p2+g5

10-29-07 Gas is the state in which matter changes in both shape and volume. the amount of gas can change, for example helium in a metal cylinder consists of atoms that have been forced very close together. Gases are random groups of atoms. In solids, atoms and molecules are compact and close together. in liquid atoms are more spread out.

10-26-07 The state in which matter takes the shape of its container and has a definite volume is liquid. Liquids change shapes not volume, it takes the shape of whatever container it is put in. For example soda contains a certain volume of liquid regardless of whether you pour it into a larger container or a small one. because the particals in liquids are close to one another, it is difficult to push them colser together. two other important properties of liquids are surface tension and viscousity. liquids form spherical drops as a result of surface tension.