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(exdenting for readability) Quiz question: Why are icicles clear? -- hydnjo talk 03:38, 3 December 2005 (UTC) [ reply ] They look clear because the freezing is incremental - but if you slice one, you will notice that there is a tendency for these bubbles to form in the center...so I guess they aren't really clear...
Drifting smoke particles indicate the movement of the surrounding gas.. Gas is one of the four fundamental states of matter.The others are solid, liquid, and plasma. [1] A pure gas may be made up of individual atoms (e.g. a noble gas like neon), elemental molecules made from one type of atom (e.g. oxygen), or compound molecules made from a variety of atoms (e.g. carbon dioxide).