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.
Minerals are natural compounds formed through geological processes. Minerals are needed by the body in small amounts to help it function properly and stay strong. Iron, calcium, potassium, and sodium are some of essential minerals.Humans need small amounts of about 14 minerals to maintain normal body function and good health.race minerals includes Iron, Manganese, Copper, Iodine, Zinc, Fluoride, and Selenium. The physical characteristics of minerals include traits which are used to identify and describe mineral species. These traits include Shape, Color, Streak, Luster, Density, Hardness, Cleavage, Fracture, Tenacity, and Crystal Habit.