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.
A rock is composed of combinations of minerals, each mineral having its own chemical formula and crystalline structure.Minerals are composed of an element or combination of elements. rock is combinations of minerals and either has to be an igneous, metamorphic, or sedimentary rock. A mineral is a solid that was formed in nature, has a definite chemical â¦ makeup, and has a crystal structure.