Translations:Adventist Youth Honors Answer Book/Health and Science/Chemistry/50/en
From Pathfinder Wiki
4. What are the states of matter?
- Solid
- The atoms are in a fairly rigid structure that at the macroscopic level feels hard or solid. The atoms may be arranged in a very rigid crystaline structure, but there is still vibration within the structure.
- Liquid
- The atoms are free to move around, but do not separate like a gas. Liquids can flow and in general do not feel solid or rigid. Liquids are not compressible. When helium is cooled close to absolute zero, it behaves oddly, turning into a superfluid. It is dangerous to handle because of its temperature.
- Gas
- The molecules of a gas are completely free to move around and at standard room temperature they move tens of meters before hitting another molecule. A gas is airy. You will not necessarily know that it is there unless you move through it and feel the wind.
- Plasma
- The molecules of a plasma are ionized, which causes them to repel each other, so a plasma can appear to flow almost like a liquid, and it glows as some of the molecules change ionization states.
