central heating - a heating system in which air or water is heated at a central furnace and sent through the building via vents or pipes and radiators
exists and is an alternate of . Five physical characteristics of a mineral are: hardness, luster, diaphaneity, colour, and streak.
Rocks formed when other rocks are subjected to heat and pressure. (usually. sedimentary rocks) The metamorphic rock has some of the same characteristics of. the rock it is made from, but it is harder. The following shows the original rock. and the metamorphic rock it becomes when subjected to heat and pressure: