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.
Q1. Minerals are the materials of which rocks are made. A common example is granite, which is composed of the minerals quartz, feldspar, and mica. Each type of mineral has a distinctive composition and certain chemical and physical properties.1. Minerals are the materials of which rocks are made. A common example is granite, which is composed of the minerals quartz, feldspar, and mica. Each type of mineral has a distinctive composition and certain chemical and physical properties.