1 By comparison, machine shops also cut metal, but they are more concerned with the machining of parts on machine tools. 2  Firms that encompass both fab work and machining are also common. 3  Blacksmithing has always involved fabrication, although it was not always called by that name.
When water is in its solid state (ice) , the water molecules are packed close together preventing it from changing shape. Ice has a very regular pattern with the molecules rigidly apart from one another connected by the hydrogen bonds that form a crystalline lattice.
All of these are gases and yet have much higher molecular weights than water does. However, none of these can hydrogen bond, and that is why they are gases, whereas water is a liquid. Of course, at high temperatures water is a gas (steam) and at low temperatures water is a solid (ice). See the Web Links for more information about intermolecular forces. Why is water at room temperature a liquid?