A topographic map is a sort of map categorized by large-scale detail and measurable illustration of relief, normally using contour lines that has an elevation of highest and lowest. The difference between highest and lowest contour lines is RELIEF, The high relief, and low relief. The example of high relief are mountains; they are mapped with large contour intervals. While plains are the example of low relief that normally mapped with small contour intervals.
The answer is true. Explanation : Arches appeared as early as the 2nd millennium BC in Mesopotamian brick architecture, and their systematic use started with the ancient Romans, who were the first to apply the technique to a wide range of structures.
Molten rock, usually rich in Silica and containing dissolved gases. a coarse grained (greater than 1 mm) rock composed predominantly of feldspar and quartz, is an intrusive rock.