it says ...
DEFINE .. 1. Phases of matter - i looked it up but cant find it .
2.what are prperties of amorphous solid . * Give an example
3.* why is salt a crystalline solide and glass consideed an amorphous solid? ( when you strikea block of salt or glass and break it is there a pattern?)
this is 3 of 35 : ( can you please HELP me ...... tell me the answer or a site to find it .. or how to do it .. ANYTHING PLEASEEEE!!!!
2006-09-06 14:25:45 · 4 answers · asked by ♥♥ 2 in Science & Mathematics ➔ Other - Science
you dont have to help me on all of them .. just tell me like i know # 1 and you do it like .... ok .. but please help .. i dont understand them
2006-09-06 14:31:07 · update #1
Phases of matter: See link for details (long)
Amorphous Solid: any noncrystalline solid in which the atoms and molecules are not organized in a definite lattice pattern. Such solids include glass, plastic, and gel. (More details in the second and third links).
2006-09-06 14:39:23 · answer #1 · answered by Krynne 4 · 0⤊ 0⤋
The phases of matter were defined by the Greeks, though they called them elements. They are:
earth (solid)
water (liquid)
air (gas)
fire (plasma)
glass and sugar are examples of amorphous solids, which have no crystalline form and are really "supercooled" liquids with extremely high viscosities.
both sugar and glass have a high coefficient of elasticity and a very low elastic limit. Things bounce off "real good" until you reach the elastic limit, and then the stuff shatters.
Salt (NaCl) forms a crystal which is a cube. Breaking this cube may yield a pattern of smaller cubes. breaking glass does not produce a pattern.
I got all this out of my high school Chemistry & Physics textbooks.
I don't know of a SINGLE web page which would have all this info.
2006-09-06 22:01:04 · answer #2 · answered by Helmut 7 · 0⤊ 1⤋
there are three phases of matter in our world, gas, liquid, and solid. There are others as well. There is a plasma where the electrons are no longer attached to their nuclei, there is a Bose-Einstein condensate at temperatures approaching absolute zero, and there is neutronium as in a neutron star, consisting of packed neutrons with no atoms at all. When a liquid cools enough, it solidifies. If it forms a cyrstaline structure, it is a crystaline solid. When it just gets so cold that it can not flow anymore without forming any kind of a structure, it is an amorphous solid.
2006-09-06 21:37:16 · answer #3 · answered by Spencer B 1 · 0⤊ 0⤋
1. Just to add to the answer above.
A phase may also be crystalline or amorphous.
They start with a definition on this site
http://en.wikipedia.org/wiki/Phase_(matter)
2006-09-06 21:44:23 · answer #4 · answered by Anonymous · 0⤊ 0⤋