wiki/Matter for more information on matter.\n\nGood Luck!!!
1053993
That question cannot be answered with the limited amount of information provided.  However,  if you consider the speed of the particles...then heat is the answer.  Considering anything else requires more information.
749533
All atoms have intermolecular forces that keep them together as solids or liquids. Adding energy will overcome these forces and cause them to change phase from solid->liquid->gas (with a few that jump straight from solid to gas).\n\nEnergy has to be added to cause this phase change. Going in the opposite direction requires withdrawing energy.\n\nThe types of forces or bonds (not chemical bonds) absorb energy when broken, give up energy when formed. It implies that the solids are in a lower energy state than liquids, and liquids lower than gases.\n\nThis said, when water turns in ice, heat energy is being withdrawn, and the molecules are getting into a more stable and fixed configuration with respect to each other. Because of the polar nature of water, it forms hydrogen bonds between molecules. These type of bonding means when water turns into ice, it positions the molecules into very specific configurations, to maintain the lowest energy state it can get to. Hence the formation of ice crystals.
590891
All matters dosnet expand on heat. Take ice, it shrinks or melts on heat. Hope you liked my short and sweet answwer.
678136
It's either God created it or it created itself. After the big bang, matter might have packed and packed together due to gravity. It packs itself, and pulls itself. As it becomes more dense, the center or core becomes hotter and hotter. The denser materials descend to the core, such as iron. Then at the surface, it's cool since it is exposed to space and is far from the core.
323024
All fluids are viscous.  Some are more so than others, and that has to do with how the fluid interacts with itself on a molecular level.
365184
tonnes and tonnes of it.  everything is antimatter because it is matter because on the spectram of "matter"  antimatter is matter.  just like wattter can get soo cold that it burns you (ice burn/frostbite)  or soo hot that it is cold all matter is anti antimatter which in turn is antimatter
1115695
To consider this, we have to assume that all matter is made up of molecules. By definition, liquid molecules are very close together such that the space between adjacent molecules is very small. Hence liquids are relatively incompressible. On the other hand, gases are defined such that the molecules are spread very far apart and hence the space between adjacent molecules is very large. This accounts for the compressibility of gases.
914449
Each material has a property known as "thermal conductivity" its  how easily or hard for heat can travel through a material. Heat will travel faster on materials with high or good thermal conductivity such as aluminum or copper and not as fast on material such as ceramics or bricks with low or poor thermal conductivity. \n\nThis has something to do with their atomic structure and bond strength between atoms. Think of atoms attached together with springs. When heat is introduced, atoms will start vibrating and its energy (from the heat) will "bounce" or shake its neighboring atoms and shake its other neighbor and so on... until every atom are shaking like crazy because they are transferring heat to the rest of the material.  Some takes more heat (or energy) to disturb the atomic structure of a material and heat doesn't travel or conduct "well" thru it. I hope this makes sense...
582418
put simply its complete bullshit... lol, solidification is just the slowing of atoms/molecules, sonce light ALWAYS (dont even go tehre with the whole medium thing, its always) travels at teh same speed... like i said before solidified light is bs. :-)
288484
It would depend on which substance you are studying. Every substance does not polymerize at the same temperature.