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.
Igneous Rocks Igneous rocks form from the solidification of magma (molten rock). A reminder: magma is molten rock beneath the Earth s surface and lava is magma that is on the Earth s surface.The main characteristics of an Igneous rock are crystal size (grain size) and texture. The crystal size and texture of an igneous rock is dependant on where in the earth the rock formed. reminder: magma is molten rock beneath the Earth s surface and lava is magma that is on the Earth s surface. The main characteristics of an Igneous rock are crystal size (grain size) and texture. The crystal size and texture of an igneous rock is dependant on where in the earth the rock formed.